Kereskedelmi, irodai és ipari

Product parameters:
product name:PhotosensitivediodeModule(Digital switch DO output 0/1)    
Product Size:45.50Mm * 14.10mm * 8.50mm(Length x width x height)
color: blue         Product weight: 3.40G (with packaging)
Packing: single module static bag Packaging material: FR4 electronic components
 
Product Dimension:
​product description :
 
  Photodiode moduleThe most sensitive to ambient light intensity, generally used to detect the surrounding environment, brightness and light intensity, in most cases canAnd photosensitive sensor module common, The difference between the two,Photodiode module direction is better, you can sense the fixed direction of the light sourceThe
The sensor module to adapt to the ambient light, the use of photodiode sensor for ambient light detection, the module in the ambient lightNo light orbrightThe threshold can not be set, DO outputHigh level, When the external environmentThe light brightness exceeds the set threshold, DO outputLow level, The operating voltage is 3.3V-5V. The brightness of the sensor can be adjusted by the potentiometer. Photoresistor module is the most sensitive to ambient light, generally used to detect the ambient light intensity, trigger single-chip or relay modules. DO output can directly drive the shop relay module, which can form a light control switch.
 
Product performance:
 
1.whenAmbient lightNo light orThe brightness does not reach the set thresholdWhen DO is lost
OutHigh level, When the external environmentThe light brightness exceeds the set thresholdWhen DO
End outputLow levelTheDetectionbrightnessCan be adjusted by potentiometer,On time
needleAdjust the potentiometer, detectbrightnessincrease;CounterclockwiseAdjust the potentiometer, detectbrightness
cut backThe
2TheComparator output, signal clean, good waveform, drive ability, more than
15mA.
3TheSensor module output port OUT can be directly connected with the microcontroller IO port that is
Yes, you can also drive a 5V relay directly; Connection: VCC-
VCC; GND-GND; OUT-IO
4, can be used 3.3 V-5V DC power supply to the module. When the power supplyTurn on
Time,redThe power light is on;
 
Instructions for use:
 
1TheVCC external 3.3V-5V voltage (can be directly with the 5v microcontrolleror3.3v single-chip connected)
2TheGND External GND
3TheDODigital output interface (0 and 1)
 
4 TheAODigital output interfaceAnalog quantity)

4 strings of 12.8V32650 lithium iron phosphate battery protection board to prevent overcharge and overdischarge 8A working curre

Instructions for use
 
The position of the mounting microcontroller is detailed on the reverse side of the programming socket.
 
ICD2, KIT2, and KIT3 are connected to the programming pad via 5Pin for programming and programming.
 
This writing pad supports the following microcontrollers:
 
PIC16/18XX 40PIN series devices (except 16F59)
 
PIC16/18XX 28PIN Series Devices
 
PIC16/18XX 18PIN Series Devices
 
PIC 8PIN/14PIN/20PIN Series Devices

Description:
Current :13-26mA / DC 3.3V
Idle Current :10-13mA / DC 3.3V
Sleep current: <80uA
Peak current: <30mA
Operating Frequency: 13.56MHz
Supported card types: S50, S70, UltraLight, Pro, Desfire
Product Physical Characteristics: Dimensions: 40mm × 60mm
Environmental Operating temperature: -20-80 degrees Celsius
Environment Storage temperature: -40-85 degrees Celsius
Relative Humidity: 5% -95%
Data Transfer Rate: Max. 10Mbit / s
Package Included:
1 X RFID-RC522 module one;
1 X Standard S50 Blank Card;
1 X S50 shaped cards one (as shown keychain shape);
1 X Straight row pin
1 X Curved row pin
Free shipping MFRC-522 RC522 RFID RF IC card inductive module MFRC 522

