Kereskedelmi, irodai és ipari

Feature:1. The material is plastic,wires and power;though the material is little complex,the material is what the material of the product should be.
2. The color is mainly black that also is the color widely used on industrial accessory.
3. Starting mode is electric start,is also a commonly used starting mode, more common and safe.
4. The product coud fit single phase 2KW~3KW gasoline generator.
5. The product is convenient and practical, and provides a strong backing for the operation of the generator.
Item Description:Chinese Generator Voltage Regulator Rectifier Single Phase AVR Fit 2KW - 3KW
Specifications:100% Brand New
Color:Mainly black
Material:Plastic wires power
Size:11cm*3.8cm*3.5cm(L*W*H),wire length about 7cm
Weight:114g
Power:2KW-3KW
Starting mode: Electric start
Fit for:Single-phase 2KW ~ 3KW gasoline generator
Package included:1pc voltage regulator
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products Specifcation    
  Products No.  
     
Item Specifcation  
储存温度Storage Temperature Range -30°C～80°C  
运行温度Operating Temperature Range -25°C～70°C  
     
Item Specifcation  
温度 Temperature Range -25°C～70°C  
湿度 Humidity Range 65% ±10%  
     
Item Specifcation  
舵机尺寸 Size 22.4*12.5*22.8mm  
重量 Weight 10g±5%  
齿轮类型 Gear type 5 Plastic,   
机构极限角度 Limit angle 200°±5°  
轴承 Bearing NO  
出力轴 Horn gear spline 20T     直径:4.9mm  
摆臂 Horn type Plastic, POM  
外壳 Case Engineering plastics(PBT)  
舵机线 Connector wire 250mm±5mm  
马达 Motor Carbon brush motor  
防水性能 Splash water resistance No  
     
工作电压 Operat voltage 4.8V  
静态电流  Idle current mA  
空载转速  No load speed 0.09sec/60°  
空载电流  Runnig current 90mA  
堵转扭矩  Peak stall torque 1.3kg.cm  
堵转电流 Stall current 750mA±10%  
     
Item Specifcation  
控制信号 Command signal Pulse width modification  
放大器类型 Amplifier type Analog controller  
脉冲宽度范围 Pulse width range 500～2500usec  
中点位置 Neutral position 1500usec  
旋转角度 Running degree 180°±3°(when 500～2500usec)  
死区宽度 Dead band width 8 usec  
旋转方向 Rotating direction Counterclockwise (when 1000～2000usec)
 

GY-521 MPU-6050 MPU6050 Module 3 Axis analog gyro sensors 3 Axis Accelerometer Module
 
Teile nicht.: Gy-521 mpu-6050 modul
 
Mpu-6050 Module( drei- Achse kreisel drei- Achse beschleunigungsmesser)
 
Die chip: mpu-6050
 
Stromversorgung: 3-5v( intern low-dropout- Regler)
 
Kommunikations-Modi: Standard IIC Kommunikationsprotokoll
 
Chip Einbau- 16-Bit AD-Wandler,16-Bit Datenausgabe

Product introduction: The INMP441 is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port. The The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog to digital converter, anti-aliasing filter, power management and industry standard 24-bit I2S interface. The I2S interface allows the INMP441 to be directly connected to digital processors such as DSPs and microcontrollers without the need for an audio codec for use in the system. The INMP441 has a high signal-to-noise ratio and is an excellent choice for near field applications. The INMP441 has a flat wideband frequency response that results in high definition of natural sound. Product Features: 1. Digital I2S interface with high precision 24-bit data 2. High signal to noise ratio is 61 dBA 3. High sensitivity - 26 dBFS 4. Stable frequency response from 60 Hz to 15 kHz 5. Low power consumption: low current consumption 1.4 mA 6. High PSR: -75 dBFS Interface definition: SCK: Serial data clock for I2S interface WS: Serial data word selection for I2S interface L/R: Left/Right channel selection. When set to low, the microphone outputs a signal on the left channel of the I2S frame. When set to high level, the microphone outputs signals on the right channel SD: Serial data output of the I2S interface. VCC: Input power, 1.8V to 3.3V. GND: power ground This product provides tutorials for using ESP32 modules with I2S functionality. Connect to ESP32: INMP441 ESP32 SCK >> GPIO14 SD >> GPIO32 WS >> GPIO15 L/R >> GND GND >> GND VDD >> VDD3.3 What is the difference between an omnidirectional microphone and a unidirectional microphone: First of all, I understand that the sound divergence is all-round. One person speaks and diverge in the air. As for how far it can pass, it depends on many factors. 1.directional microphone, the general pickup radius is very small, 30 cm is a big one, single use, put it on the mouth, the sound quality is very good, because it is not picked up again. The shape is generally goose neck wheat, a rod, a curved rod, to your mouth, directivity, just listen to your voice. With a single-point microphone, the sensitivity is limited to a certain range. Sensitivity is too high, causing sharp whistling, etc., involving many other devices As for why not make a big pickup radius, there is a reason. Later 2.omnidirectional microphone, the general pickup radius is very large, one meter two meters three meters five meters have, compared with ten centimeters, this level is very different, it is not just picking a person's voice, but Multiple people, five six, seven eight or even ten. Omnidirectional microphones are highly sensitive, The omnidirectional microphone pickup radius is too large, and it will also pick up more ambient noise, so the sound quality is not as good as the single-point microphone, unless you do a good noise reduction. There is definitely a difference between collective use and single-person service. But omnidirectional wheat has a benefit, the wiring is simple, not one by one. Suitable for small meetings, ad hoc meetings, some remote discussions, remote operations. 3.single-point wheat generally supports local amplification, Omnidirectional microphones generally do not support local amplification. It should be noted that because of such high sensitivity, the local amplification whistling is very scary, and the current technology is difficult to deal with.

