Kereskedelmi, irodai és ipari

Product Introduction
The commonly used TDS testing equipment is a TDS pen. Although it is cheap and easy to use, it cannot transmit data to the control system, perform long-term online monitoring, and use special instruments for water quality analysis. Although it can transmit data, the accuracy is also low. High, but the price is very expensive. To this end, we have specially introduced an arduino-compatible TDS sensor, which can be used to measure the TDS value of water after it is connected to the arduino controller.
This product is specially designed for arduinoi, plug and play, easy to use. Wide voltage power supply of 3.3~5.5V and analog signal output of 0~2.3V make this product compatible with 5 and 3.3V control systems and can be easily connected to existing control systems for use. The excitation source for measurement adopts cross signal, which can effectively prevent probe polarization, extend the life of the probe, and increase the stability of the output signal. The DS probe is a waterproof probe that can be immersed in water for long-term measurement.
The product can be applied to water quality measurement in domestic water, hydroponics and other fields. With this sensor, you can easily DIY a TDS detector, easily detect the cleanliness of the water, and check your water quality.
Arduino TDS sensor connection diagram
Technical specifications:
Signal transfer board:
Input voltage: 3.3~5.5V
Output signal: 0~2.3V
Working current: 3~6mA
TDS measurement range: 0~1000ppm
TDS measurement accuracy: ±10% F.S. (25°C)
Size: 42*32mm
Module interface: PH2.0-3P
Electrode interface: XH2.54-2P
TDS probe:
Number of probes: 2
Overall length: 83cm
Connection interface: XH2.54-2P
color: White
Other: Waterproof probe
Delivery list:
TDS signal adapter board*1
Waterproof TDS probe*1
Gravity 3PIN analog sensor cable*1
Note:
The TDS probe cannot be used in water above 55°C.
The TDS probe should not be placed too close to the edge of the container, otherwise it will affect the display.
The TDS probe head and wire are waterproof and can be immersed in water, but the wire interface and the signal adapter board are not waterproof, please pay attention to use.

WiFi for arduino UNO ESP8266 Development board
ISM:2.4GHz
PA: 25dBm
Size(L*W*H):70 x 60 x 20 mm
Scope of application:
1.Remote control aircraft electrical/model/four axis, etc
2.For the smart devices provide networking services
3.Household temperature/humidity/PM2.5 monitor, etc
4.Intelligent switch etc.
Features:
1.Onboard four LED displays the status of ESP8266,
namely PWR, DFU,  STA
2.Use stackable design,
it can continue to accumulate above the other modules, easy to use.
3.Onboard ESP8266-12 stable industrial grade
WiFi module with a metal shield, immunity to interference.
4.Built-in 5V to 3.3V TTL level converter to prevent high-pressure for arduino TTL level of the WiFi module damage.
5.Onboard ESP8266-12 stable industrial grade serial WiFi module,
using an enhanced PCB antenna, signal better.
6.It leads to a WiFi module power supply /
service interface to facilitate developers to extend the power supply and maintenance.
7.Onboard ESP8266-12 standard pitch leads to a stable industrial grade
WiFi module all interfaces, enabling developers to easily develop deep.
8.Standard pin interface to achieve full compatibility with the pitch for arduino Uno, Mega and so on.
(Unless the standard size for arduino, such as for Nano, Mini)
9.You can quickly switch DIP switch ESP8266-12 industrial grade WiFi stable operation mode
(such as operating mode and upgrade mode) module, integrated serial chip, quickly flashing the firmware.
10.3.3V power supply using advanced chip (with the official expansion board power chip CC3000 same),
so 3.3V for arduino board provided more accurate,
so ESP8266 as official cc3000 chip work as normal, there is no gap.
Package Included:
1 x Development Board
Note:
Manual measuring, please allow 1 ~ 2 cm error,thank you.

Product features:
USB TO SERIAL CONVERTER CALBE communicates with different communication devices through the USB port, such as PC-PC, PC-digital camera, PC-PDA. Development boards, STC downloads, and LED control cards are all supported, as well as USB1.1 and USB2.0. Among them, CH340 is a USB-serial conversion chip, which is very suitable for short-distance USB and PC interface instead of RS232 conversion, making the connection between PC and peripherals faster and more concise. It is an ideal choice for mobile systems and embedded systems, and its small package can be embedded in any connectors and handheld devices. This series of chips has very low power consumption in working mode and sleep mode, which is very suitable for bus-powered occasions.
Support system: CH340 WIN2000. XP. WIN7/WIN8 vista WIN10
Packing list: converter*1

Product parameter
Product name

CS8416 CS434 Coaxial & Optical Audio Decoding Board Module
Operating Voltage

5~12V
Receiving range

16~24Bit 32K~192KHz
Signal-to-noise ratio

>105DB
Dynamic Range

>105DB
THD N

-90DB
Output audio

RCA interface
Size

45*37.5*22 mm
weight

30g
Applications

Personal computer,soundcard,Blu-ray DVD,networkset-topbox,high-end musical instrument,etc.

Working parameters:
Pyroelectric human body infrared sensor module, model: SR-602
Sensing distance: up to 5 meters; recommended 0-3.5M.
Output: high level, H=3.3V, L=0V
Power supply DC: 3.3V-15V
Quiescent current: 20uA
Features and uses:
This module has high sensitivity, fast response, small static power consumption, small size, easy to install, and is installed.
The lens, the pin header has been soldered, and the power supply is provided without debugging. Can be used for body sensor lights, alarms, security,
Access control on-demand imaging, automatic equipment for agriculture, forestry and mining.
Key points:
1. The high level time of the output of this product is adjustable, 2.5 seconds to 1 hour, the output time set at the factory.
It is 2.5 seconds, and you can change one chip resistor if you need to change it. Please read the resistance value corresponding to the typical delay time.
Refer to the relevant form below.
2. Blocking time, 2 seconds, not adjustable.
3. The factory is defined as repeatable trigger and cannot be changed.
4. The supply voltage of this module is 3.3V to 15V, and the limit voltage is 2.8V to 18V.
5. Module output timing is: output high level for 2 seconds after power-on, then go low, enter standby
status. If the delay time is changed, the time when the module outputs a high level after power-on will increase accordingly, which can be understood as
The startup time after entering the normal working state after the electric power will increase.
6. After installing the photosensitive element, it does not work during the day, work at night, does not contain photosensitive components, and works all day ( There are no photodiodes on the module,please purchase separately if needed. Recommended: ordinary F3 photodiode )
It is considered that there is no photosensitive element installed.
7. This module is very sensitive, pay attention to the installation position, try to avoid the heat source radiation source (air outlet / direct sunlight)
8. The sensitivity of this module is adjustable, and you need to change a chip resistor. Please read the relevant table below for details.
grid.
9. When soldering with 220V ordinary soldering iron, it is necessary to unplug the power supply before welding. It is recommended to use
24V low voltage soldering iron, such as domestic white light 936.