Description:
Current :13-26mA / DC 3.3V
Idle Current :10-13mA / DC 3.3V
Sleep current: <80uA
Peak current: <30mA
Operating Frequency: 13.56MHz
Supported card types: S50, S70, UltraLight, Pro, Desfire
Product Physical Characteristics: Dimensions: 40mm × 60mm
Environmental Operating temperature: -20-80 degrees Celsius
Environment Storage temperature: -40-85 degrees Celsius
Relative Humidity: 5% -95%
Data Transfer Rate: Max. 10Mbit / s
Package Included:
1 X RFID-RC522 module one;
1 X Standard S50 Blank Card;
1 X S50 shaped cards one (as shown keychain shape);
1 X Straight row pin
1 X Curved row pin
Free shipping MFRC-522 RC522 RFID RF IC card inductive module MFRC 522

WIFI Bluetooth (ESP-WROOM-32) development board
Cost-effective
Small size, easy to embed into any product
Powerful, support LWIP protocol, freertos
Support three modes: AP, STA, AP STA coexistence mode
Lua programming, allowing you to develop more easily
ESP-WROOM-32 is a universal WiFi-BT-BLE MCU module, powerful, versatile.
    This module is the core ESP32 chip, with scalable, adaptive features. Two CPU cores can be individually controlled or powered on. The clock frequency can be adjusted from 80 MHz to 240 MHz. The user can cut off the power to the CPU and use low-power coprocessors to constantly monitor the state of the peripheral for changes or whether certain analog values exceed the threshold. ESP32 also integrates a wealth of peripherals, including capacitive touch sensors, Hall sensors, low-noise sense amplifiers, SD card interface, Ethernet interface, high-speed SDIO / SPI, UART, I2S and I2C.
     The ESP-WROOM-32 integrates traditional Bluetooth, Bluetooth Low Energy and Wi-Fi for a wide range of uses: Wi-Fi supports a wide range of communication connections, as well as direct connection to the Internet via a router; Bluetooth allows users to connect their phones Or broadcast BLE Beacon for signal detection. The ESP32 chip sleep current is less than 5 A, making it suitable for battery-powered wearable electronic devices. The ESP-WROOM-32 supports data rates up to 150 Mbps and delivers up to 22 dBm output power through a power amplifier for maximum range wireless communication. As a result, the chip has industry-leading specifications and offers the highest performance in terms of high levels of integration, wireless transmission distance, power consumption and network connectivity.
    ESP32's operating system is freeRTOS with LWIP, and built-in TLS 1.2 with hardware acceleration. The chip also supports OTA encryption upgrade, developers can continue to upgrade after the release of the produ

DIY a voltage Regulator, with constant current function, Short-circuit proof, can protect the load.
It can power supply for electronic devices. For a variety of battery charge, can observe the state of charge.
charger for all kinds of batteries, with MPPT function, can enhance the charging current to double. With a constant current and prevents battery overcharge, effective protection of the battery.
It can support high-power LED. As a car power supply, it can for your cell phone or digital products supply.
Output current range: 0.05-5A (The default output current is 3A); Turn lights output range: 0.01-5A (default turn lamp current 0.3A) the current range will be a little difference because the parts parameter error.
colour: blue
Material: metal plastic
Module Name: 5A buck constant voltage constant current MPPT
Module Properties: Non-isolated buck module (BUCK)
Input voltage: 6-36V
Output voltage: 1.25-32V continuously adjustable (the default output 5V)
MPPT voltage setting range: 6-36V
Display: none
Operating temperature: -40 ~ 85 degree
Operating frequency: 180KHz
Conversion efficiency: up to 95% (efficiency, input & output voltage, current and pressure-related)
Short circuit protection: Yes
Over temperature protection: (automatically shut off the output after overtemperature)
Input reverse polarity protection: None, (if necessary, please add the string into the diode)
Output anti-anti-irrigation protection: no, the output must be connected to the battery plus blocking diode, otherwise it will burn the module!
Charging indicator: charging red, bright green when fully charged. Turn lamp is the output current detection.
Installation: 4 pcs 3mm screws
Connection: IN is the input, OUT is output
Module dimensions: 60 x 31 x 22 mm(without meter)
Note: Detection module, please do not direct connect the output of negative electrode and the input o

Product description:
Parameter:
Chip: TPA3110
Condition:XH-A232
Application:Computer
Supply Voltage:DC8V-26V
Dissipation Power:30W 30W
Size:53*45*14mm
Channels:2 (2.0)
Output impedance:4-8ohm
Current: more than 3A
Signal to noise ratio: 100db
Weight:21g
Package Included:
1PC TPA3110 Digital Power Audio Amplifier Board
Product description:
Parameter: Chip: TPA3110 Condition:XH-A232 Application:Computer Supply Voltage:DC8V-26V Dissipation Power:30W 30W Size:53*45*14mm Channels:2 (2.0) Output impedance:4-8ohm Current: more than 3A Signal to noise ratio: 100db Weight:21g

This price does not contain the ESP8266 WIFI module, only the conversion floor!!!

