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WIFI module ESP-01 ESP-01S debugging downloader: the old board can only be debugged but not downloaded. The upgraded version adds a download circuit, which can be debugged and downloaded.
This price does not include the ESP8266 WIFI module, only the conversion board! ! !
This module is only a USB-to-serial module, which is only responsible for converting the USB interface into a serial port suitable for the ESP8266 module. For all the knowledge of WiFi, please check the relevant information of ESP8266 module to use! !
Use:
The main purpose of this adapter board is to facilitate the connection of ESP8266 to the PC through the serial port.
Material characteristics:
1. Using CH340 to serial port chip, stable performance, good compatibility, Windows system basically supports all.
2. The adapter board integrates 1000uF solid capacitors to ensure current supply and will not crash the WIFI module due to power problems.
3. Adopt 3225 SMD crystal oscillator to improve the stability of the serial port, and it is beautiful and tall.

ESP32-S adapter board
ESP32-S matching adapter board, 2.54mm spacing, leads to RESET and IO0 ports, can be inserted into breadboard, use DuPont wire leads, etc., which is convenient for development and debugging.
Size: 36mm*34mm
Weight: 5 g
ESP8266 expansion board
The ESP8266 expansion board can be connected to three WiFi modules: ESP-07, ESP-, ESP-E
Size: 31.6*27.8 mm
Weight: 5 g

ESP32-S adapter board
ESP32-S matching adapter board, 2.54mm spacing, leads to RESET and IO0 ports, can be inserted into breadboard, use DuPont wire leads, etc., which is convenient for development and debugging.
Size: 36mm*34mm
Weight: 5 g
ESP8266 expansion board
The ESP8266 expansion board can be connected to three WiFi modules: ESP-07, ESP-, ESP-E
Size: 31.6*27.8 mm
Weight: 5 g

USB 2.0 high-speed extender module HUB module Splitter One-to-four hub module.
Size: 29.5mm*18.9mm*4.8mm (length * width * height)
Reserve the power input port at the upper left corner of the board, marking the 5Vin position.
Tip: After connecting high-current peripherals, when the 5V power supply current from the USB input port is not enough, you can enable the external reserved power input port.
High speed, stability, low heat generation and low power consumption are our design concepts
We re-burned Linux kernel, Ubuntu, Android, windows XP, win2000, win 7, win8, win10 and other system platform drivers in the chip.
All systems are drive-free, plug-and-play, and can be extended with 4 channels of multi-interface equipment expansion modules.
Computer motherboard (the input of this module reserves a 2.54mm interface)
Expansion of the USB port of the all-in-one computer
USB port expansion for notebooks and tablets
Expansion of USB interface of Raspberry Pi, ARM, MIPS chip development board
Expansion of USB interface of advertising machine and network TV
Expansion of the USB port of the network camera, etc.
The USB extender module has no connection sockets, and reserved pads for each pin. The input holes are reserved for the standard 2.54mm and 2.0mm single-row pins on the main brain motherboard. The four USB ports are all 2.0mm single-row pins. Three 2mm diameter positioning holes
The bare PCBA board is convenient for users to DIY various interface peripherals.
The input adopts a standard USB male interface that matches the computer, which can be directly inserted into the computer's USB socket and used to expand each of the four reserved welding holes, which is convenient for DIY. Application examples, usually USB peripherals such as USB mouse, USB keyboard, etc. After a long time, the connection line is easy to break, resulting in the peripherals cannot be used normally. In fact, the Bunsen peripherals are not damaged. You can directly solder the peripherals to the following On the module, connected to the computer, the peripherals due to the line connection failure can be restored to use again.

Use:
It is widely used in motor speed detection, pulse counting, position limit, etc.
Module features:
1. Use imported slot-type optocoupler sensor with slot width 5mm.
2. There is an output status indicator, the output high-level light is off, and the output low-level light is on.
3. With obstruction, output high level; without obstruction, output low level.
4. Comparator output, clean signal, good waveform, strong driving ability, more than 15mA.
5. Working voltage 3.3V-5V
6. Output form: digital switch output (0 and 1)
7. Equipped with fixing bolt holes for easy installation
8. Small board PCB size: 3.2cm x 1.4cm
9. Use wide voltage LM393 comparator
Module instructions:
1. When there is no block in the module slot, the receiving tube is turned on and the module DO outputs low level; when blocked, DO outputs high level;
2. The DO output interface can be directly connected to the IO port of the single-chip microcomputer to detect whether the sensor is covered or not. If a motor encoder is used, the motor speed can be detected.
3. The module DO can be connected to a relay to form a limit switch and other functions, or it can be connected to an active buzzer module to form an alarm.
Product wiring instructions:
1. Connect VCC to the positive pole of the power supply 3.3-5V
2. GND connects to the negative pole of the power supply
3. DO TTL switch signal output
4. AO This module does not work
Shipping list:
Speed sensor module 1

Product special points
1. Can be measured in the environment.
2. Adjustable agility (indigo color potentiometer adjustment)
3. Work voltage 3.3V-5V
4. Export format Number related quantity export (0 sums 1 high and low level)
5. Installed fixed screw hole, expedient safety
6. Small PCB size: 3.2cm * 1.7cm
Imitation tangent explanation
1. VCC circumscribed 3.3V-5V voltage (can be directly given 5v single-sided desk sum 3.3v single-sided desk connection)
2. GND Circumscribed GND
3. OUT small plate opening amount import outlet (0 sums 1)
Instructions for use
1 The sound module is the most sensitive to the ambient sound intensity , and is generally used to detect the sound intensity of the surroundingenvironment.
2 When the environmental sound intensity of the module does not reach the set threshold, OUT outputs a high level; when the external environment sound intensity exceeds the set threshold, the module OUT outputs a low level.
3 The digital output OUT of the small board can be directly connected to the single chip microcomputer, and the high and low levels are detected by the single chip microcomputer, thereby detecting the sound of the environment.
4 The small board digital output OUT can directly drive our relay module, which can form a voice control switch.
Shipping list:
1pcs Voice Sound Detection Sensor Module 