Shipping list:
HR4988 module, 1 piece
Heat sink, 1 piece
Product introduction:
HR4988 is an easy-to-use micro-stepping motor driver with an integrated decoder. It is designed to enable bipolar stepping motors to work in full, half, 1/4, 1/8, and 1/16 stepping modes. The step mode is selected by the logic input MSx. The output drive capacity reaches 38V and ±2A. HR4988 contains a fixed decay time current regulator that works in slow decay or mixed decay mode.
Features:
●Low on-resistance RDS(ON)
●Automatically detect and select current attenuation mode
● Support slow decay and mixed decay modes
●Synchronous rectification function to reduce power consumption
●Internal Undervoltage lockout
●Overcurrent protection
●Compatible with 3.3V and 5V logic levels
●Overheating shutdown circuit
●Short circuit protection to ground
●Load short circuit protection
●Support up to 16 subdivisions
Instructions for use
1. The pin headers are installed on the same side as the chip, so the definition of the motherboard header pin sequence is required;
2. MS3 pin header definition, replace with VR, you need to set VR reference voltage on the bottom board
3. SLEEP, RESET, there are 10k pull-up resistors on the small board
4. The upper limit current resistance of the small plate is 0.27 ohms, and the current calculation formula is I=VR/(8*0.27)
5. The heat sink can be attached to the exposed copper on the front
6. VBB voltage: 8~38V.
7. VDD voltage: 3~5.5V.
8. Iout output maximum current: 2A
9.Maximum power consumption of the module: 8mA
10. Logic input pin level: 0~5V
11. VR pin level: 0.5~4V

FEATURES DESCRIPTION
23• ULTRA-SMALL QFN PACKAGE: The ADS1113, ADS1114, and ADS1115 are
2mm × 1,5mm × 0,4mm precision analog-to-digital converters (ADCs) with 16
• WIDE SUPPLY RANGE: 2.0V to 5.5V bits of resolution offered in an ultra-small, leadless
• LOW CURRENT CONSUMPTION: QFN-10 package or an MSOP-10 package. The ADS1113/4/5 are designed with precision, power, and
Continuous Mode: Only 150μA ease of implementation in mind. The ADS1113/4/5
Single-Shot Mode: Auto Shut-Down feature an onboard reference and oscillator. Data are
• PROGRAMMABLE DATA RATE: transferred via an I2C-compatible serial interface; four
8SPS to 860SPS I2C slave addresses can be selected. The
• INTERNAL LOW-DRIFT ADS1113/4/5 operate from a single power supply
VOLTAGE REFERENCE ranging from 2.0V to 5.5V.
• INTERNAL OSCILLATOR The ADS1113/4/5 can perform conversions at rates
• INTERNAL PGA up to 860 samples per second (SPS). An onboard PGA is available on the ADS1114 and ADS1115 that
• I2C™ INTERFACE: Pin-Selectable Addresses offers input ranges from the supply to as low as
• FOUR SINGLE-ENDED OR TWO ±256mV, allowing both large and small signals to be
DIFFERENTIAL INPUTS (ADS1115) measured with high resolution. The ADS1115 also
features an input multiplexer (MUX) that provides two • PROGRAMMABLE COMPARATOR differential or four single-ended inputs.
(ADS1114 and ADS1115)
The ADS1113/4/5 operate either in continuous
APPLICATIONS conversion mode or a single-shot mode that
• PORTABLE INSTRUMENTATION automatically powers down after a conversion and greatly reduces current consumption during idle
• CONSUMER GOODS periods. The ADS1113/4/5 are specified from –40°C
• BATTERY MONITORING to 125°C.

Product Features
Low-power dual-core 32-bit CPU for application processors
Main frequency up to 240MHz, computing power up to 600 DMIPS
Built-in 520 KB SRAM, external 4M PSRAM
Supports interfaces such as UART/SPI/I2C/PWM/ADC/DAC
Support OV2640 and OV7670 cameras, built-in flash
Support image WiFi upload
Support TF card
Support multiple sleep modes
Embedded Lwip and FreeRTOS
Support STA/AP/STA AP working mode
Support Smart Config/AirKiss one-click distribution network
Support secondary development
Product Parameter

Support Win8, Win7, WinXp, Win2K, WinCE, Linux, Mac, system, 32-bit, 64-bit system, driver support
In embedded applications, the serial port is a widely used communication peripheral, but embedded engineers are inevitably troubled by the various level standards and voltages of the serial port. Due to historical reasons, TTL level interfaces, RS232 level interfaces, and RS485 level interfaces have been formed. Different interfaces have their own characteristics, and the preferred interface of the device is also different. It is to be an easy-to-use debugging module for embedded engineers, with full coverage of all level conversions. It is a downloader for your development and debugging!
A top 6 high-end USB serial port module! Compatible with 3.3V and 5V levels. Spend the money of one module and buy the functions of 6 modules!