1 row 4 key membrane switch/matrix keyboard/film/control panel/SCM extended keyboard

All color have pin.
Descriptions:
The VL53L0X from ST Microelectronics is a time-of-flight ranging system integrated into a compact module. This board is a carrier for the VL53L0X, so we recommend careful reading of the VL53L0X datasheet (1MB pdf) before using this product.
The VL53L0 uses ST's FlightSense technology to precisely measure how long it takes for emitted pulses of infrared laser light to reach the nearest object and be reflected back to a detector, so it can be considered a tiny, self-contained lidar system. This time-of-flight (TOF) measurement enables it to accurately determine the absolute distance to a target without the object's reflectance greatly influencing the measurement. The sensor can report distances of up to 2 m (6.6 ft) with 1 mm resolution, but its effective range and accuracy (noise) depend heavily on ambient conditions and target characteristics like reflectance and size, as well as the sensor configuration. (The sensor's accuracy is specified to range from ±3% at best to over ±10% in less optimal conditions.)
Ranging measurements are available through the sensor's  I 2 C  (TWI) interface, which is also used to configure sensor settings, and the sensor provides two additional pins: a shutdown input and an interrupt output.
The VL53L0X is a great IC, but its small, leadless, LGA package makes it difficult for the typical student or hobbyist to use. It also operates at a recommended voltage of 2.8 V, which can make interfacing difficult for microcontrollers operating at 3.3 V or 5 V. Our breakout board addresses these issues, making it easier to get started using the sensor, while keeping the overall size as small as possible.
PIN     Description
VDD  Regulated 2.8 V output. Almost 150 mA is available to power external components. (If you want to bypass the internal regulator, you can instead use this pin as a 2.8 V input with VIN disconnected.)
VIN  This is the main 2.6 V to 5.5 V power supply connection. The SCL and SDA level shifters pull the I 2 C lines high to this level.
GND  The ground (0 V) connection for your power supply. Your  I 2 C  control source must also share a common ground with this board.
SDA    Level-shifted I 2 C data line: HIGH is VIN, LOW is 0 V
SCL      Level-shifted I 2 C clock line: HIGH is VIN, LOW is 0 V
XSHUT    This pin is an active-low shutdown input; the board pulls it up to VDD to enable the sensor by default. Driving this pin low puts the sensor into hardware standby. This input is not level-shifted. 

All color have pin.
Descriptions:
The VL53L0X from ST Microelectronics is a time-of-flight ranging system integrated into a compact module. This board is a carrier for the VL53L0X, so we recommend careful reading of the VL53L0X datasheet (1MB pdf) before using this product.
The VL53L0 uses ST's FlightSense technology to precisely measure how long it takes for emitted pulses of infrared laser light to reach the nearest object and be reflected back to a detector, so it can be considered a tiny, self-contained lidar system. This time-of-flight (TOF) measurement enables it to accurately determine the absolute distance to a target without the object's reflectance greatly influencing the measurement. The sensor can report distances of up to 2 m (6.6 ft) with 1 mm resolution, but its effective range and accuracy (noise) depend heavily on ambient conditions and target characteristics like reflectance and size, as well as the sensor configuration. (The sensor's accuracy is specified to range from ±3% at best to over ±10% in less optimal conditions.)
Ranging measurements are available through the sensor's  I 2 C  (TWI) interface, which is also used to configure sensor settings, and the sensor provides two additional pins: a shutdown input and an interrupt output.
The VL53L0X is a great IC, but its small, leadless, LGA package makes it difficult for the typical student or hobbyist to use. It also operates at a recommended voltage of 2.8 V, which can make interfacing difficult for microcontrollers operating at 3.3 V or 5 V. Our breakout board addresses these issues, making it easier to get started using the sensor, while keeping the overall size as small as possible.
PIN     Description
VDD  Regulated 2.8 V output. Almost 150 mA is available to power external components. (If you want to bypass the internal regulator, you can instead use this pin as a 2.8 V input with VIN disconnected.)
VIN  This is the main 2.6 V to 5.5 V power supply connection. The SCL and SDA level shifters pull the I 2 C lines high to this level.
GND  The ground (0 V) connection for your power supply. Your  I 2 C  control source must also share a common ground with this board.
SDA    Level-shifted I 2 C data line: HIGH is VIN, LOW is 0 V
SCL      Level-shifted I 2 C clock line: HIGH is VIN, LOW is 0 V
XSHUT    This pin is an active-low shutdown input; the board pulls it up to VDD to enable the sensor by default. Driving this pin low puts the sensor into hardware standby. This input is not level-shifted. 