Product information:
PAM8403 is a small digital power amplifier chip. The high-definition sound quality highlights the advantages of the digital chip. The circuit adopts the most reasonable peripheral configuration. The power filter is upgraded to 470uf (some sellers do not even have 100uf or even no capacitor) 1.6mm fiberglass sheet The power amplifier board is the most meticulous, outputting 3W 3W high-fidelity sound quality, which is a rare good product for power amplifier enthusiasts. The potentiometer adopts the original anti-meter body, and the lifespan can reach 15 years. The potentiometer with a switch can directly cut off the power supply counterclockwise. Since its listing, it has been well received by buyers!
Product name: PAM8403 digital power amplifier board
Specification model: XTW8403
Power supply range: 5V DC
Lowest output: 3W*2
Appearance size: 29.5*20.2*15mm (without protruding potentiometer rod)

C-DC USB step-down charging module (with working indicator light, standard gold-plated contact socket)
Compatible mobile phone models: Android series, iPhone series, Huawei, Xiaomi, Nokia. . .
Product size: 33*33*8mm
Product weight: 6.2g
Input voltage range: 6-24V
Output voltage: 5.2V (considering the loss of the charging circuit, the output end is 5.3-5.4V, and the load end is 5.1-5.2V)
Output current: 3A (with no heat sink, the stable output current is 2A)
Note 1: The input voltage cannot exceed 24V, otherwise the chip will be damaged!
Note 2: The input positive and negative poles cannot be reversed, otherwise the chip will be damaged!
Note 3: Do not touch the resistors, capacitors, and IC pins on the circuit board with your hands when the power is on, otherwise it may cause sudden changes in the output voltage and damage the equipment!

Product parameter
Controller chip: onboard high-performance microcontroller chip
Control chip: onboard CH340 USB control chip
LED indicator: onboard power LED indicator and relay LED indicator
Relay: Onboard 5V, 10A/250VAC, 10A/30VDC relay, the relay has a long service life, and can be activated continuously for 100,000 times
Protection function: with overcurrent protection and relay diode freewheeling protection function

MICRO USB female socket to DIP2.54mm straight plug, socket has been welded.
Size: 15*14mm
Weight: 1g

Module main technical parameters:
1.Working Voltage: 5V(DC)
2.Static current: Less than 2mA.
3.Output signal: Electric frequency signal, high-level 5V, low-level 0V.
4.Sensor angle: Not more than 15 degrees.
5.Detection distance: 2cm-450cm.
6.High precision: Up to 0.3cm
7.Input trigger signal: 10us TTL impulse
8.Echo signal: output TTL PWL signal
Mode of connection:
1.VCC
2.trig(T)
3.echo(R)
4.GND
Use method:
Supply module with 5V, the output will be 5V while obstacle in range, or 0V if not. The out pin of this module is used as a switching output when anti-theft module, and without the feet when ranging modules.
Note: the module should be inserted in the circuit before been power, which avoids producing a high level of misoperation; if not, then power again.
Module Working Principle:
1.Adopt IO trigger through supplying at least 10us sequence of high-level signal.
2.The module automatically sends eight 40khz square waves and automatically detects whether receives the returning pulse signal.
3.If there are signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving. Test distance =(high level time * sound velocity (340M/S) / 2.
Note: This module is not suitable to connect with electric power, if you need to connect this module with electronic power, then let the GND terminal of this module be connected first, otherwise, it will affect the normal work of the module.

Arduino dual axis button rocker PS2 game rocker joystick JoyStick electronic building blocks
Product introduction:
The dual-axis key rocker sensor module is made of PS2 rocker potentiometer, with (X, Y) 2-axis analog output and (Z) 1 button digital output. Cooperate with Arduino sensor expansion board to make interactive works such as remote control. In addition, in order to make this product more convenient for customers to cooperate with standard interfaces such as arduino expansion boards, the X, Y, and Z axis circuits are all led out separately in the design, and users can use the 3-pin ARDUINO dedicated line to plug into the expansion board. To use.
Product performance:
1. Input voltage range: DC 3.3V to 5V
2. Output signal: The module is equipped with two analog output and one digital output interface, the output value corresponds to the (X, Y) dual axis offset, the type is analog; the button indicates whether the user presses on the Z axis, Its type is digital switch quantity.
3. It can be programmed through the Arduino controller, and the sensor expansion board can be plugged in to complete creative remote control interactive works.
4. The cross rocker is a two-way 10K resistor. With the direction of the rocker, the resistance of the tap changes. This module uses 5V power supply. In the original state, the X and Y readout voltages are about 2.5V. When pressed in the direction of the arrow, the readout voltage value increases, up to 5V; when the arrow is pressed in the opposite direction, the readout voltage value decreases. , The minimum is 0V.
Product parameters:
Product name: Joystick module (two-axis key rocker)
Product size: 34.0mm * 26.0mm* 32.0mm (length x width x height)
Color: Black Product weight: 11.0g (including packaging)
Packaging: Single module electrostatic bag packaging
Material: FR4 electronic components

Color sensor principle
TCS230 adopts an 8-pin SOIC surface-mount package, with 64 photodiodes integrated on a single chip. These diodes are divided into four types. Among them, 16 photodiodes have a red filter; 16 photodiodes have a green filter; 16 photodiodes have a blue filter; the remaining 16 have no filters and can transmit all light information. These photodiodes are arranged in a cross in the chip, which can minimize the unevenness of incident light radiation, thereby increasing the accuracy of color recognition; on the other hand, 16 photodiodes of the same color are connected in parallel and distributed evenly In the diode array, the position error of the color can be eliminated. When working, the required filter is dynamically selected through two programmable pins. The typical output frequency of the sensor ranges from 2 Hz to 500 kHz, and the user can also select 100% , 20% , or 2% output scale factor, or power-off mode through two programmable pins. The output scale factor enables the output of t he sensor to adapt to different measurement ranges and improves its adaptability. For example, when using a low-speed frequency counter, you can select a small scale value to match the output frequency of the TCS230 with the counter.
Product introduction:
1. The originally imported chip TCS3200 PCB board adopts gold plating process
2. TCS3200 is an upgraded version of TCS230 with a better effect
3. Power supply 3-5v
4. Anti-light interference
5. White LED can be controlled to turn on and off.
6. Can detect the color of non-luminous objects
7. PCB size: (L)33mm*(W)25mm