Si5351A Clock Generator Signal Generator Clock 8KHz-160MHz

VL53L0X V2 Laser Ranging Sensor Module
VL53L0X time-of-flight ranging sensor is a new generation of laser ranging module, VL53LOX is a fully integrated sensor, equipped with embedded infrared, eye-safe laser, advanced filters and ultra-high-speed photon detection array, measurement distance is longer, speed and The accuracy is higher.
The sensing capabilities of VL53L0X can support various functions, including gesture sensing or proximity detection of various innovative user interfaces, obstacle detection and collision avoidance systems for sweeping robots and service robots, home appliances sensing panels, and the presence of users of laptops Detection or power switch monitors, as well as drones and Internet of Things (IoT) products, etc.
Product parameter
1. Working voltage: 3～5V
2. Communication method: IIC
3. Measuring absolute distance: 2m
4. Xshutdown (reset)/GPIO (interrupt)
5. Size 25MM*10MM
Optical cover sheet description: The optical cover sheet is equipped with VL53L0X V2 to measure more accurately, and it also protects the sensor and prolongs the service life of the sensor. Customers can choose it by themselves.

VL53L0X V2 Laser Ranging Sensor Module
VL53L0X time-of-flight ranging sensor is a new generation of laser ranging module, VL53LOX is a fully integrated sensor, equipped with embedded infrared, eye-safe laser, advanced filters and ultra-high-speed photon detection array, measurement distance is longer, speed and The accuracy is higher.
The sensing capabilities of VL53L0X can support various functions, including gesture sensing or proximity detection of various innovative user interfaces, obstacle detection and collision avoidance systems for sweeping robots and service robots, home appliances sensing panels, and the presence of users of laptops Detection or power switch monitors, as well as drones and Internet of Things (IoT) products, etc.
Product parameter
1. Working voltage: 3～5V
2. Communication method: IIC
3. Measuring absolute distance: 2m
4. Xshutdown (reset)/GPIO (interrupt)
5. Size 25MM*10MM
Optical cover sheet description: The optical cover sheet is equipped with VL53L0X V2 to measure more accurately, and it also protects the sensor and prolongs the service life of the sensor. Customers can choose it by themselves.

Product Introduction
This product is an ARM-Cortex-M0 core board based on the STM32F030R8T6 chip.
1. The core board provides the most basic circuit for the normal operation of the STM32F030R8T6 chip, including external high-speed crystal oscillator (8MHz) circuit, power management circuit (ME6211C33M5G), debug interface (SWD mode), BOOT selection circuit, etc.
2. This core board provides close to all available port resources, including all I/O port resources except PF0, reset I/O port resources, B00T selection port resources, etc.;
3. The core board provides a power monitoring LED (PWR_ LED) and a chip running indicator (with the PC13 pin control in STM32F030R8T6, if the pin is short, you need to use the PC13 pin, just disconnect the PC13_ LED);
4. Power supply mode:
1. You can choose to supply power through the core board. The onboard USB-Micro interface;
2. Connect to the SWD interface through the debugging device for power supply (2.7V-3.6V);
3. Connect to the port corresponding to the silk screen 5V (5V-12V) through the external power supply;
4. It is not recommended to use multiple power supply methods at the same time. Cross power supply may easily cause the core board or debugger to short-circuit and burn
5. In order to save the volume of the core board, the core board provides an SWD program download/debugging interface, and supports the SW mode of JLINK, ST-LINK, DAPLINK and other common debuggers for debugging and program download;
6. The core board provides the RTC clock crystal oscillator, and the power interface required by the RTC is led out (the core board silk screen layer "VBAT" corresponds to the pin);
7. The core board provides a reset button for users to conveniently reset during device debugging (in addition, the reset pin is also drawn, and the core board silk screen layer "R" corresponds to the pin)
8. The core advantage of the core board is to provide users with the needs of rapid project deployment and as many internal chip resources as possible. Therefore, we did not add any modules on the core board that users may not use and users seize resources to truly experience the core board. The "core" value.
9. All pins of the core board are led out through 2.54mm pitch row holes. The corresponding 2.54mm header pins are provided free of charge. The B0OT selection pins and the SWD program download/debugging interface have been soldered by default;

Industrial grade TTL to RS232 module, using original SP3232 chip
The main purpose:
1: MCUs such as single-chip microcomputer and ARM communicate with the computer through the serial port (COM port) of the computer
2: Radio modification, mobile phone flashing, XBOX360 flashing, GPS, car inspection, DVD flashing, hard disk repair, set-top box upgrade
3: Serial port expansion of the device
Instructions for use: (taking access to the MCU as an example, explain how to connect each row of pins)
VCC: Connect to DC 3V-5.5V
GND: connect to GND
TXD: connect to MCU.RX (signal flow: MCU.RX << SP3232 << PC.TX )
RXD: connect to MCU.TX (signal flow: MCU.TX >> SP3232 >> PC.RX)

Description:
1. NodeMCU-32S is the core development board designed by for Anxinke based on ESP-32S module.
2. The Development Board continues NodeMCU 1.0 classic design, eliciting most I/O to both sides of the needle, developers can connect peripherals according to their own needs.
3. When using breadboard for development and debugging, the standard needle arrangement on both sides can make the operation more simple and convenient.
Cost-effective
small volume.Easy to embed into any product
Powerful, support LWIP protocol, freertos
Support three modes: AP, STA, AP STA coexistence mode
Lua programming makes your development easier
Package Included:
1 x NodeMCU-32S Lua WiFi IOT Development Board Module
Notes:
Please allow 1-3mm differs due to manual measurement.Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.
Size:

MAX31855 has cold junction compensation, which converts K, J, N, T or E thermocouple signals into digital quantities. The device outputs 14-bit signed data, which is output in read-only format through an SPITM compatible interface. The temperature resolution of the converter is 0.25°C, the highest temperature reading is 1800°C, and the lowest temperature reading is -270°C. For K-type thermocouples, the temperature range is -200°C to 700°C, maintaining an accuracy of ±2°C.
Description:
1. Measuring temperature range: minus 200 degrees Celsius to above zero 1350 degrees Celsius
2. Applicable probe, K-type thermocouple, module is not matched, need to be purchased separately
3. SPI interface, high-speed transmission
Four, input voltage 3-5v DC
5. Direct digital output temperature value without amplifier or ADC
Six, 14-bit resolution, 0.25 degree temperature accuracy
Configuration file modification method:
temperature_control.hotend.enable true #
temperature_control.hotend.thermistor_pin 0.24 #
temperature_control.hotend.heater_pin 2.7 #
temperature_control.hotend.thermistor RRRF100K #
temperature_control.hotend.set_m_code 104 #
temperature_control.hotend.set_and_wait_m_code 109 #
temperature_control.hotend.designator T #
change into:
temperature_control.hotend.enable true #
#temperature_control.hotend.thermistor_pin 0.24 #
temperature_control.hotend.chip_select_pin 0.16
temperature_control.hotend.spi_channel 0 # SPI channel 0 or 1
temperature_control.hotend.heater_pin 2.7 #
#temperature_control.hotend.thermistor RRRF100K #
temperature_control.hotend.sensor max31855
temperature_control.hotend.set_m_code 104 #
temperature_control.hotend.set_and_wait_m_code 109 #
temperature_control.hotend.designator T #
Description
Thermocouples are very sensitive, requiring a good amplifier with a cold-compensation reference. The MAX31855K does everything for you, and can be easily interfaced with any microcontroller, even one without an analog input. This breakout board has the chip itself, a 3.3V regulator with 10uF bypass capacitors and level shifting circuitry, all assembled and tested. Comes with a 2 pin terminal block (for connecting to the thermocouple) and pin header (to plug into any breadboard or perfboard).
New! Now uses the MAX31855K instead of the MAX6675, so it can measure a wider temperature measurement range. Please note! the MAX31855 is not pin compatible or drop-in code compatible with the MAX6675. We do have an Arduino library for both chips but you'll need to adjust any existing MAX6675 designs for the mew MAX31855. The MAX6675 has been discontinued by Maxim.
Version 2.0 now includes ferrite beads and filter capacitor onboard for better stability
Works with any K type thermocouple
Will not work with any other kind of thermocouple other than K type
-200°C to 1350°C output in 0.25 degree increments-note that K thermocouples have about ±2°C to ±6°C accuracy
Internal temperature reading
3.3 to 5v power supply and logic level compliant!
SPI data output requires any 3 digital I/O pins.

MAX31855 has cold junction compensation, which converts K, J, N, T or E thermocouple signals into digital quantities. The device outputs 14-bit signed data, which is output in read-only format through an SPITM compatible interface. The temperature resolution of the converter is 0.25°C, the highest temperature reading is 1800°C, and the lowest temperature reading is -270°C. For K-type thermocouples, the temperature range is -200°C to 700°C, maintaining an accuracy of ±2°C.
Description:
1. Measuring temperature range: minus 200 degrees Celsius to above zero 1350 degrees Celsius
2. Applicable probe, K-type thermocouple, module is not matched, need to be purchased separately
3. SPI interface, high-speed transmission
Four, input voltage 3-5v DC
5. Direct digital output temperature value without amplifier or ADC
Six, 14-bit resolution, 0.25 degree temperature accuracy
Configuration file modification method:
temperature_control.hotend.enable true #
temperature_control.hotend.thermistor_pin 0.24 #
temperature_control.hotend.heater_pin 2.7 #
temperature_control.hotend.thermistor RRRF100K #
temperature_control.hotend.set_m_code 104 #
temperature_control.hotend.set_and_wait_m_code 109 #
temperature_control.hotend.designator T #
change into:
temperature_control.hotend.enable true #
#temperature_control.hotend.thermistor_pin 0.24 #
temperature_control.hotend.chip_select_pin 0.16
temperature_control.hotend.spi_channel 0 # SPI channel 0 or 1
temperature_control.hotend.heater_pin 2.7 #
#temperature_control.hotend.thermistor RRRF100K #
temperature_control.hotend.sensor max31855
temperature_control.hotend.set_m_code 104 #
temperature_control.hotend.set_and_wait_m_code 109 #
temperature_control.hotend.designator T #
Description
Thermocouples are very sensitive, requiring a good amplifier with a cold-compensation reference. The MAX31855K does everything for you, and can be easily interfaced with any microcontroller, even one without an analog input. This breakout board has the chip itself, a 3.3V regulator with 10uF bypass capacitors and level shifting circuitry, all assembled and tested. Comes with a 2 pin terminal block (for connecting to the thermocouple) and pin header (to plug into any breadboard or perfboard).
New! Now uses the MAX31855K instead of the MAX6675, so it can measure a wider temperature measurement range. Please note! the MAX31855 is not pin compatible or drop-in code compatible with the MAX6675. We do have an Arduino library for both chips but you'll need to adjust any existing MAX6675 designs for the mew MAX31855. The MAX6675 has been discontinued by Maxim.
Version 2.0 now includes ferrite beads and filter capacitor onboard for better stability
Works with any K type thermocouple
Will not work with any other kind of thermocouple other than K type
-200°C to 1350°C output in 0.25 degree increments-note that K thermocouples have about ±2°C to ±6°C accuracy
Internal temperature reading
3.3 to 5v power supply and logic level compliant!
SPI data output requires any 3 digital I/O pins.

Product parameters:
Support parallel port: support USB to printer parallel port and EPP or EME parallel port
Support serial port: support USB to UART, I2C, SPI interface
Output voltage: output voltage and signal level can choose 3.3V or 5V
Other: Onboard UART and I2C, SPI working status indicator

Product Features:
Using British FT232RL chip, not FT232BL
Support mainstream operating systems such as Windows 10 8 7 XP Vista windows CE Mac OS-X/Linux/ Android
Support 3 power supply modes: 5V external power supply; 3.3V external power supply; external power supply (requires 3.3V-5V)
With 3 LEDs: TXD LED, RXD LED, POWER LED
VCC, GND, TXD, RXD, RTS, CTS: Use curved pins to lead out, reserve other commonly used pin pads
3.3V and 5V can be selected by beautiful small switches, which is more convenient
Shipping list:
FT232RL gold plate*1
Test jumper cap*1
Dupont line 4Pin*1