All color have pin.
Descriptions:
The VL53L0X from ST Microelectronics is a time-of-flight ranging system integrated into a compact module. This board is a carrier for the VL53L0X, so we recommend careful reading of the VL53L0X datasheet (1MB pdf) before using this product.
The VL53L0 uses ST's FlightSense technology to precisely measure how long it takes for emitted pulses of infrared laser light to reach the nearest object and be reflected back to a detector, so it can be considered a tiny, self-contained lidar system. This time-of-flight (TOF) measurement enables it to accurately determine the absolute distance to a target without the object's reflectance greatly influencing the measurement. The sensor can report distances of up to 2 m (6.6 ft) with 1 mm resolution, but its effective range and accuracy (noise) depend heavily on ambient conditions and target characteristics like reflectance and size, as well as the sensor configuration. (The sensor's accuracy is specified to range from ±3% at best to over ±10% in less optimal conditions.)
Ranging measurements are available through the sensor's  I 2 C  (TWI) interface, which is also used to configure sensor settings, and the sensor provides two additional pins: a shutdown input and an interrupt output.
The VL53L0X is a great IC, but its small, leadless, LGA package makes it difficult for the typical student or hobbyist to use. It also operates at a recommended voltage of 2.8 V, which can make interfacing difficult for microcontrollers operating at 3.3 V or 5 V. Our breakout board addresses these issues, making it easier to get started using the sensor, while keeping the overall size as small as possible.
PIN     Description
VDD  Regulated 2.8 V output. Almost 150 mA is available to power external components. (If you want to bypass the internal regulator, you can instead use this pin as a 2.8 V input with VIN disconnected.)
VIN  This is the main 2.6 V to 5.5 V power supply connection. The SCL and SDA level shifters pull the I 2 C lines high to this level.
GND  The ground (0 V) connection for your power supply. Your  I 2 C  control source must also share a common ground with this board.
SDA    Level-shifted I 2 C data line: HIGH is VIN, LOW is 0 V
SCL      Level-shifted I 2 C clock line: HIGH is VIN, LOW is 0 V
XSHUT    This pin is an active-low shutdown input; the board pulls it up to VDD to enable the sensor by default. Driving this pin low puts the sensor into hardware standby. This input is not level-shifted. 

Description:
SX1308 booster module carrying SX1308 chip, its packagnig is small, and high efficiency. The output power can be adjust, maximum can arrive 28V and its interior integrate the lowest RDS internal resistance 100mΩ metal oxide semiconductor field effect transistor (mosfet), which can realize large current output of up to 2A. It widely used in 3G network products, digital products, mobile power supply,battery power supply, equipment, etc.
 Features:
Oscillation frequency 1.2MHz
efficiency is as high as 95%
Circuit has short circuit protection, overheating protection function
10k to adjust potentiometer, adjust the output voltage
 
Parameters:
Maximum input voltage: DC 2-24V
Maximum output voltage: DC 2-28V
Switching frequency: 1.2MHz
Maximum current output: 2A
Note : any questions, turn the potentiometer in one direction more than 10 rotations for try