Color sensor principle
TCS230 adopts an 8-pin SOIC surface-mount package, with 64 photodiodes integrated on a single chip. These diodes are divided into four types. Among them, 16 photodiodes have a red filter; 16 photodiodes have a green filter; 16 photodiodes have a blue filter; the remaining 16 have no filters and can transmit all light information. These photodiodes are arranged in a cross in the chip, which can minimize the unevenness of incident light radiation, thereby increasing the accuracy of color recognition; on the other hand, 16 photodiodes of the same color are connected in parallel and distributed evenly In the diode array, the position error of the color can be eliminated. When working, the required filter is dynamically selected through two programmable pins. The typical output frequency of the sensor ranges from 2 Hz to 500 kHz, and the user can also select 100% , 20% , or 2% output scale factor, or power-off mode through two programmable pins. The output scale factor enables the output of t he sensor to adapt to different measurement ranges and improves its adaptability. For example, when using a low-speed frequency counter, you can select a small scale value to match the output frequency of the TCS230 with the counter.
Product introduction:
1. The originally imported chip TCS3200 PCB board adopts gold plating process
2. TCS3200 is an upgraded version of TCS230 with a better effect
3. Power supply 3-5v
4. Anti-light interference
5. White LED can be controlled to turn on and off.
6. Can detect the color of non-luminous objects
7. PCB size: (L)33mm*(W)25mm

Features:
1. The module integrates a posture solver, with a dynamic Kalman filter algorithm, can accurately output the current posture of the module in a dynamic environment, the posture measurement accuracy is 0.01 degrees, the stability is extremely high, and the performance is even better than some professional inclination angles. instrument!
2. Using a high-precision gyro accelerometer MPU6050, the measurement data of MPU6050 is read through the processor and then output through the serial port, eliminating the need for users to develop the complicated I2C protocol of MPU6050.
3. The use of careful PCB layout and craftsmanship ensures that the MPU6050 receives the least external interference and the highest measurement accuracy.
4. The internal voltage stabilization circuit of the module is compatible with 3.3V/5V embedded system, and the connection is convenient.
5. The module retains the I2C interface of the MPU6050 to meet the needs of advanced users who wish to access the underlying measurement data.
6. The use of advanced digital filtering technology can effectively reduce measurement noise and improve measurement accuracy.
The stamp hole is gold-plated to ensure quality and can be embedded in the user's PCB board.
Module parameters:
1. Voltage: 3V~6V
2. Current: <10mA
3. Volume: 15.24mm X 15.24mm X 2mm
4. Pad spacing: up and down 100mil (2.54mm), left and right 600mil (15.24mm)
5. Measurement dimensions: acceleration: 3 dimensions, angular velocity: 3 dimensions, attitude angle: 3 dimensions
6. Range: acceleration: ±16g, angular velocity: ±2000°/s.
7. Resolution: acceleration: 6.1e-5g, angular velocity: 7.6e-3°/s.
8. Stability: acceleration: 0.001g, angular velocity 0.02°/s.
9. Stability of attitude measurement: 0.01°.
10. The data output frequency is 100Hz (115200 baud rate)/20Hz (9600 baud rate).
11. Data interface: serial port (TTL level), I2C (directly connected to MPU6050, no attitude output)
10. The baud rate is 115200kps/9600kps.
11. Provide sample code for MCU analysis.

Product parameter
1. On-board precision miniature voltage transformer
2. The onboard high-precision operational amplifier circuit can accurately sample the signal and properly compensate the signal.
3. The module can measure AC voltage within 250V, and the corresponding output analog quantity can be adjusted
4. PCB board size: 49.5(mm)x19.4(mm)

Product description:
Measuring range: DC 3V-9V, current: 0-3A (error: ±1% ) maximum support 5A
5A current (the error will be 3% larger after more than 3A). Weight: 25g Packing: anti-static bag
The USB voltmeter ammeter can easily measure the output voltage of the USB port and the working current of the device! (Please note: it can only truthfully display the real-time working voltage and current of electrical appliances, and does not have the function of a discharge meter, that is, it cannot set a certain voltage and certain current to discharge! Small size, no power supply and other auxiliary equipment, namely Plug and play! It also detects the charging current and voltage of any USB charger (computer USB, home charger, car charger) to determine whether the performance of the charger and the performance of the charging cable meet the requirements! The scope of application is wide, any Mobile phones, any electronic products, can be used, easy to operate, suitable for factories, exhibition demonstrations, laboratories and users!
Features:
1. This product can measure the voltage of the USB power supply device when it is empty and loaded, and the voltage and current of the USB terminal device when it is working.
2. Current and voltage cycle display, easy to use and practical.
3. Small and easy to carry, no need to connect to a power supply

ESP32-S adapter board
ESP32-S matching adapter board, 2.54mm spacing, leads to RESET and IO0 ports, can be inserted into breadboard, use DuPont wire leads, etc., which is convenient for development and debugging.
Size: 36mm*34mm
Weight: 5 g
ESP8266 expansion board
The ESP8266 expansion board can be connected to three WiFi modules: ESP-07, ESP-, ESP-E
Size: 31.6*27.8 mm
Weight: 5 g

ESP32-S adapter board
ESP32-S matching adapter board, 2.54mm spacing, leads to RESET and IO0 ports, can be inserted into breadboard, use DuPont wire leads, etc., which is convenient for development and debugging.
Size: 36mm*34mm
Weight: 5 g
ESP8266 expansion board
The ESP8266 expansion board can be connected to three WiFi modules: ESP-07, ESP-, ESP-E
Size: 31.6*27.8 mm
Weight: 5 g

Description:
Chip: SIM800L
Voltage: 3.7-4.2V
Support networks: China Mobile, China Unicom and global quad-band network
Module size: 2.5cmx2.3cm
TTL serial port for serial port, you can link directly to the microcontroller. No need MAX232
Power module automatically boot, homing network
Onboard signal lights all the way . It flashes slowly when there is a signal, it flashes quickly when there is no signal
Package Included:
1 X SIM800L GPRS GSM Module