Product parameter
Product name: Mini version 2x50W Bluetooth digital power amplifier board
Product model: ZK-502L
Adapted power supply voltage: 5~24V (optional 9V/12V/15V18V24V and other adapters, high power recommended high voltage)
Adapted speakers: 30W~200W, 4Ω, 8Ω
Number of channels: left and right dual channels (stereo)
Bluetooth version: 5.0
Bluetooth transmission distance: 15 meters (unobstructed)
Protection mechanism: self-recovery overheating protection, self-recovery short-circuit protection
Tip: Only when the audio input is enough and the power supply voltage/current is enough, there will be enough output power. The higher the power supply voltage, the higher the relative power, and speakers with different impedances will have different output powers. In the case of sufficient voltage and current, the larger the horn's ohms, the smaller the relative sound power, please pay attention!
Power supply voltage: 12V---8Ω speaker/12W (left channel) 12W (right channel), 4Ω speaker/20W 20W
15V--8Ω/18 18W, 4Ω/more than 30 30W
19V--8Ω/32 32W, 4Ω/more than 45 45W
24V--8Ω/38 38W, 4Ω/more than 50 50W
Question answer:
1. How to choose a power supply?
The power supply of the board is very important. The higher the voltage, the greater the current, and the more sufficient output power. If you only have 12V 1A, you can bring 3-4 inch speakers. If you are above 19V 5A, there is no problem with 8-10 inches, and the power supply must be highly regarded. If the voltage is too low, the amplified sound will easily cause sound distortion. If the current is too small, the speaker will pull down the voltage, which will result in abnormal operation or poor sound quality.
It is recommended to use a power supply of 18V19V24V with a current of 3A or more. If you only have a 9V12V or 1A 2A power supply, you can also use it but the power is low. Please note that when the volume is maximized, it may be distorted and affect the sound quality.
2. How to choose a speaker?
Commonly used speakers are generally 8 ohms, and the positive and negative polarities are not distinguished, and the effect is the same. 4 ohm speakers can also be used. If your speaker has a low power, it may be between 10W-30W. The power supply voltage is lower to prevent the speaker from burning after the amplified sound. For example, choose a power supply below 15V. If you are a 50W-200w speaker, don't worry about the problem of speaker burnout, you can choose a 12-24V power supply. The higher the voltage you choose, the greater the sound or power that can be output.
3. How to connect to Bluetooth?
Power on the power amplifier board, connect the speaker, turn the audio knob to light up, open the phone settings-Bluetooth-search for "BT-WUZHI", and then click connect, after the connection is successful, there will be a Ding Dong sound, this time it is In Bluetooth mode, just play music, and the phone will automatically connect back to the phone next time it is powered on.
4. It's okay if the voice is small, but when the voice becomes louder, the voice becomes muddy?
The sound is distorted, please change to a higher voltage adapter power supply.
5. It's okay if the voice is small, but when the voice becomes louder, the voice freezes?
If the input power is insufficient, the power supply itself has intermittent power failure protection, please replace with a higher power power supply; or the power is too large, the power amplifier board heats up seriously, and thermal protection occurs. Reduce power usage or strengthen heat dissipation.

Features
-New ESP32 version: REV1
- wireless online
- Bluetooth
-4MB Flash
-Lithium battery interface, 500mA high charging current
-Default firmware: MicroPython firmware
-Large serial baud rate: 256000bps

TTP223 touch key module
1.Size: 15*11mm
2.Power: 2.5~5.5V
Trigger setting mode:(1- > Short ; 0- > No Short)
AB=00:No-lock High TTL level ouput;
AB=01:Self-lock High TTL level ouput;
AB=10:No-lock Low TTL level ouput;
AB=11:Self-lock Low TTL level ouput;

TTP223 touch key module
1.Size: 15*11mm
2.Power: 2.5~5.5V
Trigger setting mode:(1- > Short ; 0- > No Short)
AB=00:No-lock High TTL level ouput;
AB=01:Self-lock High TTL level ouput;
AB=10:No-lock Low TTL level ouput;
AB=11:Self-lock Low TTL level ouput;

VL53L3CX V2/Range sensor
VL53L3CX is ST's latest time-of-flight (ToF) product and embeds ST's third-generation FlightSense patented technology. It combines high-performance proximity and ranging sensors, with multi-target distance measurement and automatic trace correction functions. The miniature reflowable package integrates a single photon avalanche diode (SPAD) array and a physical infrared filter to achieve the best ranging performance under various ambient lighting conditions, and is equipped with various cover glass windows. VL53L3CX combines high-performance proximity sensor points, excellent short-distance linearity, and distance measurement capabilities up to 3m. With the patented method and clever module structure, VL53L3CX can also detect different objects in the FoV through in-depth understanding. The histogram algorithm of STMicroelectronics allows the interference immunity of the cover glass to exceed 80cm, and has the function of dynamic smudge compensation.
Product parameter
Main features
Fully integrated miniaturized module
Transmitter: 940m invisible laser (VCSEL)) and its analog driver running high-level digital firmware low-power microcontroller
Fast and accurate ranging
Based on histogram technology
Full field of view (FoV), up to 300cm detection range
Use patented algorithm (direct ToF) to cover glass crosstalk and fingerprint smudges at long distances
Dynamic fingerprint smudge compensation
Short distance, high precision linear
Multi-target detection and distance measurement
Typical full field of view: 25
Convenient integration
Reflowable components
Provides crosstalk calibration between parts or general shapes
Single power supply
Can be matched with various types of glass cover materials
IC interface (up to 1MHz)
Xshutdown (reset) and interrupt GPIO to optimize ranging operation