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;

GY-521 MPU-6050 MPU6050 Module 3 Axis analog gyro sensors 3 Axis Accelerometer Module
 
Teile nicht.: Gy-521 mpu-6050 modul
 
Mpu-6050 Module( drei- Achse kreisel drei- Achse beschleunigungsmesser)
 
Die chip: mpu-6050
 
Stromversorgung: 3-5v( intern low-dropout- Regler)
 
Kommunikations-Modi: Standard IIC Kommunikationsprotokoll
 
Chip Einbau- 16-Bit AD-Wandler,16-Bit Datenausgabe

 
What's new about V3.0.0
 
Optimize the circuit
 
Add Deep-Sleep jumper.
Default firmware: lastest MicroPython ESP8266 firmware.
 
 
Features
 
11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)
1 analog input(3.2V max input)
a Micro USB connection
Compatible with for MicroPython, for Arduino, for Nodemcu
lots of Shields
 
 
Package include:
 
 
Long femalepinsx2pcs 
Short female pins x2pcs
Normal pins x2pcs
for WEMOS D1 mini Boardx1pcs

 
10PCS GERMANIUM DIODE 1N34A DO-35 1N34 IN34A

 

Description:
Brand new and high quality
LCD display module with blue blacklight
Wide viewing angle and high contrast
Built-in industry standard HD44780 equivalent LCD controller
Commonly
used in: copiers, fax machines, laser printers, industrial test
equipment, networking equipment such as routers and storage devices
LCM type: Characters
Can display 2-lines X 16-characters
Operate with 5V DC
Module dimension: 80mm x 36mm x 12mm
Viewing area size: 64.5mm x 16mm

 
Never hunt around for another crystal again, with the Si5351A clock generator breakout ! This chip has a precision 25MHz crystal reference and internal PLL and dividers so it can generate just about any frequency, from <8KHz up to 150 MHz.
The Si5351A clock generator is an I2C controller clock generator. It uses the onboard precision clock to drive multiple PLL's and clock dividers using I2C instructions. By setting up the PLL and dividers you can create precise and arbitrary frequencies. There are three independent outputs, and each one can have a different frequency. Outputs are 3Vpp, either through a breadboard-friendly header or, for RF work, an optional SMA connector.
We put this handy little chip onto it's own breakout board PCB, with a 3.3V LDO regulator so it can be powered from 3-5VDC. We also put level shifting circuitry on the I2C lines so you can use this chip safely with 3V or 5V logic.
Best of all, we even have a great tutorial and library to get you started! Our code is designed for use with the Arduino microcontroller and IDE but is easily ported to your favorite platform with I2C support
 
 
 

ESP32 ESP-32 ESP-32S ESP32S For WeMos Mini D1 Wifi Bluetooth Wireless Board Module Based ESP-WROOM-32 Dual Core Mode CPU

Nodemcu V3 Lua WiFi module integrated ESP8266 additional memory 32M FLASH, USB serial port ch340g
WiFi modern ESP8266 32MB,
The module is based on a wide range of exploration ESP8266 system chips from expressif.
WiFi modern ESP8266 32MB, compatible with nodemcu board.
The extra memory size is 32MB. This is better for big library projects. You do not have to worry about the size of the memory.
Usb-ttl serial converter ch340g, mini USB socket.
DC 4 ~ 9v PowerIn pin VIN.
Pins 2.54mm (0.1 ") 15 X 2-wire pin set. Do not solder.
Combined with WiFi access points and featured stations microcontrollers using Lua programming language based on simple.
WIFi modern ESP8266 32MB,
Provide: Hardware IO. Can be used in the IDE event-driven API network application 10 d0-d10, PWM function programming, IIC and SPI communication, in a board WiFi wireless network and ADC (A0, etc. can be used as access points and / or stations, host servers ), Connect to the Internet, get or upload data. Developing panels can be used in developing countries.