Product Introduction
ESP-WROOM-32 is a universal Wi-Fi BT BLE MCU module with powerful functions and a wide range of uses. It can be used for low-power sensor networks and demanding tasks, such as voice encoding, audio streaming and MP3 decoding, etc. .
The core of this module is the ESP32-DOWDQ6 chip, which is scalable and adaptive. The two CPU cores can be individually controlled or powered on. The adjustment range of the clock frequency is from 80MHz to 240MHz. The user can cut off the power of the CPU and use the low-power coprocessor to continuously monitor the status change of the peripherals or whether certain analog quantities exceed the interval value. ESP32 also integrates a wealth of peripherals, including capacitive touch sensors, Hall sensors, low-noise sensor amplifiers, SD card interface, Ethernet interface, high-speed SDIOSPI, UART, I2S and I2C.
Features
1. The onboard CP2102 stable USB to TTL chip ensures the normal communication of the serial port.
2. Support automatic download, no need to manually switch download and operation mode.
3. Immersion gold craft.
4. Support development on Windows system (cygwin and msys32 simulation environment) and Linux system
5. Support ESP32
CPU andMemory
ESP32-DOWDQ6 has two built-in low-power Xtensa@32-bitLX6MCUs. On-chip storage includes: 448KB of ROM, used for program startup and kernel function calls. 520KB on-chip SRAM for data and instruction storage. The 8KB of SRAM in the RTC, that is, the RTC slow memory, can be accessed by the coprocessor in Deep-sleep mode. The 8KB of SRAM in the RTC, that is, the RTC fast memory, can be used for data storage and accessed by the main CPU when the RTC is started in Deep-sleep mode. 1kbit eFuse, of which 256bit is dedicated to the system (MAC address and chip settings); the remaining 768bit is reserved for user applications, these applications include Flash encryption and chip ID.
ESP-WROOM-32 integrates 4MB SPI Fl ash.

Product Introduction
ESP-WROOM-32 is a universal Wi-Fi BT BLE MCU module with powerful functions and a wide range of uses. It can be used for low-power sensor networks and demanding tasks, such as voice encoding, audio streaming and MP3 decoding, etc. .
The core of this module is the ESP32-DOWDQ6 chip, which is scalable and adaptive. The two CPU cores can be individually controlled or powered on. The adjustment range of the clock frequency is from 80MHz to 240MHz. The user can cut off the power of the CPU and use the low-power coprocessor to continuously monitor the status change of the peripherals or whether certain analog quantities exceed the interval value. ESP32 also integrates a wealth of peripherals, including capacitive touch sensors, Hall sensors, low-noise sensor amplifiers, SD card interface, Ethernet interface, high-speed SDIOSPI, UART, I2S and I2C.
Features
1. The onboard CP2102 stable USB to TTL chip ensures the normal communication of the serial port.
2. Support automatic download, no need to manually switch download and operation mode.
3. Immersion gold craft.
4. Support development on Windows system (cygwin and msys32 simulation environment) and Linux system
5. Support ESP32
CPU andMemory
ESP32-DOWDQ6 has two built-in low-power Xtensa@32-bitLX6MCUs. On-chip storage includes: 448KB of ROM, used for program startup and kernel function calls. 520KB on-chip SRAM for data and instruction storage. The 8KB of SRAM in the RTC, that is, the RTC slow memory, can be accessed by the coprocessor in Deep-sleep mode. The 8KB of SRAM in the RTC, that is, the RTC fast memory, can be used for data storage and accessed by the main CPU when the RTC is started in Deep-sleep mode. 1kbit eFuse, of which 256bit is dedicated to the system (MAC address and chip settings); the remaining 768bit is reserved for user applications, these applications include Flash encryption and chip ID.
ESP-WROOM-32 integrates 4MB SPI Fl ash.

SHTC3 high-precision digital temperature and humidity sensor measurement module
Technical Parameters:
1. Humidity measurement range: 0~100% RH
2. Humidity measurement accuracy: ±2% RH
3. Temperature measurement range: -40~125℃
4. Temperature measurement accuracy: ±0.2℃
5. Working voltage: 3.3~5VDC
6. I2C interface output
Pin description
1. VDD power supply 3.3～5.5V DC
2. GND is grounded, the negative pole of the power supply
3. SDA serial data, bidirectional port
4. SCL serial clock, input port
Application occasions:
HVAC, dehumidifiers, agriculture, cold chain storage, testing and inspection equipment, consumer products, automobiles, automatic control, data loggers, weather stations, home appliances, humidity regulators, medical, and other related humidity detection and control.
Schematic diagram
Dimensions

SHTC3 high-precision digital temperature and humidity sensor measurement module
Technical Parameters:
1. Humidity measurement range: 0~100% RH
2. Humidity measurement accuracy: ±2% RH
3. Temperature measurement range: -40~125℃
4. Temperature measurement accuracy: ±0.2℃
5. Working voltage: 3.3~5VDC
6. I2C interface output
Pin description
1. VDD power supply 3.3～5.5V DC
2. GND is grounded, the negative pole of the power supply
3. SDA serial data, bidirectional port
4. SCL serial clock, input port
Application occasions:
HVAC, dehumidifiers, agriculture, cold chain storage, testing and inspection equipment, consumer products, automobiles, automatic control, data loggers, weather stations, home appliances, humidity regulators, medical, and other related humidity detection and control.
Schematic diagram
Dimensions

This product is a breakout board for Allegro’s A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection; please read the A4988 datasheet carefully before using this product. This stepper motor driver lets you to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and 2 A.
The translator is the key to the easy implementation of the A4988. Simply inputting one pulse on the STEP input drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program.The A4988 interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.
Simple step and direction control interface;
Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step;
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated;
Voltage to achieve higher step rates;
3.3 and 5 V compatible logic supply
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay);
Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection;
Short-to-ground and shorted-load protection.
The DRV8825 stepper motor driver carrier is a breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver.
The module has a pinout and interface that are nearly identical to those of our A4988 stepper motor driver carriers, so it can be used as a higher-performance drop-in replacement for those boards in many applications.
The DRV8825 features adjustable current limiting, overcurrent and overtemperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2 – 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling).
Simple step and direction control interface
Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
Can interface directly with 3.3 V and 5 V systems
Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
Short-to-ground and shorted-load protection
4-layer, 2 oz copper PCB for improved heat dissipation
Exposed solderable ground pad below the driver IC on the bottom of the PCB
Module size, pinout, and interface match those of our A4988 stepper motor driver carriers in most respects (see the bottom of this page for more information)
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
45 V maximum supply voltage
Built-in regulator (no external logic voltage supply needed)
1*A4988/DRV8825 Stepper Motor Driver
1*Heat sink