VL53L3CX V2/Range sensor
VL53L3CX is ST's latest time-of-flight (ToF) product and embeds ST's third-generation FlightSense patented technology. It combines high-performance proximity and ranging sensors, with multi-target distance measurement and automatic trace correction functions. The miniature reflowable package integrates a single photon avalanche diode (SPAD) array and a physical infrared filter to achieve the best ranging performance under various ambient lighting conditions, and is equipped with various cover glass windows. VL53L3CX combines high-performance proximity sensor points, excellent short-distance linearity, and distance measurement capabilities up to 3m. With the patented method and clever module structure, VL53L3CX can also detect different objects in the FoV through in-depth understanding. The histogram algorithm of STMicroelectronics allows the interference immunity of the cover glass to exceed 80cm, and has the function of dynamic smudge compensation.
Product parameter
Main features
Fully integrated miniaturized module
Transmitter: 940m invisible laser (VCSEL)) and its analog driver running high-level digital firmware low-power microcontroller
Fast and accurate ranging
Based on histogram technology
Full field of view (FoV), up to 300cm detection range
Use patented algorithm (direct ToF) to cover glass crosstalk and fingerprint smudges at long distances
Dynamic fingerprint smudge compensation
Short distance, high precision linear
Multi-target detection and distance measurement
Typical full field of view: 25
Convenient integration
Reflowable components
Provides crosstalk calibration between parts or general shapes
Single power supply
Can be matched with various types of glass cover materials
IC interface (up to 1MHz)
Xshutdown (reset) and interrupt GPIO to optimize ranging operation

Description:The ML8511 breakout is an easy to use ultraviolet light sensor. The MP8511
UV (ultraviolet) Sensor works by outputing an analog signal in relation to the amount of UV light that’s detected. This breakout can be very handy in creating devices that warn the user of sunburn or detect the UV index as it relates to weather conditions.
This sensor detects 280-390nm light most effectively. This is categorized as part of the UVB (burning rays) spectrum and most of the UVA (tanning
rays) spectrum. It outputs a analog voltage that is linearly related to the measured UV intensity (mW/cm2). If your microcontroller can do an analog to digital signal conversion then you can detect the level of UV!

Introduction to ADXL346
ADXL346 is a small, thin, ultra-low power consumption, 3-axis accelerometer with high resolution (13bit) measuring up to ± 16 g. The digital output data format is a 16-bit binary and can pass an SPI (3- or 4-wire) or I2C digital interface.
The ADXL346 is very suitable for mobile device applications. It measures the static acceleration of gravity in tilt sensing applications, as well as acceleration caused by dynamic acceleration motion or vibration. With its high resolution (4mg/LSB), it can measure tilt angles with a tilt change of less than 1 degree.
Some special sensing functions are provided. Such as remote sensing to detect the presence of activity and inactivity or lack of motion acceleration to compare any axial acceleration with the g value set by the user. Click sensor detection in the single, double click any direction. Freefall sensing detects if the device is falling down.
ADXL356 built-in directional detection capability of concurrent four or six position detection and the user can notify the controller of the selected interrupt. These functions can be individually mapped to the following two interrupt output pins. An integrated, patent-pending memory management system, 32-level first-in-first-out (FIFO) buffer, can be used to store data, minimize the activity of the host processor, and reduce overall system power consumption. The low power consumption mode enables smart sports power management with threshold detection and active acceleration measurement at extremely low power consumption.
Introduction to ADXL362
ADXL362 is ultra-low power consumption, 3-axis MEMS accelerometer, the power consumption is less than 2 μA when the output data rate is 100 Hz, and the power consumption is 270 nA in motion-triggered wake-up mode. Unlike accelerometers that use periodic sampling to achieve low power consumption,
The ADXL362 does not alias the input signal by undersampling; it samples the entire bandwidth of the sensor at the full data rate.
ADXL362 usually provides 12-bit output resolution; when the lower resolution is sufficient, it also provides 8-bit data output to achieve more efficient single-byte transmission. The measurement range is ±2 g, ±4 g, and ±8 g, and the resolution within the range of ±2 g is 1 mg/LSB.
Applications that require a noise level lower than the ADXL362's normal value of 550 μg/√Hz can choose one of two low-noise modes (typically as low as 175 μg/√Hz), with minimal increase in power supply current.
In addition to ultra-low power consumption, ADXL362 also has many features to achieve true system-level energy saving. The device contains a deep multi-mode output FIFO, a built-in micro-power temperature sensor, and several motion detection modes, including sleep and wake-up modes with adjustable thresholds. In this mode, when the measurement rate is about 6 HZ Power consumption is as low as 270 nA. If necessary, a pin output can be provided to directly control an external switch when motion is detected. In addition, the ADXL362 also supports external control of the sampling time and/or system clock. ADXL362 can work in a wide supply voltage range of 1.6V to 3.5V and can interface with a host computer that uses an independent low supply voltage when necessary.
Product specifications:
•# of Axes—3
•Range— -2/4/8/G16
•Sensitivity—up to 256 LSB/g
•Output Type—Digital
•Typical Bandwidth (kHz)—1.6kHz
•Supply Current —145μA
Product Features:
•Ultralow power: as low as 23 μA
•Freefall detection
•Single tap/double-tap detection
•Activity/inactivity monitoring
•Flexible interrupt modes mappable to either interrupt pin
Applications:
• mobile phone
•Medical equipment
• Games and pointing devices
•Industrial Instruments
•Personal navigation equipment
• Hard disk (HDD) fall protection
• Tablet PC screen flip

3.7V lithium battery charging protection board module, suitable for polymer 18650, can be spot welded and 3A overcurrent value
Description:
The main IC has protection functions such as overcharge, overdischarge, overcurrent, and short circuit. It is used for 3.7V lithium batteries with various capacities and shapes. Adopt protection IC, high-quality MOSFET such as VISHAY, AOS, IR, FR-4 low temperature coefficient board, fine design, workmanship, and comprehensive testing. Small in size, suitable for many occasions that require high integration and low cost, can meet various performance requirements, and ensure the safety and reliability of the battery pack.
Technical Parameters:
Overcharge detection voltage: 4.25±0.05V
Overcharge release voltage: 4.23±0.05V
Overdischarge detection voltage: 2.54±0.1V
Overcurrent detection current: 1-3A
The main function:
Overcharge protection function, over discharge protection function, short circuit protection function, over current protection function.
Wiring instructions:
B is connected to the positive electrode of the battery.
B- Connect the negative electrode of the battery.
P is the positive electrode of the battery output and input
P- is the battery output and input negative

