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It has good sensitivity to carbon monoxide in wide range, and has advantages such as long lifespan, low cost and simple drive circuit.

High sensitivity to carbon monoxide  

Stable and long life



Domestic gas leakage detector

Industrial CO detector

Portable gas detector


Package included:  1set x MQ-7


#MQ-7 #MQ7 #Carbon #Monoxide #CO #Gas #Sensor #Detection #Module #gas #detection #alarm #sensor #module


New DC3V-6V DC Geared Motor TT For Robot Smart Car Chassis DIY Anti-interferen E


Use scope: scientific electronic products, robot electric body, bubble gun toy gun body, 4WD toy car, toy plane class, class products such as vibration electric toy products

[product] straight bi-axial reducer motor

[type] 1; 48 [

description] with strong magnetic, anti interference

Voltage no-load current no-load speed

6V = 200mA 200 + -10% rpm

3V = 150mA 90 +- 10% rpm

Package Include: 1 x dual shaft gear motor


#TT #DC #E #DC3V-6V #Car #Geared #For #Chassis #Motor #Smart #Robot #Anti-interferen #DIY #New #Chassis-DIY #DC3V-6V-DC #Robot-Smart #Geared-Motor


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



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


NEW Arduino Compatible ATMEGA328P Nano V3.0 + USB Cable

Microcontroller ATmega328P


Technical Parameters:

Using Atmel Atmega328P MCU

8 Analog input ports: A0 ~ A7

14 Digital input / output ports: TX, RX, D2 ~ D13

6 PWM ports: D3, D5, D6, D9, D10, D11

1 Pair of TTL level serial transceiver ports RX / TX

DC Current per I/O pin: 40Ma

Flash Memory: 32KB



Clock Speed: 16MHz

There is bootloader installed in it

Support USB download and Power

Support for external 5V ~ 12V DC power supply

Support power supply by 9V battery

Support ISP download

Dimensions: 0.73”x1.7”, 45(L)x18(W)mm



Download The open-source Arduino Software (IDE) Windows & Mac OS https://www.arduino.cc/en/Main/Software

Package Include : 1* Arduino Compatible Nano with ATMEGA328P Module + Cable


#arduinonano #arduinouno #arduinonanoatmega328p #atmega328p #arduino



The FT232R is a USB to serial UART interface A low-cost way to add USB capability to For Arduino or other microcontrollers. Use this to give your own breadboard For Arduino USB capability for bootloading or downloading sketches.

100% brand new

Support 3.3V, 5V

Chipset FT232RL

USB power has over current protection, using 500MA self-restore fuse

RXD/TXD transceiver communication indicator

Pin definition: DTR,RXD,TX,VCC,CTS,GND


Module size:36mm(length)*17.5mm(width) 

Package Included: - 1 x FT232RL 3.3V 5.5V FTDI USB to TTL Serial Adapter Module for Arduino


#arduino #arduinouno #arduinounor3 #arduinor3 #electronics #microcontroller #Atmega328P #ISP #FT232RL #FTDI #USBtoTTL #ArduinoProMini #Programmer #ArduinoProgrammer



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


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



High Quality MQ-2

Smoke Gas LPG Butane Hydrogen Sensor Module for Arduino

MQ2 Smoke Gas Detector Module for Arduino



Operating Voltage is +5V

Can be used to Measure or detect LPG, Alcohol, Propane, Hydrogen, CO and even methane

Analog output voltage: 0V to 5V

Digital Output Voltage: 0V or 5V (TTL Logic) Can be used as a Digital or analog sensor

The Sensitivity of Digital pin can be varied using the potentiometer

MQ-2 Gas Sensor

Sensitive for LPG, propane, hydrogen, Combustible Gas, Smoke

Output voltage boosts along with the concentration of the measured gases increases

Fast response and recovery

Features boost circuit


Package Included: 1* MQ2 Smoke Gas Seonsor Module

#MQ-2 #Smoke #Gas #LPG #Hydrogen #Sensor #Detector #Module #MQ2 #Arduino



PAM8403 is a 3W, class-D audio amplifier.

Offers low THD+N allowing it to achieve high-quality sound reproduction.

New filterless architecture allows the device to drive the speaker directly. 

Requiring no low-pass output filters.

Saving system cost and PCB area.

Efficiency of the PAM8403 is much better than that of Class-AB cousins.

Can extend the battery life, which makes it well-suited for portable applications.



The Infrared Barrier Module is able to adapt to the environment light very well. Having a pair of infrared transmitter and receiver tube, the transmitter consistently emits a certain frequency. When an obstacle with reflective surface is encountered, the infrared reflected back is received by the receiver & sent to the comparator circuit for processing. The green light will lit and output digital signal (low). The detection range can be adjusted via the potentiometer knob.


#Outdoor #obstacleavoidancesensor #Cars #Robot #smartphonecarmount #modular #lm393 #infraredobstacleavoidance #Sensors



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



The EasyDriver is a simple to use bipolar stepper motor driver that supports microstepping. It can be used to control 3-axis CNCs, robots, home appliances, etc. It's compatible with any source that can output a digital 0 to 5V pulse (or 0 to 3.3V pulse if you solder 3/5V pads). Board is powered by 7V to 30V supply to power stepper motors with any voltage. It has an on board voltage regulator for the digital interface that can be set to 5V or 3.3V. Connect a 4-wire stepper motor and a microcontroller and you've got a precision motor control. EasyDriver drives bipolar motors, and motors wired as bipolar. I.e. 4, 6, or 8 wire stepper motors.

This is the newest version of EasyDriver V4.4. It provides much more flexibility and control over your stepper motor, when compared to older versions. The microstep select (MS1 and MS2) pins of the A3967 are broken out allowing adjustments to the microstepping resolution. The sleep and enable pins are also broken out for further control. Note: Do not connect or disconnect a motor while the driver is energized. This may cause permanent damage to the A3967 IC.


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