This product is a breakout board for Allegro’s A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection; please read the A4988 datasheet carefully before using this product. This stepper motor driver lets you to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and 2 A.
The translator is the key to the easy implementation of the A4988. Simply inputting one pulse on the STEP input drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program.The A4988 interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.
Simple step and direction control interface;
Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step;
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated;
Voltage to achieve higher step rates;
3.3 and 5 V compatible logic supply
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay);
Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection;
Short-to-ground and shorted-load protection.
The DRV8825 stepper motor driver carrier is a breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver.
The module has a pinout and interface that are nearly identical to those of our A4988 stepper motor driver carriers, so it can be used as a higher-performance drop-in replacement for those boards in many applications.
The DRV8825 features adjustable current limiting, overcurrent and overtemperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2 – 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling).
Simple step and direction control interface
Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
Can interface directly with 3.3 V and 5 V systems
Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
Short-to-ground and shorted-load protection
4-layer, 2 oz copper PCB for improved heat dissipation
Exposed solderable ground pad below the driver IC on the bottom of the PCB
Module size, pinout, and interface match those of our A4988 stepper motor driver carriers in most respects (see the bottom of this page for more information)
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
45 V maximum supply voltage
Built-in regulator (no external logic voltage supply needed)
1*A4988/DRV8825 Stepper Motor Driver
1*Heat sink

Technical Index:
Compatible with USB2.0
ADUM3160 isolation voltage: 2500V
Power module isolation voltage: 1500V
Support USB full-speed 12Mbps, not hungry speed device
Support USB control transmission, batch transmission, interrupt transmission, synchronous/isochronous transmission
Power supply: from the USB port of the host computer
Drive-free, more convenient to use
Use environment: -40~85degree
Tested and supported devices:
Full speed equipment:
USB flash drives, digital cameras, card readers, mobile hard drives, USB shields, USB hubs, AVRJTAG, AVRISP, AVRISPMKII, S-Lab,JET51, J-Link, FET430UIF, PICKIT2, XDS100, LPC-Link, ICD2, USB to serial port (FT232, CP2102, PL2303, CH341 chips)
USB wireless network card, some USB3.0 flash drives that are not supported by the test
Why should the USB interface be isolated?
The USB interface is already one of the most commonly used interfaces for electronic engineers and practitioners in their daily work and life. With the increasing competition in the computer industry, product prices are getting lower and lower,
Forcing most businesses to simplify the interface protection part of the computer motherboard to simplify it, and save it if it can save it. The USB interface is not only in contact with the human body and the outside, but also in many cases
External equipment power supply. These many current conditions have led to an early strike on the USB ports of many computers. Even the motherboard is damaged.
This product is suitable for the following users:
1. Working environment with strong electricity and strong interference
Some circuits contain strong electricity and strong interference (such as high-voltage electricity, frequency converter, motor drive, etc.) environment,
When it comes to connecting with a computer, it must be isolated to ensure the computer and personal safety.
2. Noise sensitive areas
Everyone knows that computers are a great source of noise. In noise-sensitive areas, we can use this device to isolate the USB interface. Such as high-precision USB data acquisition system, HIFI audio system.
3. USB debugging device
For example, various USB interface JTAG/SWD emulators, ISP/ASP/IAP/ICP downloaders, etc. When you are often unable to connect or emulate abnormalities during debugging, you can use a USB isolator to try to improve.
4. Various industrial USB devices
In an industrial environment, USB devices often crash, such as USB mice, keyboards, and USB-to-serial communication devices. The USB isolator can effectively reduce the crash and damage probability of these devices in an industrial environment.
Sometimes it is necessary to extend the USB cable. The USB isolator can act as a very good USB repeater and can also isolate the ground pressure difference between upstream and downstream devices.
5. Other common USB peripherals, such as mouse, keyboard, USB sound card, USB flash drive, printer, digital camera, USB hub (HUB), USB camera.

1.FT245BL
USB stand-alone chip for parallel FIFO bidirectional data transmission interface
Complete USB protocol processing chip-no specific USB firmware programming is required
USB to FIFO, MCU communicates with PC
2.USB interface
Provide mini USB interface
3. VCCIO power supply jumper
Jumper caps can be used to select VCCIO to connect to 5V or 3.3V voltage respectively (VCCIO can be used to supply power to the VCC pin of the connected board)
4. Power indicator
Module power indicator, easy to check the power supply status of the module
5. Interface
Connect to the corresponding interface of the MCU
6. size
Length: 40MM Width: 30MM

Description:
100% brand new and high quality
L3G4200D 3-Axes Gyroscope Angular Rate Sensor Module
This is a breakout board for the L3G4200D low-power three-axis angular rate sensor.
The L3G4200D has a full scale of ±250/±500/±2000 dps and is capable of measuring rates with a user-selectable bandwidth.
These work great in gaming and Useful virtual reality input devices, GPS navigation systems, and robotics.
Name: GY-50 L3G4200D module (three-axis gyroscope module)
Use chip: L3G4200D
Power supply: 3~5v
Communication method: IIC/SPI communication protocol
Measuring range: 250/500/2000 DPS
Communication Interface: I2C (up to 400 kHz) or SPI (10 MHz; 4 & 3 wire)
Operating temperature: -40 ~ 185 °F (-40 ~ 85 °C)
Size: 23mm * 23mm
Color: Blue

The difference between the temperature and humidity sensor HTU20D and HTU21D sensor modules is that the humidity measurement accuracy is different, the software and hardware are fully compatible, and the customer can choose by themselves
Based on high-performance humidity sensing elements, the new generation of HTU20/HTU21D temperature and humidity sensors has established a new standard in size and intelligence: it is embedded in a dual-row flat no-lead DFN package suitable for reflow soldering, with a bottom surface of 3x3mm, The height is 1.1mm. The sensor outputs a calibrated digital signal in a standard I2C format. Diversified output modes, wide operating voltage range, and high-temperature accuracy and humidity accuracy at the same time. HTU2X series modules are specially designed for low power consumption and small volume applications. They have the advantages of good quality, fast response speed, strong anti-interference ability, high-cost performance, etc., small size (3x3mm), and extremely low power consumption.
Important parameters of the sensor:
Power supply voltage: 1.5V—3.6
Humidity measurement range: 0-100% RH
Temperature measurement range: -40℃—105℃
Maximum power consumption: 2.7uW
Communication method: I2C
Humidity accuracy range (10% RH to 95% RH): HTU20D±3% RH HTU21D±2% RH
Humidity hysteresis: ±1% RH
Measuring time: 50ms
Annual drift: -0.5% RH/year
Response time: 5 s
At the same time, HTU20D and HTU21D can be fully compatible with Swiss SHT20 and SHT21. Pinto Pin can be implemented on the hardware pins without modifying the circuit board. The software program is also the same as the Swiss SHT20 and SHT21, which can realize compatible replacement without any modification. Has a very good price advantage, very cost-effective.
HTU20D, HTU21D ultra-small temperature, and humidity integrated digital output module is a product with excellent performance. At the same time, HTU20D and HTU21D have great advantages in terms of price, performance, and power consumption.

