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Description :

The 4 Way relay can trigger high voltage, high current load such as Motor, Lamps , AC load.

It can control by microcontroller such as PIC, Arduino , Rasperry Pi , NodeMCU and more.

The Relay board inside build in 4 units of Opto-Isolator IC 817C.


Specification :

- Digital 5V Output controllable.

- 10A Maximum Current

- Maximum Voltage : 250v AC / 30v DC



Opto-Isolator IC 817C: https://en.wikipedia.org/wiki/Opto-isolator


Package Include: 1* 4 Channel Ways Opto Isolator Relay Module


#Relay #Module



DHT22 output calibrated digital signal.

Utilizes exclusive digital-signal-collecting-technique and humidity sensing technology, assuring its reliability and stability.

Sensing elements is connected with 8-bit single-chip computer. 

Every sensor of this model is temperature compensated and calibrated in accurate calibration chamber and the calibration-coefficient is saved in type of programme in OTP memory, when the sensor is detecting, it will cite coefficient from memory.

Small size & low consumption & long transmission distance(20m) enable DHT22 to be suited in all kinds of harsh application occasions.

Single-row packaged with four pins, making the connection very convenient



Low cost

3 to 5V power and I/O 2.5mA max current use during conversion (while requesting data)

Good for 0-100% humidity readings with 2-5% accuracy

Good for -40 to 80°C temperature readings ±0.5°C accuracy

No more than 0.5 Hz sampling rate (once every 2 seconds)

Body size 15.1mm x 25mm x 7.7mm

4 pins with 0.1" spacing

Package Includes: 1* DHT22


#dht #dht22 #humiditymodule #temperaturesensor



This is a sound sensor module that detects surrounding sound through the microphone.

The sensitivity of the sensor can be tuned using the onboard potentiometer.

The main chip LM393.

Signal is clean

Waveform is good

Driving ability is strong.



- Build in potentiometer can be used to adjust the threshold level.




A variety of platforms including Arduino / AVR / ARM/PIC.



Type: Sensor

Sensor Function: Sound

Dimension(cm): 4.3 x 1.7 x 1

Net Weight(kg): 0.007

Package included: 1x Sound sensor module (Microphone trigger switch, LM393)


#soundsensor #mic #micmodule #soundmodule


As electronics enthusiasts , you are not 'll find a 3.3V power supply and tangled, is not the will to power is not enough to expand the number of interfaces and distress ? Such experience , I believe that people will engage in electronic design often encountered . To facilitate that we can find a safe high performance , ease of use , power regulator rich expansion interface module , shop designed in such a transfer 3.3v 5v power regulator module, which applies to single-chip design project requires 3.3V power supply electronic equipment. Meanwhile , some of the electrons can be designed to facilitate the expansion of power .



1. Input : DC 4.5V--7V ( input voltage must be higher than the output voltage to 1V or more. )

2. Output : 3.3V, 800mA ( load current must not exceed 800ma)

3. pairs of panel design, layout nice

4. specially designed two pin mounting holes , can be directly fixed on hole board for extended experiments  

5. input and output using 2P single row pin for easy connection

6. PCB board size : 2.5cm * 1.1cm

7 . with power indicator light ( red )

8. tablet weight about : 1.6g

9. Pin is not soldered

Package Included: 1*AMS1117-3.3V Step Down power module


#AMS1117 #3.3V #StepDown #power #module



This IIC Serial I2C LCD Adapter Board, can be connected to a standard HD44780 compatible 16×2 or 20×4 Character Display Module that supports 4 bit mode. All Character Modules sold on our site support 4 bit mode, and nearly all commercially available 16×2 and 20×4 line character modules support it too.


This board has a PCF8574 I2C chip that converts I2C serial data to parallel data for the LCD display. There are many examples on internet for using this board with Arduino. Do a search for “Arduino LCD PCF8574”. The I2C address is 0x3F by default, but this can be changed via 3 solder jumpers provided on the board. This allows up to 3 LCD displays to be controlled via a single I2C bus (giving each one it’s own address).


Features IIC/I2C :

*   Arduino 1602 I2C interface 4-wire 1602 screen.

*   IO port of Arduino control board is only 20, so IO ports is not enough for many sensor, SD card, relay modules.

*   The original 1602 screen need 7 IO ports to drive up, and this module can save 5 IO ports

*   This is another great IIC/I2C/TWI/SPI Serial Interface. With this I2C interface module, you will be able to transfer data via only 2 wires. If you already have I2C devices in your project, this LCD module actually cost no more resources.