Description:This tiny little board does all of the neat-o for Arduino tricks that you're familiar with: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx. Running at 16MHz and 5V, this board will remind you a lot of your other favorite for Arduino-compatible boards but this little guy can go just about anywhere. There is a voltage regulator on board so it can accept voltage up to 12VDC. If you're supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC.
This latest revision corrects the silk error from the last version of the board so that pin 14 is correctly labeled. We've also added a PTC fuse and diode protection to the power circuit and corrected the RX and TX LED circuit.
Features:
ATMega 32U4 running at 5V/16MHz
Supported under for Arduino IDE v1.0.1
On-Board micro-USB connector for programming
4 x 10-bit ADC pins
12 x Digital I/Os (5 are PWM capable)
Rx and Tx Hardware Serial Connections
 
 
 

Test Code:
/*
* Web Server
*
* A simple web server that shows the value of the analog input pins.
*/
#include
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 192, 168, 0, 15 };
Server server(80);
void setup()
{
Ethernet.begin(mac, ip);
server.begin();
}
void loop()
{
Client client = server.available();
if (client) {
// an http request ends with a blank line
boolean current_line_is_blank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
// if we've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so we can send a reply
if (c == '\n' && current_line_is_blank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println();
// output the value of each analog input pin
client.print("welcome to tinyos");
client.println("
");
client.print("//*************************************");
client.println("
");
client.print(www.tinyos.net.cn);
client.println("
");
client.print("//*************************************");
client.println("
");
for (int i = 0; i < 6; i ) {
client.print("analog input ");
client.print(i);
client.print(" is ");
client.print(analogRead(i));
client.println("
");
}
break;
}
if (c == '\n') {
// we're starting a new line
current_line_is_blank = true;
} else if (c != '\r') {
// we've gotten a character on the current line
current_line_is_blank = false;
}
}
}
client.stop();
}
}

 
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

10PCS MP1584EN 3A Ultra-Small Size DC-DC Step Down Supply Module Adjustable power step-down descending output module
型号/名称

超小DC-DC降压模块
输入电压

4.5V~28V
输出电压

0.8V~20V
输出电流

3A（最大）
转换效率

92% （最高）
输出纹波

<30mV
开关频率

1.5MHz（最高），典型1MHz
工作温度

-45℃~ 85℃
尺寸大小

22mm * 17mm * 4mm（长*宽*高）

Description:
Want to make a hexapod walker? Maybe you're making a piece of art with tons of moving parts, or you need to drive a ton of LEDs with precise PWM output. Your microcontroller has a limited number of PWM outputs, and you find yourself running out! Not with the Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C interface. With this pwm and servo driver breakout, you can control 16 free-running PWM outputs with just two pins! Need to run more than 16 PWM outputs? No problem. Chain together up to 62 of these beauties for up to an outstanding 992 PWM outputs.
Features:
Dimensions (no headers or terminal block) 2.5" x 1" x 0.1" (62.5mm x 25.4mm x 3mm)
Weight (no headers or terminal block): 5.5grams
Weight (with 3x4 headers & terminal block): 9grams
This board/chip uses I2C 7-bit address between 0x60-0x80, selectable with jumpers
Terminal block for power input (or you can use the 0.1" breakouts on the side)
Reverse polarity protection on the terminal block input
Green power-good LED
3 pin connectors in groups of 4 so you can plug in 16 servos at once (Servo plugs are slightly wider than 0.1" so you can only stack 4 next to each other on 0.1" header
"Chain-able" design
A spot to place a big capacitor on the V line (in case you need it)
220 ohm series resistors on all the output lines to protect them, and to make driving LEDs trivial
Solder jumpers for the 6 address select pins
i2c-controlled PWM driver with a built in clock. Unlike the TLC5940 family, you do not need to continuously send it signal tying up your microcontroller, its completely free running!
It is 5V compliant, which means you can control it from a 3.3V microcontroller and still safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4 forward voltages)
6 address select pins so you can wire up to 62 of these on a single i2c bus, a total of 992 outputs - that's a lot of servos or LEDs
Adjustable frequency PWM up to about 1.6 KHz
12-bit resolution for each output - for servos, that means about 4us resolution at 60Hz update rate
Configurable push-pull or open-drain output
Output enable pin to quickly disable all the outputs
(1)Drive board connected to Arduino:
The PWM driver board uses the I2C method, so only four lines can be connected to the Arduino device:
"Classic" Arduino pin mode:
5v -> VCC
GND -> GND
Analog 4 -> SDA
Analog 5 -> SCL
Old Mega pin way:
5v -> VCC
GND -> GND
Digital 20 -> SDA
Digital 21 -> SCL
R3 and later Arduino pin method (Uno, Mega &
Leonardo):
(These boards have dedicated SDA and SCL pins)
5v -> VCC
GND -> GND
SDA -> SDA
SCL -> SCL
VCC pin is only for the chip power supply, if you want to connect the servo or LED lights, use the V pin power supply, V pin supports 3.3 ~ 6V power supply (chip safe voltage 5V). It is recommended to connect the external power supply via the power supply terminal.
(2) power supply part:
Most of the servo design voltage is 5 ~ 6V, especially in a number of steering gear at the same time running, with the need for high-power power supply. If you are directly using the Arduino 5V pin to power the servo directly, there are some unpredictable problems, so we recommend that you have a suitable external power supply for the drive board.
(3) Connect the servo:
Most servos are connected using standard 3-wire female plugs, as long as the corresponding pin into the driver board on it. (Ground wire is generally black or brown, the signal line is generally yellow or white)
(4) for the driver board assigned address:
Each drive board of the cascade needs to have a unique access address. The initial I2C address of each driver board is 0 × 40, you can modify the upper right corner of the jumper I2C address. Connect a jumper with solder to indicate a binary number "1".