The difference between the temperature and humidity sensor HTU20D and HTU21D sensor modules is that the humidity measurement accuracy is different, the software and hardware are fully compatible, and the customer can choose by themselves
Based on high-performance humidity sensing elements, the new generation of HTU20/HTU21D temperature and humidity sensors has established a new standard in size and intelligence: it is embedded in a dual-row flat no-lead DFN package suitable for reflow soldering, with a bottom surface of 3x3mm, The height is 1.1mm. The sensor outputs a calibrated digital signal in a standard I2C format. Diversified output modes, wide operating voltage range, and high-temperature accuracy and humidity accuracy at the same time. HTU2X series modules are specially designed for low power consumption and small volume applications. They have the advantages of good quality, fast response speed, strong anti-interference ability, high-cost performance, etc., small size (3x3mm), and extremely low power consumption.
Important parameters of the sensor:
Power supply voltage: 1.5V—3.6
Humidity measurement range: 0-100% RH
Temperature measurement range: -40℃—105℃
Maximum power consumption: 2.7uW
Communication method: I2C
Humidity accuracy range (10% RH to 95% RH): HTU20D±3% RH HTU21D±2% RH
Humidity hysteresis: ±1% RH
Measuring time: 50ms
Annual drift: -0.5% RH/year
Response time: 5 s
At the same time, HTU20D and HTU21D can be fully compatible with Swiss SHT20 and SHT21. Pinto Pin can be implemented on the hardware pins without modifying the circuit board. The software program is also the same as the Swiss SHT20 and SHT21, which can realize compatible replacement without any modification. Has a very good price advantage, very cost-effective.
HTU20D, HTU21D ultra-small temperature, and humidity integrated digital output module is a product with excellent performance. At the same time, HTU20D and HTU21D have great advantages in terms of price, performance, and power consumption.

This power amplifier board is designed with the official standard circuit, and the chip selection uses PAM8610, Class D audio power amplifier. The power amplifier board has super high efficiency, superpower, and can output 10W 10W power under the condition of 12V power supply. The chip does not need a heat sink, and it also has protection functions such as overheating and overcurrent. The function can be said to be very powerful. With switch function, short-circuit SW to turn off the power amplifier.
Product parameter
Specification model

PAM8610 power amplifier board
Working mode

Class D (PWM modulation)
Chip selection

PAM8610
Power supply voltage

DC 7V~15V (self-protection)
Recommended voltage

DC 12V3A
Heat dissipation volume

No need for heat dissipation
Output function

10W*2(8Ω) 15W*2(4Ω)
Frequency response

20Hz~20KHz
Channel type

Dual-channel
Shut-off current

4mA
Quiescent current

20mA (at DC12V)
Signal to noise ratio

86%
Total harmonic distortion

5W/1KHz/8Ω------0.1%
Input impedance

15Ω
Output impedance

4~8Ω
Recommended speakers

10~100W
Size

30mm*25mm*2.5mm
Weight

4g

The MAX7219 is an integrated serial input / output common-cathode display driver, it is connected to a microprocessor with 8-digit 7-segment digital LED display that can also be connected to the bar graph display or 64 separate LED. On B BCD encoder including an on-chip, multi-channel scanning loop word drive, but also an 8 x 8 static RAM is used to store each data. Only one external register is used to set the current of each LED segment.
 A convenient four-wire serial interface can connect all general-purpose microprocessors. Each data can be addressed in the update does not need to rewrite all the display. MAX7219 also allows the user to select on each data coding or non-coding.
The entire device contains a 150 μA low-power shutdown mode, analog, and digital brightness control, a scan-limit register that allows the user to display the 1-8 bits of data, as well as a let all, LED light detection mode.
Only need three IO ports can drive a dot-matrix! Dot-matrix display, flicker-free! Supports cascading!
This price is the price of the DIY kit, not a finished product price!
Disclaimer: All components are brand new, PCB board after all the test stand test to ensure the physical well-connected. The welded risk once welding does not accept returns. But can help customers free commissioning, repair, return shipping costs borne by the customer !!
Module parameters:
A single module can drive an 8 * 8 common cathode lattice
2 module operating voltage: 5V
Module size: 5 cm in length X width 3.2 cm x 1.5 cm
4 with four screws hole, aperture 3mm, Our M3 Tongzhu fixed
5 modules with input and output interface, supports multiple modules cascade
Wiring instructions:
The module on the left is an input port, output port on the right.
Control of a single module, simply input port to the CPU
3 more modules cascade input termination module of a CPU, 2 output termination module input and output of the two modules is terminated with the input end of the first three modules, and so on.
51 MCU, for example:
VCC → 5V
GND → GND
DIN → P22
CS → P21
CLK → P20
Shipping list:
1 * MAX7219 dot matrix module (finished with dot matrix, have been tested well)
1 * DuPont line

The MAX7219 is an integrated serial input / output common-cathode display driver, it is connected to a microprocessor with 8-digit 7-segment digital LED display that can also be connected to the bar graph display or 64 separate LED. On B BCD encoder including an on-chip, multi-channel scanning loop word drive, but also an 8 x 8 static RAM is used to store each data. Only one external register is used to set the current of each LED segment.
 A convenient four-wire serial interface can connect all general-purpose microprocessors. Each data can be addressed in the update does not need to rewrite all the display. MAX7219 also allows the user to select on each data coding or non-coding.
The entire device contains a 150 μA low-power shutdown mode, analog, and digital brightness control, a scan-limit register that allows the user to display the 1-8 bits of data, as well as a let all, LED light detection mode.
Only need three IO ports can drive a dot-matrix! Dot-matrix display, flicker-free! Supports cascading!
This price is the price of the DIY kit, not a finished product price!
Disclaimer: All components are brand new, PCB board after all the test stand test to ensure the physical well-connected. The welded risk once welding does not accept returns. But can help customers free commissioning, repair, return shipping costs borne by the customer !!
Module parameters:
A single module can drive an 8 * 8 common cathode lattice
2 module operating voltage: 5V
Module size: 5 cm in length X width 3.2 cm x 1.5 cm
4 with four screws hole, aperture 3mm, Our M3 Tongzhu fixed
5 modules with input and output interface, supports multiple modules cascade
Wiring instructions:
The module on the left is an input port, output port on the right.
Control of a single module, simply input port to the CPU
3 more modules cascade input termination module of a CPU, 2 output termination module input and output of the two modules is terminated with the input end of the first three modules, and so on.
51 MCU, for example:
VCC → 5V
GND → GND
DIN → P22
CS → P21
CLK → P20
Shipping list:
1 * MAX7219 dot matrix module (finished with dot matrix, have been tested well)
1 * DuPont line