*   I2C Address: 0X20~0X27 (the original address is 0X20,you can change it yourself)

*   Supply voltage: 5V

*   The backlight and contrast is adjusted by potentiometer

*   Come with 2 IIC interface, which can be connected by Dupont Line or IIC dedicated cable

*   Compatible with 1602 LCD


Package includes :1x I2C Adapter for 1602 or 2004 Character LCD


Download library for I2C LCD display



#lcd1602 #lcdi2c #arduinolcd #arduinolcdi2c #lcd1602i2c #lcdi2c1602 #i2c #arduino #lcd2004


Relay contact capacity 250V10A.

Relay output normally open and normally closed.

Active low level. Relay signal input voltage range: 0-5v.

VCC system power supply.

Jd-vcc relay power supply. Jd-vcc and VCC short connection will be ok.


Module parameters:

1. Size: 50.5mm(length)*38.5mm(width)*18.5(height)

2. Weight: 31g

3.PCB color: black

4. There are 4 fixed screw holes around the board with a diameter of 3.1mm for easy installation and fixation

5. The relay adopts high-quality songle relay with single pole and double throw. A common end, a constant start, and a constant close end

6. Optocoupler isolation, good anti-interference

7. Low level suction, high level release. The status indicator light is on when suction is close, and the status indicator light is off when release is close

8.VCC is the system power supply and JD_VCC is the relay power supply. Plug in the jumper cap.


Electrical parameters:

Power supply voltage: 5VDC

Current: over 100mA

Load: 250V 10A ac or 30V 10A dc


Wiring instructions:

VCC: positive pole of system power supply

GND: system power negative pole

IN1--IN2: relay control port


JT308 USB 125KHz RFID Card Reader


Support µEM4001, 4100, or its compatible RFID, ID card.

Frequency: 125Khz

Read first 10 digits of the RFID/Proximity card.

Support Windows95/98/2000/XP/7/8/10.

Communication speed: 106Kbit/s

Power: DC 5V(±5%)

Reading distance: 5-8cm

Interface: USB

Operating temperature: -10? ~ +70?

Storage temperature: -20? ~ +80?

size: L × W × H) 10.8x7.8x2.8cm

Weight: 70g. with USB Cable: 100g

Color: black ( The same as the web photo )


Installation Instructions:

First: Connect the usb cable with the card reader to the computer USB port.

Second: The reader will 'drip' sound and flash about that power successfully, and then half a second after the 'drip' sound and flash about that device self-test successfully, without Install any drivers, windows will automatically recognize it.

Third: Open EXCEL or WORD ,the card number would be input by self .


Package include: 1 x new USB ID card reader + 1x USB cablle


#USB #RFID #Reader #JT308 #Card #ID



100% brand new and high quality!

Military-grade double-layer circuit board design.

Comes with a heat sink.

Two-way high-power thyristor with a limit current of up to 100 amps.

Such as electric furnace, water heater heating, lighting dimming, small motor speed, electric iron temperature adjustment.

General household appliances or small factories are enough.



Color: as shown

Use voltage: AC 220V

Maximum power: 10000W Resistive load limit power, room temperature is recommended for 5000W for a long time

Voltage regulation: 0-220v starts at around 20

Size(approx): 130*60*47mm


1 pc x Voltage Regulator


#Voltage #Regulator #AC #220V #10000W #SCR #Motor #Speed #Home #Electronic #Parts #High #Power #Controller #Heat #Sink



Arduino robot Kit, rain, rain sensors, monitoring can be used in various weather conditions, and go into several signal and the AO output. Sensor using high quality material on both sides, oversized 5.0*4.0CM, with nickel plated surface against oxidation, electrical conductivity, and life more superior performance.

Comparator output signal clean wave good driving ability, than 15mA;

Power adjust sensitivity;

Rated voltage and 3.3V-5V Output: digital switching output (0 and 1) and AO analog voltage output;

With fixing bolt holes for easy installation

Small Board PCB dimensions: 3.2cm x 1.4cm Using wide LM393 voltage comparator



Connected to 5V power supply, power light is on, when there is no water droplets on the induction plate, DO output is high, the switch light is off, and drops on a drop of water, DO for low-level output, switch light is on.

Brush away water drops, but it returned to output high level State.

AO analog outputs, to connect to SCM AD size detection of rainfall over it.

DO TTL digital output can be connected to microcontroller detects rain.


Connection mode:

VCC: supply cathode (3-5V)

GND: connect to power negative

DO:TTL switch signal output

AO: analog signal output


Package includes: 1x Rain Sensor Module + 1x Female to female 2p jumper wire


#Rain#Sensor #Module



It is another great blue backlight LCD display.

As the pin resources for Arduino controller is limited, your project may be not able to use normal LCD shield after connected with a certain quantity of sensors or SD card.

With this I2C interface LCD module, you will be able to realize data display via only 2 wires.

If you already has I2C devices in your project, this LCD module actually cost no more resources at all.