 
 
The FT232R is a USB to serial UART interface
A low-cost way to add USB capability to microcontrollers. Use this to give your own breadboard For USB capability for bootloading or downloading sketches.
RXD/TXD transceiver communication indicator
Includes over-current protection, using a 500ma self-restoring fuse
This board includes a DTR pin needed to auto-reset when downloading to your device.
Color: Red
USB Power Supply: 3.3V or 5V
 

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

LM2596 LM2596S DC-DC 4.5-40V adjustable step-down power Supply module
Name : LM2596 DC-DC Buck module
Input voltage :4V ~ 35V
The output voltage : 1.23V ~ 30V
Output Current :3A( Max)
Conversion efficiency:92% ( MAX )
Output ripple: <30mV
Switching frequency: 150KHz
Working temperature: -forty Five~ 85
Size :43mm * 21mm * 14mm(Long*Width*Hight)
Features:
1. the range of input voltage: 3.2 V to 40 V dc (input voltage must be higher than to the output voltage of 1.5 V above. Can't booster)
2. the range of output voltage: 1.25 V dc to 35 V voltage adjustable, high efficiency (92% ) largest maximum output current is 3A.
Instructions:
1. Power (3-40V), power indicator light, the module is working properly.
2. Adjust the blue potentiometer knob (clockwise rotation generally boost,counter-clockwise rotationTurn down) and reach with a multimeter to monitor the output voltage required voltage.
Note:
Current work long hours is recommended for use in less than 2.5A, while adding bulkHeat sink (10W output above),because it is the step-down module, in order to ensure stable output Set,please keep the minimum 1.5V differential.

 
The main features
Wide power supply voltage of 1.71 V to 3.6 V
Independent IO power supply (1.8 V) and the power supply voltage compatible
Ultra-low power consumption of plus or minus 2 g / / 6 g / 4 g 8 g / 16 grams of dynamic optional full scale
IIC/SPI digital output interface
16 bit data output
A programmable embedded state machine
Embedded temperature sensor
Built-in self test
An embedded fifo
10000 g high impact ability.

 
Product features:
1. The ultra-thin, subminiature
2. The full voltage input (90 ~ 264 vac)
3. Low ripple and low noise
4. Output overload short circuit protection function
5. High efficiency and power density
6. Product design to meet the EMC and safety testing requirements
7. Low power consumption, green environmental protection, no-load loss < 0.1 W
Aging and
8.100% load test
9. Meet the requirements of UL, CE,
The quality guarantee period of 10.1 years
2. Environmental conditions
The name of the project
Technical indicators:Single bit
Working temperature: - 20-60 degree
Storage temperature: 80-40 -degree
Relative humidity: 5-95.%
The cooling way: Natural cooling
 
The atmospheric pressure: 80-106Kpa
The altitude :2000M or less
vibration
Vibration coefficient of 10 ~ 500 hz, 2 g10min. / 1 cycle, 60 min. Each along the X, Y, Z axes
 