What's new about V2.1.0
 Use BRT (Bias Resistor Transistor), easier into flash mode.
 Optimize the circuit, the system is more stable.
About D1 R2
based on the ESP-8266EX.
Arduino Compatible, you can use it on Arduino IDE.
NodeMcu Compatible
11 Digital I/O pins
1 Analog Input pin
OTA -- Wireless Upload(Program)
On board switching power supply -- Max 24V input, 5V 1A output

Description:
100% brand new and high quality.
ESP32 is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters, and power management module. The entire solution takes up the least amount of printed circuit board area. This board is used with dual-mode Wi-Fi and Bluetooth chips, which is safe, reliable, and scalable to a variety of applications.
Specifications:
High performance-price ratio
Small volume, easily embeded to other products
DC 5V-12V
1 analog input(3.2V max input)
A Micro USB connection
Compatible with for Arduino
D1 R32=WiFi Bluetooth
Size: 6.8*5.3cm/2.68*2.09inch
Quantity: 1 Pc
Package Included:
1 Pc * Development Board
Notes:
1.Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Features:
1. On-board precision miniature current transformer
2. The onboard high-precision operational amplifier circuit can accurately sample the signal and properly compensate the signal.
3. The module can measure AC current within 5A, and the corresponding output analog quantity can be adjusted
4. PCB board size: 38(mm)x18.5(mm)
Instructions:
When measuring, the signal wire under test passes through the round hole of the transformer, VCC and GND are connected to the DC-30V power supply, VOUT and GND are connected to the oscilloscope, and the potentiometer is adjusted to get the waveform you want. The amplitude of the waveform will follow the measured The increase of the current increases, but the maximum will not exceed 1/2VCC
Shipping list:
5A range single-phase AC active output current transformer module x 1

Module features:
1. Brand new original industrial-grade chip, ultra-long-distance transmission can reach thousands of meters.
2. ESD protection with plus or minus 15KV
3. The chip has a limited slew rate driver to reduce EMI and reduce signal reflection caused by improper terminal matching cables, so that the error-free signal transmission rate is as high as 500Kbps.
4. Receiver input impedance with 1/4 unit load, supports multi-machine communication, and allows connection to the bus with no more than 128 devices.
5. The operating temperature of industrial-grade chips can reach -40°C to 85°C.
6. This module can be hot-swapped, and there will be no signal plugging caused by hot-swapping of other 485 chips.
7. The power supply uses SMD tantalum electrolytic capacitors, and uses double capacitors for high and low frequency power supply filtering
8. Using dual transient suppression diodes, excellent overvoltage protection performance
9. Use 10Ω current protection resistor, patch design to improve 485 signal integrity
10. With terminals and welding lead holes, it is convenient to debug and finalize the wiring, and the welding leads can improve signal reliability
11. All RS485 and TTL signals are routed on one side to ensure signal quality and improve signal integrity
12. Spread copper on a large area to prevent signal interference
13. With 2.54 pitch hole plate welding holes, it is convenient for your secondary development
14. It has M3 screw holes that are quite commonly used at present, which is convenient and reliable to install
15. With 120Ω termination resistance, short-circuit R16 to enable termination resistance
16. With power and RXD, TXD signal indicator lights, you can have a panoramic view of the transceiver status
17. The angled pins are led out for easy testing
18. Support 3.3V and 5V signal control, strong compatibility

This module uses ESP8266-01/ESP-01S as the main control, and DHT11 is the temperature and humidity sensor. ESP8266 collects the temperature and humidity in the environment and uploads them to the server. Support 3.7v-12V DC power supply (3.7V lithium battery). It can be used as a temperature and humidity collection node for smart homes or IoT projects.
Characteristic:
*Main control: ESP-01/ESP-01S (this module does not include ESP-01/ESP-01S)
*Temperature and humidity sensor: DHT11
*Working voltage: DC 3.7V-12V (support 3.7v lithium battery power supply)
*Measuring range: 20-90％RH 0-50℃
*Measurement accuracy: temperature: ±2℃, humidity ±5% RH

This adjustable module adopts the new MP1495 chip, synchronous rectification output, and the power efficiency reaches more than 90% , which is not comparable to similar linear regulated power supplies in the market.
5-18V voltage input, 1.25V 1.5V 1.8V 2.5V 3.3V 5V output, 3A current output, short-circuit point to adjust the output voltage (to avoid the phenomenon of inaccurate voltage in similar potentiometers on the market), the default output voltage is 1.25V. It is suitable for the replacement of small signal power supply maintenance of various LCD TVs, and three wires can handle power supply maintenance.