Parameter:
Power supply voltage 3-5V
Size: 14mm * 14mm
Description:
Heart Rate click carries Maxim's MAX30100 integrated pulse oximetry and a heart-rate sensor. It's an optical sensor that derives its readings from emitting two wavelengths of light from two LEDs - a red and an infrared one - then measuring the absorbance of pulsing blood through a photodetector. This particular LED color combination is optimized for reading the data through the tip of one's finger. The signal is processed by a low-noise analog signal processing unit and communicated to the target MCU through the mikroBUS™ I2C interface. Developers of end-user applications should note that the readings can be negatively impacted by excess motion and changes in temperature. Also, too much pressure can constrict capillary blood flow and therefore diminish the reliability of the data. A programmable INT pin is also available. Uses a 3.3V power supply.
Key features:
Optical sensor: IR and red LED combined with a photodetector Measures absorbance of pulsing blood
I2C interface plus INT pin
3.3V power supply
Key Benefits:
Motion artefact resillence
Ambient light cancellation
Ready-to-use examples save development time
Supported in all MikroElektronika compilers
Applications
Developing algorithms for pulse oximetry and heart rate readings through the tip of a finger.
Package Included:
1 X Heart rate click

Parameter:
Power supply voltage 3-5V
Size: 14mm * 14mm
Description:
Heart Rate click carries Maxim's MAX30100 integrated pulse oximetry and a heart-rate sensor. It's an optical sensor that derives its readings from emitting two wavelengths of light from two LEDs - a red and an infrared one - then measuring the absorbance of pulsing blood through a photodetector. This particular LED color combination is optimized for reading the data through the tip of one's finger. The signal is processed by a low-noise analog signal processing unit and communicated to the target MCU through the mikroBUS™ I2C interface. Developers of end-user applications should note that the readings can be negatively impacted by excess motion and changes in temperature. Also, too much pressure can constrict capillary blood flow and therefore diminish the reliability of the data. A programmable INT pin is also available. Uses a 3.3V power supply.
Key features:
Optical sensor: IR and red LED combined with a photodetector Measures absorbance of pulsing blood
I2C interface plus INT pin
3.3V power supply
Key Benefits:
Motion artefact resillence
Ambient light cancellation
Ready-to-use examples save development time
Supported in all MikroElektronika compilers
Applications
Developing algorithms for pulse oximetry and heart rate readings through the tip of a finger.
Package Included:
1 X Heart rate click

Interface provided by Arduino universal development board:
1. Support Arduino IDE 1.0 (OSX/Win/Linux)
2. It can be powered by USB or 5v or 7-35v (automatic matching) additional power supply
3. There is a 500ma 5V regulator on the motherboard
4.USB embedded (serial debugging)
5.6 I/O Pins (2 to support USB)
6.8k Flash Memory (about 6k after bootloader)
7. I2C and SPI (vis USI)
8. PWM on 3 pins (more possible with Software PWM)
9. ADC on 4 pins
10.Power LED indicator and Test/Status LED (at Pin0)

Module parameters:
Function: It can control the forward and reverse rotation of 2 motors (for example, the balance car only needs one module)
Voltage: 7.6~40V
Current: Module with current limiting protection, 2A (overcurrent will not cut off the power, only limit the output current)
Control: 4 PWM pins are required. (If inversion is not required, only 2 PWM pins are needed.) It is much simpler to use than L298, and instructions are provided.
Weight: 3g
Size: 23*17.6mm
Lead out 2 rows of 7Pin headers, the spacing is 20mm
Shipping list:
Two-way motor drive module (the header has been welded) 1

MP-4 flammable gas sensor
Product description
MP-4 flammable gas sensor multi-layer thick film manufacturing craft, micro type
Al2O3 Ceramic-based single-sided two-sided separate production heater Japanese metal oxidized semi-leading element
Qi sensation layer, inside the enclosed metal jar. This environment is in the air.
At the time of existence, the sensory conductivity rate is changed. Approximately high concentration, the feeling of humor
Instrumental conductivity rate. Simple electric circuit Immediately available General
Transforming conversion Transforming gas body Concentration phase Opposite export signal.
A special feature of the sensor
This product has a comparatively good concentration, good concentration, a strong anti-drying ability, low wear, recovery, and qualitativeness.
Good points, long life, low-cost carrier, driver, etc.
Main application
1. Home, industrial, commercial flammable gas leak measuring device, fire prevention / safety measurement system.
2. Flammable gas leak alarm, gas leak.

illustrate:
AD9833 is a low-power, programmable, sine wave generator, triangle wave and square wave output. It needs to be generated in various types of waveform detection, implementation and time domain reflectometry (TDR) applications. The output frequency and phase are all programmable software, which can be easily adjusted. No external components are necessary. The frequency register is 28 bits wide: the clock frequency is 25 MHz, which can achieve a resolution of 0.1 Hz; the clock frequency of AD9833 is 1 MHz, which can be tuned to a resolution of 0.004 Hz
AD9833 has a standard serial interface, allowing the device to be directly connected to different microprocessors. The device uses an external serial clock to write data or information to the control device
The AD9833WBRMZ-REEL model can be controlled to meet the quality and reliability requirements of automotive applications. Please note that the car specifications of this model may be different from the commercial model; therefore, the designer must carefully read the specific part of this data sheet. Only automotive grade indicating products can be used in automotive applications. Please contact your local ADI company representative account to learn about specific product ordering information and obtain specific car reliability reports for these models
AD9833 writes through the serial interface line. The operating clock frequency of this serial interface is up to 40 MHz, and the standard is compatible with DSP and microcontroller. The device is powered by a 2.3 V 5.5 V power supply
AD9833 has a power-down function (SLEEP). This can turn off the unused parts of the device, thereby minimizing the power consumption, for example, the DAC can be turned off when the output clock is generated
Features:
Digitally programmable frequency and phase
12.65 mW 3 V
0 MHz to 12.5 MHz output frequency range
Bit resolution: 0.1Hz to 25 MHz reference clock
Sine wave, triangle wave and square wave output
2.3 V to 5.5 V power supply
No external components required
SPI interface line
Extended temperature range: 6 140°C to 105°C
Power down option
Update frequency: 25 (maximum)
Maximum value of VOUT: 0.65 V.
Minimum VOUT: 38mV
VOUT temperature coefficient: 200°
High voltage input: 1.7-2.8 V.
Low voltage input: 0.5-0.7 V.
Input current: 10 & micro; one
Entry capacity: 3pF
Operating temperature is 6 140°C to 105°C; typical specification is 25°C
Size: 17 * 12mm / 0.66 * 0.47"
Quantity: 1 piece
The package includes:
1 signal generator module