SWD TO JTAG Adapter Board For STM32

Parameter:
Size: 18.5*16mm
Input voltage: 3-10V
Single H bridge output current: 1.5A, can drive 2 DC motor.
Built in overcurrent protection, short circuit protection, under voltage lockout and over temperature protection. Low power sleep mode.
Uses: can drive the following 1.5A DC motor and 4 wire stepper motor.
Instructions:
ULT low level for sleep mode (need to disconnect the module after the J2 solder joints)
OUT1,0UT2 for the 1 H bridge, the corresponding control for IN1, IN2.
OUT3,0UT4 for the second H bridge, the corresponding control for IN3, IN4.
EEP to protect the output, the default is not.
VCC input voltage 3V-10V.
GND grounding.

Specification:
Size: 34mmX34mm
Internal 1000 Ohm half-bridge strain gauge load cell, range is 50kg, half-bridge structure.
When measuring, the correct force is applied to the outer side of the strain E-shaped beam portion of the sensor (i.e., a strain gauge affixed to the middle, with a beam of white plastic cover arm) and the outside edges to form a shear force in the opposite direction, i.e., in the middle of strain beam bending necessary changes can occur under stress, strain beam side by another force can not have a barrier.
The sensor use the following three methods:
1, using a sensor with external resistors full bridge measurement range of a sensor range: 50kg. Higher requirements for external resistor
2, the use of only two full-bridge sensors measuring range is the range of the two sensors and: 50kgx2 = 100kg
3, the use of four full-bridge sensors measuring range is the range of four sensors and: 50kgx4 = 200kg

1PCS GY-521 MPU-6050 MPU6050 Module 3 Axis analog gyro sensors 3 Axis Accelerometer Module.We are the manufacturer
 
 
Product description:
Use the chip: MPU-6050
Power supply :3-5v (internal low dropout regulator)
Communication modes: standard IIC communications protocol
Chip built-in 16bit AD converter, 16-bit data output
Gyroscope range: ± 250 500 1000 2000 ° / s
Acceleration range: ± 2 ± 4 ± 8 ± 16g
Immersion Gold PCB machine welding process to ensure quality
Pin pitch 2.54mm
Package Included: 
1pcs  X  GY-521 MPU-6050 Module
 

GPS module antenna GPS built-in active antenna gps positioning antenna 25x25x8mm with IPEX connector

Model: HC-SR04
- Color: Blue Silver
- Working voltage : 5V(DC)
- Static current: Less than 2mA.
- Output signal: Electric frequency signal, high level 5V, low level 0V.
- Sensor angle: Not more than 15 degrees.
- Detection distance: 2cm~450cm.
- High precision: Up to 3mm
- Mode of connection: VCC / trig(T) / echo(R) / GND
- Module Working Principle:
- Adopt IO trigger through supplying at least 10us sequence of high level signal
- The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal
- If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving
Datasheet:  http://m5.img.dxcdn.com/CDDriver/CD/sku.133696.pdf
Download Link:  http://www.ic5188.com/PDF/HC-SR04.rar

MOSFET is an electronic devices with good switching characteristics. It is widely used in circuits, such as power supplies switching ,motor drives, lighting dimmer and so on. Relay is another kind of module with switching characteristics. Since relay works relying on mechanical contacts to open or shut. In this way it s will inevitably lead to relay's stopping working while switching time is too short. And papa sound made by relay in some situations is annoying.
We designed a 4-channel MOSFET switch. It can supply up to four groups of electronic switches to control different circuit blocks respectively. Limited by the working priciples, MOSFET can only be used to control the DC circuit, such as DC-LED screen and so on, but not suitable for AC circuit control.
In some extreme cases,It can be used to control 100V/33A DC circuit. However, it is suggested that the controlled DC voltage is more than 9V.
Shipping Included:
1PCS*For 4 Route MOSFET Button IRF540 V4.0