3. The electrical characteristics
 
1. The input features (test) at room temperature.
The name of the project
The technical requirements:Single bit
The rated input voltage:100-100.VAc
The input voltage range:90-90.VAc
Maximum input current:0.2 or less a.
Input surge current;10 or less a.
Maximum input voltage:270 or less VAc
Input soft start: 50 or less MS
Efficiency of low input voltage: Vin = 110 vac, output with 69 or more %
High input voltage: Vin = 220 vac, output with 70 or more %
Long-term reliability:MTBF 100000 or more H.
No load rated output voltage: 5 / - 0.1 VDc
Full rated output voltage: 5 / - 0.2 VDc A
short time maximum output current: P 1000 ma
The maximum output current for a long time: P 600 ma
Voltage regulation: / - 0.2 %
Load regulation: / - 0.5  %
The output ripple and noise: (mVp - p) 50 or less
The rated input voltage and output load.With 20 MHZ bandwidth oscilloscope,
Load and 10 uF and 0.1 uF capacitance test. The MV
Switch machine overshoot
(rated input voltage, output and 10% load) 5 or less % VO
Output over-current protection
Output the maximum load of 150-200%
a.
Output short circuit protection
Directly to the output of the normal short circuit, short circuit automatically resume normal work after removal
4. Safety features:
4.1 the product design as to meet the requirements of UL, CE safety certification.
 
4.2 safety and electromagnetic compatibility
The input design USES UL 0.5 A insurance;
PCB board made of double-sided copper-clad boards material is 94 - where V0 fire rating level;
Safety standards in accordance with UL1012 EN60950, UL60950
Insulation voltage I/P - O/P: 2500 vac
Insulation resistance I/P - O/P > 100 m Ohms / 500 VDC 25 degree 70% RH
Conduction and radiation in line with the EN55011, EN55022 (CISPR22)
Electrostatic discharge IEC/EN 61000-4-2 level 4 8 kv / 15 kv
Radiofrequency radiation immunity IEC/EN 61000-4-3 can be found in the application
4.3 safety design temperature
At normal temperature on our power capacitor, main converter so on surface temperature does not exceed 90 degree; the largest
The shell surface maximum temperature does not exceed 60 degree;

11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)
1 analog input(3.2V max input)
a Micro USB connection
Compatible with Arduino
Compatible with nodemcu
lots of Shields
 
 

 
10pcs/lot new original W25Q128FVSG W25Q128FV W25Q128 W25Q128FVSSIG W25Q128FVSIG W25Q128FVSQ W25Q128FVSIQ SOP8
 

ESP32 ESP-32 ESP-32S ESP32S For WeMos Mini D1 Wifi Bluetooth Wireless Board Module Based ESP-WROOM-32 Dual Core Mode CPU

Features:
Input: 7-24V
Max Current: 1A
Shipping list:
1.WEMOS DC Power Shiled  x1PCS
2. Pins  x2PCS
3. Connector  x1PCS
 
 

What's new with D1 mini Pro
4M bytes(128M bit) Flash
 
 
External antenna connector
 
 
Built-in ceramic antenna
 
 
New CP2104 USB-TO-UART IC
 
 
Same size as D1 mini, but more light
 
 
 

10pcs TPA3118 PBTL mono digital amplifier board 1X60W 12V 24V POWER AMP

 
Product Details
FM Stereo Radio Module RDA5807M RRD-102V2.0 Wireless Module Pro New for Arduino
Article-Nr.:5400777
Product Details:
Stereo Module
Condition: New
Overview: 
"RRD-102V2.0" stereo radio module (FM Stereo radio Module) high sensitivity, low power consumption,ultra- small size of the FM stereo radio module.Using RDA Microelectronics of RDA5807M(or RDA5802NM),this circuit fewer external components,the noise factor is minimal. Small size,low power consumption,low cost,simple application,the use of a wide range of advantages.Is an easy-to-use and possessed highly cost-effective single-chip FM stereo radio module.
A: Move DVD,TV,MP3,MP4 and other built-in FM wide-band wireless receiver module. 
B: mining,business,campus,residential,tourist areas and other public places,stereo FM radio
system. 
C: wireless audio and wireless stereo headset functionality. 
D: GPS navigation, TV broadcasting systems and other wireless FM radio.
E: high-end game consoles and wireless audio electronic toys.
F: mobile phones,mobile phones,intercom systems,mobile radio devices and other stereo radio.
G: PDAS and Notebook PC and other peripheral applications.
 