Product Introduction
Vertical USB female socket with PCB board, you can directly test it when you buy it by soldering it on the line, which is convenient and fast, saving a lot of soldering troubles!
Product parameter
Product name: Vertical USB female adapter board
Size: 25*20.5*1.6mm
Hole distance: 2.54mm
Aperture: 1.0mm
Total height: 15.86mm

TTL to RS485 module RS485 mutual conversion to TTL signal Single chip microcomputer serial port UART lightning protection hardware automatic flow control
This transparent transmission module realizes the mutual conversion of TTL signal and RS485 signal, but everyone must know that 485 is half-duplex communication. This communication method can realize two-way communication, but it cannot be carried out in both directions at the same time. Take turns alternately; that is to say, each segment of the communication channel can be the sender or the receiver, but at the same time, the information can only have one transmission direction.
Realize the automatic flow control of RS485 signal, automatic switching of the sending and receiving direction, using this module is as easy as operating the serial port.
Baud rate: 110~256000bps
Module highlights:
(1) Wide voltage power supply (3.0V~30V), the limit voltage is 33V, it is recommended to use within 30V, and the minimum voltage should be higher than 2.8V.
(2) Compatible with 3.3V and 5.0V signals, both can match the module
(3) It has extremely high EMC and EMI performance.
(4) Strong anti-interference ability, while adopting powerful 485 lightning protection design, working temperature is -40℃ to 85℃.
(5) With wiring terminals and silicone wire, it is very convenient to use.
(6) With RXD, TXD signal indicator
Module features:
(1) This module fully considers the lightning protection design and anti-interference design of the 485 bus, and has extremely high EMC (electromagnetic compatibility) and EMI (electromagnetic anti-interference) performance. When long-distance transmission in the field, connect the "earth" end of the module Connecting to the earth can play a good role in anti-interference and lightning protection, making the 485 bus safer; it is not necessary to connect to the earth during indoor short-distance transmission.
(2) With standard 2.54 pitch pin headers, it is convenient for your secondary development
(3) It has a matching resistance of 120 ohms. Short-circuiting R0 can enable the matching resistance. It is recommended to short-circuit it for long-distance transmission.
(4) Support multi-machine communication, at least 40 nodes can be connected to the same network
(5) It can be hot-swapped, and the signal will not be blocked
(6) Anti-interference wiring and copper laying method to prevent signal interference

XL6009 is a high-performance boost (BOOST) module with 4A switching current. This module uses the second-generation high-frequency switch technology XL6009E1 as the core chip, and its performance far exceeds the first-generation technology LM2577. The XL6009 boost module has a lower cost and better performance, and the LM2577 module is about to be phased out.
● Ultra-wide input voltage 3V~32V, the best working voltage range is 5~32V;
● Ultra-wide output voltage 5V~35V;
● Built-in 4A high-efficiency MOSFET switch tube, making the efficiency up to 94% ; (LM2577 current is the only 3A)
● Ultra-high switching frequency of 400KHz, you can use small-capacity filter capacitors to achieve very good results, with smaller ripple and smaller size. (LM2577 frequency is the only 50KHz)
Technical Parameters:
Model specification

XL6009 Boost Module
Module nature

Non-isolated boost(BOOST)
Input range

3V~32V
Output range

5V~35V
InputCurrent

4A (maximum), no-load 18mA (5V input, 8V output, no-load less than 18mA. The higher the voltage, the greater the no-load current.)
Conversion efficiency

<94% (The greater the pressure difference, the lower the efficiency)
operating frequency

400KHz
Output ripple

50mV (the higher the voltage, the greater the current, the greater the ripple)
Load Regulation

±0.5%
Voltage Regulation

±0.5%
Operating temperature

-40℃~ 85℃
Size

43mm*21mm*14mm
Precautions:
※The conversion efficiency of this module is higher than that of LM2577's triode driving mode
※This module is an adjustable boost module, you can adjust the precision multi-turn adjustable potentiometer on the module
To change the output voltage. The maximum output voltage is 45V. Turn clockwise to step down, and turn clockwise to step up.
※ GND (input negative), IN (input positive), GND (output negative), OUT (output positive) marked on the module
※Working temperature: industrial grade (-45℃~ 85℃) (the ambient temperature exceeds 40 degrees, please reduce the power to use, or strengthen the heat dissipation)

Buzzer 5V (SOT plastic package) active buzzer long sound
Product model: BST-12095-DC-FT
Product introduction: Electromagnetic active buzzer 12095 split pin buzzer
Product size: 12 x 9.5mm
Rated voltage: DC 5V
Sensitivity/SPL: Min 85 dB
Resonance frequency: 2300-2500 ± 300Hz

Fixed 12V
Output current: 3A (peak value) for long-term work, within 0.8A
Conversion efficiency: 96% (peak value) (Vin-Vout≧2V) the smaller the higher the efficiency.
Input voltage: 14V-26V

Output voltage: 12V
Output ripple: <30mV

Working temperature: -40℃～ 85℃
Size: 22. 3mm*17mm

Weight: 3 g
Fixed 9V
Output current: 3A (peak value) for long-term work, within 1.1A
Conversion efficiency: 96% (peak value) (Vin-Vout≧2V) the smaller the higher the efficiency.
Input voltage: 11V~26V

Output voltage: 9V
Output ripple: <30mV

Working temperature: -40℃～ 85℃
Size: 22. 3mm*17mm

Weight: 3 g
Fixed 5V
Output current: 3A (peak value) for long-term work, within 1.6A
Conversion efficiency: 96% (peak value) (Vin-Vout≧2V) the smaller the higher the efficiency.
Input voltage: 7V~26V

Output voltage: 5V
Output ripple: <30mV

Working temperature: -40℃～ 85℃
Size: 22. 3mm*17mm

Weight: 3 g
Fixed 3.3V
Output current: 3A (peak value) for long-term work, within 1.8A
Conversion efficiency: 96% (peak value) (Vin-Vout≧2V) the smaller the higher the efficiency.
Input voltage: 5.3V~26V

Output voltage: 3.3V
Output ripple: <30mV

Working temperature: -40℃～ 85℃
Size: 22. 3mm*17mm

Weight: 3 g

Support application:
LED display communication data
Centralized control of household appliances;
Access control system; all-in-one card;
Various industrial automation; instrumentation;
Parking lot; bus fare;
Canteen meal selling system; employee attendance machine;
Highway toll station; ATM machine;
Support system: WindowsXP, Vista, Windows 7/8/10
The output terminals A (D ) and B (D-) are connected to the device.

Support application:
LED display communication data
Centralized control of household appliances;
Access control system; all-in-one card;
Various industrial automation; instrumentation;
Parking lot; bus fare;
Canteen meal selling system; employee attendance machine;
Highway toll station; ATM machine;
Support system: WindowsXP, Vista, Windows 7/8/10
The output terminals A (D ) and B (D-) are connected to the device.

Support application:
LED display communication data
Centralized control of household appliances;
Access control system; all-in-one card;
Various industrial automation; instrumentation;
Parking lot; bus fare;
Canteen meal selling system; employee attendance machine;
Highway toll station; ATM machine;
Support system: WindowsXP, Vista, Windows 7/8/10
The output terminals A (D ) and B (D-) are connected to the device.