Features:
DFPlayer Mini is a compact and inexpensive MP3 module can be connected directly to the speaker. Module with battery power supply, speaker, keypad can be used alone, or through the serial port control, as the for Arduino UNO or any microcontroller with a serial port module. The module itself perfectly integrated hardware decode MP3, WAV, WMA's. While the software supports TF card driver to support FAT16, FAT32 file system. Can be done by simple serial command plays the specified music, as well as how to play music and other functions, without tedious low-level, easy to use, stable and reliable.
Technical Specifications
1, supports sampling rates (KHz): 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48
2,24-bit DAC output, dynamic range support: 90dB, SNR support: 85dB
3, fully supports FAT16, FAT32 file system, maximum support 32G TF card, support U disk to 32G, 64M bytes of NORFLASH
4, a variety of control modes are available. IO control mode, serial mode, AD key control mode
5, the broadcast language spots feature, you can pause the background music being played. Advertising finished playing back background sound to continue playing
6, the audio data is sorted by folder, supports up to 100 folders, folders can assign every 255 Tracks
7,30 level adjustable volume, adjustable EQ 6
Application
1, car navigation voice broadcast
2, road transport inspectors, toll voice prompts
3, train station, bus station voice prompts security check
4, electric power, telecommunications, financial operating room voice prompts
5, the vehicle into or out of the channel to verify the voice prompts
6, border control channel voice prompts **
7, multi-channel voice alarm or voice guidance equipment operation
8, electric sightseeing bus safety with voice notices
9, electrical and mechanical equipment failure alarm
10, fire alarm voice prompts
11, automatic broadcasting equipment, regular broadcast
Package Included:
Open source Mini MP3 Player mini player module board

KWS-V21 gray shell
KWS-A16 tester manual download: KWS-MX16 tester manual download:
Link: https://pan.baidu.com/s/1W9cZK-k2lKUL4wuhjkFYOQ
Extraction code: 1234
After copying this content, open the Baidu Netdisk mobile app, which is more convenient.
If the USB voltage and current detector does not have a suitable load and only relies on non-constant power appliances such as mobile phones, it will not be able to measure the maximum output capacity of the power supply or whether it reaches the nominal current! However, it can be said that it is almost impossible for customers to find a constant power load of 1A or 2A in daily electrical appliances! In order to meet the needs of our customers, our store has customized a load tester (that is, an aging device) that can be rated for 1A or 2A discharge, and the two can be used to accurately and intuitively judge whether the output capacity of the power supply/mobile power supply is qualified!

Multi-function adapter board
The interfaces provided by the multi-function adapter board are as follows:
Interface 1: 2.54 pitch 20-pin corner socket X 1 (can be directly connected to the JTAG socket)
Interface 2: 2.54 pitch 20-pin straight socket X 1
Interface 3: 2.0 pitch 20-pin straight socket X 1
Interface 4: 2.54 pitch 14-pin straight socket X 1
Interface 5: 2.54 pitch 10-pin straight socket X 1
Interface 6: 2.0 pitch 10-pin straight socket X 1
Interface 7: 2.54 pitch 6-pin straight socket X 1
Interface 8: 2.54 pitch 4-pin straight socket X 1
Schematic 1:

Features:
Motherboard comes with protection function: Charging overcharge protection,
over-discharge protection, overcurrent protection.
Intelligent output device after charging full, automatically stop charging,
to prevent mobile phones overcharge.
Output voltage and current stable, will not harm user devices.
Specifications:
Micro USB input: 5V 1A
USB Output: 5V 2.1A / 5V 1A(Dual USB interface)
Charging display: intelligent digital display
Batteries Type: liquid lithium-ion batteries (18650)
Product Size: 57mm x 28mm
Screen size:27mm x 17mm
Installation instructions:
The circuit board is connected to the battery negative B-, B is the positive, do not
connecting reversed, connecting reversed will burn the board, the battery is connected
in parallel welding, assembling battery. Note that the insulation between the battery and the
circuit board, battery lead not to touch the circuit board, so as not to cause a short circuit.
Package included:
1x Mobile Power Bank 18650 Battery Charger PCB