It is fantastic for Arduino based project.



Material: electronic element

Color: black & green

Size: 150*100mm

Package Includes: 1 x LCD Keypad Shield Board 1602

LCD main technical parameters:

Display Capacity: 16 × 2 character Chip

Operating voltage :4.5-5 .5 V

Working current: 2.0mA (5.0V)

Module optimum operating voltage:5.0V

Module size:20.5mm × 41mm/0.81 x 1.61 inch

Module Weight:57g 1602


#Arduino #LCD1602 #LCD #screen #board #LCD #Keypad #Shield


This soil moisture sensor measures soil mositure levels by capacitive sensing rather than resistive sensing like other sensors on the market.

It is made of corrosion resistant material which gives it an excellent service life.

Insert it in to the soil around your plants and impress your friends with 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.

It is perfect for low-voltage MCUs, both 3.3V and 5V.

For compatibility with a Raspberry Pi it will need an ADC converter.

This soil moisture sensor is compatible with our 3-pin "Gravity" interface, which can be directly connected to the Gravity I/O expansion shield.



Gardening & Farming

Moisture Detection

Intelligent Agriculture



Operating Voltage: 3.3 ~ 5.5 VDC

Output Voltage: 0 ~ 3.0VDC

Operating Current: 5mA

Interface: PH2.0-3P

Weight: 15g

Package List: 1 * Capacitive Soil Moisture Sensor

#Soil #Moisture #Sensor #Corrosion #Resistant #Capacitive #Wide #Voltage #Garden #Watering #Control #DIY #Plant #Switch



Smart Car Chassis Robotic Tire + DC Geared Motor Kit Wheels Wheel Motor

Model: 1:48 reduction TT motor

Power mode: DC

Voltage: 6V

Motor working voltage 3-6V

Package Included : 1 DC gear motor + 1 wheel = 1 set


#Tires #DC #Gear #Motors #Smart #Trolley #Chassis #Robot #Set #Wheels



Bluetooth module HC-05 Master and slave Two in one module.

Button: Press the button, the module enter the AT mode. AT commands are executed only in AT mode.

6 PIN Dopunt Cable : with this Dupont Cable, you can easily connect this HC-05 Bluetooth module to your for Arduino Board.

HC-05 Bluetooth module provides switching mode between master and slave mode which means it able to use either receiving or transmitting data.

With this HC 05 Bluetooth module,You can quickly add the Bluetooth feature to your Arduino project, and then you can use your android phone to control some gadgets, such as: switch, LED.



Material: metal.

Size: 26.7*13mm.

Color: show as pictures.


Package include: 1 * HC-05 Module.


#HC-05 #Wireless #Module #Anti-reverse #RF #Transceiver #Wireless #Bluetooth #Serial #Board


Stepper Motor 5V 4-Phase 5-Wire & ULN2003 Driver Board


The rotation angle of the motor is proportional to the input pulse.

The motor has full torque at standstill(if the windings are energized)

Precise positioning and repeatability of movement since good stepper motors have an accuracy of – 5% of a step and this error is non cumulative from one step to the next.

Excellent response to starting/stopping/reversing.

Very reliable since there are no contact brushes in the motor. Therefore the life of the motor is simply dependant on the life of the bearing.

The motors response to digital input pulses provides open-loop control, making the motor simpler and less costly to control.

It is possible to achieve very low speed synchronous rotation with a load that is directly coupled to the shaft.

A wide range of rotational speeds can be realized as the speed is proportional to the frequency of the input pulses.



Model : 28BYJ-48

Rated voltage : 5VDC

Number of Phase : 4

Speed Variation Ratio : 1/64

Stride Angle : 5.625° /64

Frequency : 100Hz

DC resistance : 50Ω±7%(25℃)

Idle In-traction Frequency : > 600Hz

Idle Out-traction Frequency : > 1000Hz

In-traction Torque >34.3mN.m(120Hz)

Self-positioning Torque >34.3mN.m

Friction torque : 600-1200 gf.cm

Pull in torque : 300 gf.cm

Insulated resistance >10MΩ(500V)

Insulated electricity power :600VAC/1mA/1s

Insulation grade :A

Rise in Temperature <40K(120Hz)

Noise <35dB(120Hz,No load,10cm)


Stepper Library for Arduino



Package Include: 1* 5V 4-Phase Stepper Motor + 1*ULN2003 Driver Board


#steppermotor #uln2003 #driverboard



16 x 2 characters LCD display

Blue backlight white character

Built in controller (HD44780 or equivalent)





Arduino Tutorial:



Package Included: 1pcs * LCD 1602 (2x16) Basic Character Blue Backlight Display LCD1602


#LCD #1602 #LCD1602 #arduino