MP-2 Smoke Detection Gas Sensor
product description
The MP-2 smoke detection gas sensor adopts a multilayer thick film manufacturing process. A heater and a metal oxide semiconductor gas sensor are fabricated on both sides of a miniature Al2O3 ceramic substrate, and they are encapsulated in a metal shell. When the detected gas exists in the ambient air, the conductivity of the sensor changes. The higher the concentration of the gas, the higher the conductivity of the sensor. A simple circuit can convert this change in conductivity into an output signal corresponding to the gas concentration.
Sensor characteristics
This product has good sensitivity to propane, smoke, etc. in a wide concentration range, and has a small size, long life, low cost, and drive
Features such as a simple circuit.
main application
It is widely used in household smoke alarms, industrial smoke alarms, and portable smoke detection instruments.

Product description:
The new temperature and humidity sensor series SHT3X takes the sensor technology to a new level. The SHT3X series includes a low-cost version SHT30, a standard version SHT31, an I2C interface and a wide operating voltage range (2.4-5.5V)
Technical Parameters:
1. Humidity measurement range: 0~100% RH
2. Humidity measurement accuracy: SHT30 ±3% RH; SHT31 ±2% RH;
3. Temperature measurement range: -40~125℃
4. Temperature measurement accuracy: ±0.3℃
5. Working voltage: 2.4~5.5VDC (wide voltage)
6. I2C interface output
7. Size: 17MM*12MM

Product description:
The new temperature and humidity sensor series SHT3X takes the sensor technology to a new level. The SHT3X series includes a low-cost version SHT30, a standard version SHT31, an I2C interface and a wide operating voltage range (2.4-5.5V)
Technical Parameters:
1. Humidity measurement range: 0~100% RH
2. Humidity measurement accuracy: SHT30 ±3% RH; SHT31 ±2% RH;
3. Temperature measurement range: -40~125℃
4. Temperature measurement accuracy: ±0.3℃
5. Working voltage: 2.4~5.5VDC (wide voltage)
6. I2C interface output
7. Size: 17MM*12MM

Product description:
Mono digital power amplifier board PBTL
Power amplifier chip: TPA3110
Working voltage: 8~26VDC
Output power: 1X30W (mono, two for stereo)
Recommended speaker impedance: 8 ohms (4 ohms and 6 ohms can also be used)

Product introduction: The VL6180 is a time-of-flight ranging sensor. The sensor contains a very small laser source and a matching sensor. The VL6180X can detect the "time of flight" or the time required for the laser to recover the sensor to calculate the distance. Unlike most distance sensors that rely on reflected light intensity or angle of reflection to determine the distance, the VL6180 uses an accurate clock to measure the time it takes for light to bounce off the surface since it uses a very narrow source, which is different from ultrasonic sonar. Unlike traditional infrared distance sensors, you can't tell if an object is close because there is no linear problem or "dual imaging." Therefore, the VL6180X is more accurate. The VL6180 module is recommended to handle distances from 5mm to 100mm. Due to its small size, the sensor module is easy to use in any robot or interactive project. You can use it with any 3-5V power supply or logic microcontroller. Product Features 1. The inte grated intelligent optical module, which can be used for proximity sensing, ranging, and other functions; 2. Fast and accurate distance measurement. Measure the absolute range from 0 to 100 mm or more. Based on object-independent self-illuminating beam reflection measurements , measurements over 100 mm can be used in some extremely desirable target reflectances and environments, but are not guaranteed; 3. I2C interface for device control and data, two programmable GPIOs.

Product parameter
DHT11

Humidity

Temperature
Resolution

1％RH

1℃
Measuring Range

20~95％RH

0~50℃
Precision

±5％RH（25℃）

±2℃
Storage Environment

Below 60% RH

10~40℃
Operating Voltage

3.3V~5V
Signal Output Form

Digital Signal
DHT22

Humidity

Temperature
Resolution

0.1％RH

0.1℃
Measuring Range

0~99.9％RH

-40~80℃
Precision

±2％RH

±0.5℃
Storage Environment

Below 60% RH

10~40℃
Operating Voltage

3.3V~5V
Signal Output Form

Digital Signal
Features:
1. Use with D1 MINI
2. Arduino compatible, use Arduino IDE for programming
3.11XI/O pin
4.1XADC pin (input 0-3.3V)
5. Support OTA online
Shipping list:
1.Long femalepinsx2pcs
2.Short female pins x2pcs
3.Normalpins x2pcs
4.DHT Shield  x1pcs

Product parameter
DHT11

Humidity

Temperature
Resolution

1％RH

1℃
Measuring Range

20~95％RH

0~50℃
Precision

±5％RH（25℃）

±2℃
Storage Environment

Below 60% RH

10~40℃
Operating Voltage

3.3V~5V
Signal Output Form

Digital Signal
DHT22

Humidity

Temperature
Resolution

0.1％RH

0.1℃
Measuring Range

0~99.9％RH

-40~80℃
Precision

±2％RH

±0.5℃
Storage Environment

Below 60% RH

10~40℃
Operating Voltage

3.3V~5V
Signal Output Form

Digital Signal
Features:
1. Use with D1 MINI
2. Arduino compatible, use Arduino IDE for programming
3.11XI/O pin
4.1XADC pin (input 0-3.3V)
5. Support OTA online
Shipping list:
1.Long femalepinsx2pcs
2.Short female pins x2pcs
3.Normalpins x2pcs
4.DHT Shield  x1pcs