ULN2003 Stepper Motor Driver Board Module For Arduino AVR SMD Five-wire four-phase stepper motor drive board
Description:
ULN2003 is a high voltage and high current Darlington transistor array products with high current gain, high operating voltage, wide temperature range, with a strong load capacity and other characteristics, adapted to the requirements of various types of high-speed high-power drive system. ULN2003A circuit is the United States Texas Instruments and Sprague company developed high-voltage high-current Darlington transistor array circuit, the paper describes its circuit structure, characteristic parameters and typical applications.
Features:
1. Using ULN2003 high-power Darlington chip-driven stepper motor
2. Increased output expansion interface.
3.A, B, C, D light-emitting diode instructions four-phase stepper motor work with the state of the standard stepper motor interface, can be used directly plug.

TCS3472 devices available in red, green and blue (RGB) and digital Mingguang induction return value. Color sensitive photodiode integrated sheet cutting and localized infrared light blocking filter, minimizing the infrared spectral components of the incident light, so that more accurate color management. High sensitivity, wide dynamic range and an infrared light blocking filter makes TCS3472 become ideal lighting conditions change and through color sensitive element attenuating materials under conditions of solution.

30W high-power class D digital mono power amplifier board, using original power amplifier chip, low noise, with mute function, wide working voltage, can be adapted to 300W speaker.
Parameter:
Work Voltage:DC 8V-24V
Work Mode:Class D
Channel:Mono 
Input:Audio input
Output Power:
Output power 30W at 16V 4ohm
Output power 20W at 12V 4ohm
Output power 10W at 12V 8ohm
Output power 15W at 16V 8ohm
Output power 25W at 24V 8ohm
Match speaker(30W~300W):
4ohm at 8V~16V; 8.2>.8ohm at 8V~24V
Adapter speaker: 30W~300W
Instructions for use
      Ensure that the input source signal is between 0.5V and 1.5V. It is recommended that the power supply voltage be DC 8~24V, 2A or more, more than 26V, the chip will burn out, and there will be noise below 8V.
The power supply does not exceed 12V when connected to a 4Ω speaker, and the power supply does not exceed 24V when connected to an 8 ohm speaker. It is recommended to use the rated power of the speaker at 30W or above to avoid the burning of the speaker, and the speaker cable should not be too long to ensure that it is suitable within 1 meter.
Precautions:
     Pay attention to static electricity protection. Before touching the power amplifier board, discharge the static electricity on your hand to avoid static electricity from penetrating the power amplifier chip. The digital power amplifier is sensitive to static electricity. The positive and negative poles of the power supply cannot be reversed, and the reverse chip is burned. This module is only suitable for single-supply operation and cannot be connected to a negative power supply.

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TDA8932 35W mono digital amplifier module
The board uses a high-performance digital amplifier TDA8932 chip, a small size, high efficiency, high power, good sound quality, without additional installation of radiator, very suitable for the transformation of active speakers, electro-acoustic project implementation, product development and other audio applications.
Product Description:
Operating voltage: single DC10 ~ 30V, 24V recommended voltage, current above 2A Switching Power Supply
Output power: 35w * 1
Speaker Impedance: 4-8 ohm, 8 ohm best
Circuit configuration: Mono BTL output
PCB board size: 45 * 31MM

Operating voltage: DC4.5V-35V Output current: 0-5A Output power: 90W (max) Quiescent current: 7uA (standby) PWM duty cycle: 1% -100% PWM frequency: 20khz Size: 30mm x 26mm x 14mm (Without Handle) Precautions: DC motor governor input is DC, can not directly connected to the AC (for example: home 220V AC), otherwise it will burn! DC power supply positive and negative terminals do not reverse, otherwise the governor may be damaged. The motor can be positive or negative, when the direction of operation and expectations do not match, you can adjust the line order to change the direction. Adjust the potentiometer knob to change the governor output duty cycle, the motor speed changes.

OO2_
 
   100% Brand new and high quality
 
   Good Quality button
 
   Expanded development application modules
 
   4x4 Matrix
 
   Keypad Keyboard module 16 Button
 
   Size: Approx.42mmX42mm / 1.65x1.65
 
OO5_
 
   1×4x4 Matrix 16 Keypad Keyboard Module