Function:
A: using a common 102BC module package,users can directly replace the use,without changing the circuit design. 
B: high sensitivity,low noise,anti-interference ability,very few external components,small size (11*11.2MM Max),extremely simple to use. 
C: 76-108MHz FM band worldwide compatible(76-91MHz,including Japan,America and Europe 87.5-108.5MHz). 
D: I2C serial data communications bus interface,support for external reference clock input.
E: COMS technology fully integrated single-chip integrated circuits,power consumption is minimal.
F: built-in high-precision A/D(analog) and digital frequency synthesizer.
G: built-in LDO regulator,low power,wide voltage range(2.7-3.6VDC). 
H: built-in noise reduction, soft mute,bass boost circuit design.
I: 32 load high power audio output,headphone connections are direct,no external audio driver amplifier. 
J: the application is simple,low cost,cost-effective.
Color : show as pictures
PLS NOTE that due to lighting effects, monitor's brightness / contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item! 

 
What's new about V3.0.0
 
Optimize the circuit
 
Add Deep-Sleep jumper.
Default firmware: lastest MicroPython ESP8266 firmware.
 
 
Features
 
11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)
1 analog input(3.2V max input)
a Micro USB connection
Compatible with for MicroPython, for Arduino, for Nodemcu
lots of Shields
 
 
Package include:
 
 
Long femalepinsx2pcs 
Short female pins x2pcs
Normal pins x2pcs
for WEMOS D1 mini Boardx1pcs

 

 

Transmitter head and receiver template Product specifications and operating instructions
Receiver module parameters
Product Model: MX-RM-5V
Operating voltage : DC5V                quiescent current: 4MA
Receiving frequency: 433.92MHZ
Receiver sensitivity: - 105DB
Size : 30 * 14 * 7mm   external antenna: 32CM single core wire wound into a spiral
Technical parameters of the transmitter head
Product Model: MX-FS
Launch distance: 20-200 meters(different voltage, different results)    Operating voltage: 3.5-12V     Dimensions: 19 * 19mm
Ways of working: AM                transfer rate: 4KB / S          transmit power: 10mW
Transmitting frequency: 433M
An external antenna: 25cm ordinary multi-core or single-core line
Pinout from left → right: ( DATA ; VCC ; GND )
Application environment
Remote control switch, receiver module, motorcycles, automobile anti-theft products, home security products, electric doors, shutter doors, windows, remote control socket, remote control LED, remote audio remote control electric doors, garage door remote control, remote control retractable doors, remote volume gate, pan doors, remote control door opener, door closing device control system, remote control curtains, alarm host, alarm, remote control motorcycle remote control electric cars, remote control MP3 .

Chip Type: TEC1-12706
 
External dimensions: 40 * 40 * 3.75mm
Internal resistance: 2.1 ~ 2.4 (ambient temperature of 23 ± 1 'C, 1kHZ Ac test)
The maximum temperature difference:  Tmax (Qc = 0) above 59 'C.
Working current: Imax = 4.3-4.6A (rated at 12V)
Rated voltage: 12V (Vmax: 15V starting current 5.8A)
Cooling power: Qcmax 55W
Working environment: temperature range -55 'C ~ 83'C (high ambient temperature drop directly affect the cooling efficiency)
 
Description :
Get ice cold in minutes or heat to boiling by simply reversing the polarity, used for numerous applications from CPU coolers to alternate power sources, or even for your own
custom car drink warmer/cooler.
Since they consit primarily of semiconductor material sandwiched between ceramic plates and have no moving parts
These devices must be used in conjunction with a heat sink to avoid burned
Each device is full inspected and tested
Fitted with 6-inch insulated leads
 
 

TF card U disk MP3 Format decoder board module amplifier decoding audio Player
Features&Benefits:
l        Superior sound quality.Onboard 2Wmonoamplifier(5V power of up to 3W) is directlyconnected to the speaker(recommendation 4Ω3Wspeakers),3.5mm gold plated headphone jackcan connect with headphones or external audio.
l        With aMicroUSB port.Through the mobile phone data line can use mobile power supply or the USB cable to charge the MP3 battery,also can use 3.7V lithiumbattery,orUSB 5V power supply.
l        SupportTF Card(mobile phone memory card) andU diskplay mode.
l        No soldering with speaker terminals for easy wiring.
l        The module is designed to facilitate modification.
Product Overview:
1) Support MP3 format, playing power on automatically.When mp3 is played the red LED flashes.
2) Support U disk (test 32G), TF Card (test 16G) play mode; power on default TF card mode, if the TF card does not exist automatically jump to the U disk mode,and both devices have installed,then you can manually set the play mode.For details please see the key operating instructions.
3) Buttons can be adjusted up and down to control songs,volume up and down, pause or play, mode switching.For details please see the key operating instructions.
4) Press menu button enter the single/all song play mode.The default mode is the all song mode when power up.Pressing the Repeat button can replace the circulating mode.
Key Operating Instructions:
"Prev / V--" button: "Press" for switchingprevioussong, "long press" for volume down
"Next/v " button: "Press" for switchingnextsong, "long press" for volume up.
"P / P / Mode" button: "Press" for the "Play/Pause" Switch, "long press" for U disk, TF card mode.
"Repeat" button: "Press" for “single/all song" mode(no long press)
Note:
1."Long press" approximate 2S.
2 .If you use U disk mode, it is recommended 5V power supply, and some U disk does not support 3.7V power supply.
Product s Pecifications:
Power range: 3.7~5.5V
Product size: 45mm*36mm
Exquisite double board design, large area of copper, stable and reliable.
Using the anti-static bag exquisite packaging the module, to avoid the electrostatic damage in transit. .
Package included:
1  x   TF card U disk MP3 Format decoder board module amplifier decoding audio Player

Description:
Brand new and high quality
LCD display module with blue blacklight
Wide viewing angle and high contrast
Built-in industry standard HD44780 equivalent LCD controller
Commonly
used in: copiers, fax machines, laser printers, industrial test
equipment, networking equipment such as routers and storage devices
LCM type: Characters
Can display 2-lines X 16-characters
Operate with 5V DC
Module dimension: 80mm x 36mm x 12mm
Viewing area size: 64.5mm x 16mm

 
Item specifics
Brand Name:
ZT
Package Type:
Through Hole
Type:
LED
Model Number:
5mm White Colour LED
Colour::
White
Diameter::
5MM (F5)
Anode::
17MM
Cathode::
15.5MM
WD::
450-455 nm
VF::
3,2-3.4 V
IV::
14000-16000mcd
5mm White LED light emitting diode Bluecolor  
Dimensions:
5mm Round LED
Colour: White
Size (Diameter) : 5mm (F5) 
Anode (A) : Positive (long leg) =17MM
Cathode (K): Negative (shorter leg)=15.5MM
(ElectroStatic-Discharge) ESD=3000V
(Operation Temperature Range) Topr= -25C ~ 80C
(Storage Temperature Rage) Tstg= -40C ~ 100C
(Soldering Temperature) Tsol= 260C (5sec)

TTL to RS485 module 
 
Module highlights:
(1) 3.3V and 5.0V power perfect compatibility
(2) 3.3V and 5.0V signal perfect compatibility
(3) the absolute adopts imported chip, industrial design, strong anti-interference ability, at the same time, adopt more effective lightning protection design, 485 can be used in industrial field and field under the harsh environment, the working temperature of 40  to 85 , the transmission distance of km (with 850 m 2 * 1.5 cable testing, suggest use within 800 meters, more than 800 meters please add repeater)
(4) the half hole process design, plate thickness 0.8mm, can be easily as composite plate, can also be used for welding terminal
(5) has the RXD, TXD signal indicator lights, send and receive status panoramic view
The module features:
(1)This module fully considered485BusLightning protection designAnti interference Design When the long-distance transmission in the field, the "Earth" of the module is connected to the earth, which can play a very good role in anti interference and lightning protection.485Bus is more secure; indoor short distance transmission can not access the earth.
(2) with a standard2.54Spacing design to facilitate your two development
(3Have 120Ou matching resistance, short connectR0Can match the resistance, long distance transmission is recommended.
(4Support multi machine communication, allowing access to the most 128A device on the bus
(5This module can be hot plug, no other 485Chip hot swap signal plug phenomenon
(6Large area laying copper, preventing signal interference

 
This analog capacitive soil moisture sensor measures soil moisture levels by capacitive sensing, rather than resistive sensing like other types of moisture sensor
It is made of a corrosion resistant material giving it a long service life
Insert it into soil and impress your friends with the real-time soil moisture data
This module includes an on-board voltage regulator which gives it an operating voltage range of 3.3 ~ 5.5V
This sensor is compatible with DFRobot 3-pin "Gravity" interface, which can be directly connected to the Gravity I/O expansion shield
 
Features:
Supports 3-Pin Gravity Sensor interface
Analog output
 
Applications:
Garden plants
Moisture detection
Intelligent agriculture
 
Specifications:
Operating Voltage: DC 3.3-5.5V
Output Voltage: DC 0-3.0V
Interface: PH2.0-3P
Size: 99x16mm/3.9x0.63"
Quantity: 1 Set
 
Note:
Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
 
No Retail Package
Package Includes:
1 x Capacitive Soil Moisture Sensor
1 x Analog Sensor Cable
 

Product parameters:
Product size: 45 * 28mm
Operating voltage: DC5V
Communication: WIFI (ESP8266 module)
Serial communication parameters: 9600,8,1,0,0
Transmission distance: the maximum transmission distance of 400m (open environment, mobile phone equipped with WIFI module)
Load: 10A/250VAC 10A/30VDC, the relay pull 100,000 times
Way of working:
Mobile phone equipped with WiFi module;
Mobile phone and WiFI module equipped with the same router, through the mobile phone APP to control the relay; this mode, the transmission distance depends on the signal router.
Tips:
ESP8266 module has a timeout mechanism, when the phone for some time (the default 180S) did not give instructions to the module, the module will kick off the phone, the computer can send AT CIPSTO = to modify this time (Time range 0-7200), such as: AT CIPSTO = 3600.
When the module on the WIFI module is unplugged, USB to TTL module RX, TX, GND pins were connected to the module RX, TX, GND pin, IN , IN- 5V power supply, then the module can be used as a USB Relays to use, scalability.

Original STM32F103C8T6 ARM STM32 Minimum System Development Board Module For Arduino ST-Link V2 Mini STM8 Simulator Download
 

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

Nodemcu V3 Lua WiFi module integrated ESP8266 additional memory 32M FLASH, USB serial port ch340g
WiFi modern ESP8266 32MB,
The module is based on a wide range of exploration ESP8266 system chips from expressif.
WiFi modern ESP8266 32MB, compatible with nodemcu board.
The extra memory size is 32MB. This is better for big library projects. You do not have to worry about the size of the memory.
Usb-ttl serial converter ch340g, mini USB socket.
DC 4 ~ 9v PowerIn pin VIN.
Pins 2.54mm (0.1 ") 15 X 2-wire pin set. Do not solder.
Combined with WiFi access points and featured stations microcontrollers using Lua programming language based on simple.
WIFi modern ESP8266 32MB,
Provide: Hardware IO. Can be used in the IDE event-driven API network application 10 d0-d10, PWM function programming, IIC and SPI communication, in a board WiFi wireless network and ADC (A0, etc. can be used as access points and / or stations, host servers ), Connect to the Internet, get or upload data. Developing panels can be used in developing countries.

This is a WS2812 or WS2812B RGB LED controller based on the ESP-01 /ESP-01S. With this board, your will easy to make your colorful display project by Arduino IDE.
Feature:
*Main chip:ESP-01/ESP-01S(This board Not include the ESP-01/ESP-01S)
*Interface:3Pin PH2.0 for WS2812
*Working voltage:DC 3.7V-5V (Support 3.7V Lipo battery)
Usage:
1.Power supply:3.7V Lipo battery connect to the VCC GND (2.54mm male header)
2.Upload the code to ESP-01S(ESP-01)
3.Plug the ESP-01S(ESP-01) to the module

[Description]
 
1, RFID-RC522 module one;
2, the standard S50 blank card one;
3, S50 shaped cards one (as shown keychain shape);
4, vertical, curved row of pins each one;
Note: The relevant technical details and the development of routines, etc. Want to contact customer service request, please buy download address.
Mainly includes the following:
A, supporting reference materials;
B, mainstream processors (including MSP430F149) RC522 module for this application C program;
RC522 chip [Introduction]
  MF RC522 is applied to 13.56MHz contactless communication highly integrated chip card reader, is NXP for the "Three Tables" application launch of a low-voltage, low-cost, small size and non-contact card reader chip, smart instrumentation and portable handheld devices developed better choice. MF RC522 using advanced modulation and demodulation concept completely integrated in all types of 13.56MHz passive contactless communication methods and protocols. Support 14443A compatible transponder signals. The digital part handles ISO14443A framing and error detection. In addition, support fast CRYPTO1 encryption algorithms, terminology validation MIFARE products. MFRC522 supports MIFARE Series higher speed non-contact communication, two-way data transfer rates up to 424kbit / s. As a highly integrated 13.56MHz card reader new family of chips, MF RC522 MF RC500 and MF RC530 and there are many similarities, but also have many features and differences. It is between the host communication using SPI mode, helps to reduce connection, reduce PCB board size and cost.
[Introduction] RFID module
    MF522-AN module adopts Philips MFRC522 original reader circuit chip design, easy to use, low cost, suitable for equipment development, development of advanced applications such reader users, the need for RF card terminal design / production of the user. This module can be loaded directly into a variety of readers molds. Module uses voltage of 3.3V, through the SPI interface simple few lines can be directly connected to the user any CPU board communication module can guarantee stable and reliable work, reader distance;
Electrical parameters [Introduction]
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: mifare1 S50, mifare1 S70, mifare UltraLight, mifare Pro, mifare 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%
[Module Interface SPI Parameters
Data Transfer Rate: Max. 10Mbit/s