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Motion sensor HC-SR501 IR (HC-SR501)

HC-SR501 IR motion sensor

You can use this 3-pin PIR sensor to detect people and animals from up to 20 feet away. It has configurable timing and can be enabled for single or repeat signaling.


  • Voltage: 5V – 20V

  • Power Consumption: 65mA

  • TTL output: 3.3V, 0V

  • Lock time: 0.2 sec

  • Trigger methods: L – disable repeat trigger, H enable repeat trigger

  • Sensing range: less than 120 degree, within 7 meters

  • Temperature: – 15 ~ +70

  • Dimension: 32*24 mm, distance between screw 28mm, M2, Lens dimension in diameter: 23mm

R46  Inc Tax
3D Touch sensor auto bed leveling
BL Touch sensor for 3D printer Auto-Bed Leveling 

-This is an auto leveling sensor for 3D Printers based on open-source design. 
-Contact sensor


-Additional power supply might be needed if the current supplied by the printer main-board is not high enough. 
-Electronic devices can be damaged or even destroyed if connected incorrectly.
-The action of pulling/pushing hard on the push-pin can damage sensor.
-Fix push-pin with locking paint after reassembling or adjusting core.
-Please do not change the position of the hex screw(core).

Package Included:

1 X Sensor
1 X 3Pin Straight Pin
1 X 2Pin Straight Pin 
2 X Screw & Nut & Washer
2 X Dupont Housing Shell 3Pin
2 X Dupont Housing Shell 2Pin    
10X Dupont Terminal
1 X 10KΩ 1/8W Resistor for Smoothieboard

Some links you may like to visit 
Video showing the sensor in use

Datasheet in PDF

R820  Inc Tax
Anet A8 Proximity Probe for bed leveling
This is the Anet A8's specific expansion kit for bed leveling. The probe works on a 5 volt logic and has an acrilic mounting plate specifically designed for the Anet A8.
R69  Inc Tax
BMP280 Pressure Sensor Module High Precision (BMP280)

Bosch has stepped up their game with their new BMP280 sensor, an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. This sensor is great for all sorts of weather sensing and can even be used in both I2C and SPI!
    This precision sensor from Bosch is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy
Enhancement of GPS navigation

    e.g.time-to-first-fix improvement,dead-reckoning,slope detection
    Indoor navigation(floor detection,elevator detection)
    Outdoor navigation,leisure and sports applications
    Weather forecast
    Health care application(e.g. sirometry)
    Vertical velocity indication(e.g. risk/sink speed)
    Target devices
    Handsets such as mobile phones ,table PCs,GPS devices
    Navigation systems
    Portable health caredevices
    Home weather stations
    Flying toys
    PCB size:(L*W)1.52* 1.20cm/0.60"*0.47"

R41  Inc Tax
Compass GY-273

The HMC5883L is a triple-axis magnetometer compass, which uses I2C for communication.

Compass heading accuracy of 1° to 2°, provided by internal 12-bit ADC (Analog-to-Digital Converter).

Includes on-board voltage regulator, allowing you to power the module with voltages between 3.3V and 6V.

The module includes on-board pull-up resistors on the I2C lines.

There is a data ready pin (pin DRDY) you can use to make your communication with the module more efficient; refer to the datasheet below for details.

Since this module has such great compass heading accuracy, it is great for giving your robot precise navigation abilities.

  • 1 — HMC5883L Triple-Axis Magnetometer Compass GY-273 Module
  • 1 — 1x5 pin male header
Supply Voltage VCC3.3 to 6 V
Heading Accuracy1° to 2°
Magnetic Field Range-8 to +8 Gauss
I2C Address0x1E (7-bit address)
Max Data Rate160 Hz
Digital Voltage Level3.3V
Dimensions (excluding pins)
Length18.2mm (0.717")
Width13.3mm (0.524")
Height2.2mm (0.087")
Weight0.95g (0.034oz)
R83  Inc Tax
Humidity Sensor Module DHT11 Resistive Digital HVAC Dehumidifier Equipment HC

HVAC,Dehumidifier,Testing and inspection equipment,Car,Automatic control
Data Logger,Weather Stations,Appliances,Humidity regulator
Long-term stability,Fast response,Anti-interference ability
Long distance signal transmission,Digital signal output,Accurate calibration

Humidity measurement range :20-90% RH
humidity measurement accuracy: ?5% RH
Operating voltage: DC5V
Dimension:3.3 x 1.8 x 1.3cm(L x W x H)
Cable length:20cm
Color:As the pics show
Net weight:6g
Package weight:16g
R46  Inc Tax
Infra-red obstacle avoidance Sensor
  • Module description :
  •     The sensor module light is adaptable to the environment, it has a pair of infrared transmitting and receiving tube, tube infrared emit a certain frequency, when detecting direction meet with obstacles (reflecting surface), reflected infrared receiving tube, after the comparator circuit processing, green indicator will light up, at the same time signal output interface to output digital signal (a low level signal), can be through the potentiometer knob adjust the detection distance, effective distance range 2 ~ 30cm, working voltage is 3.3V to 5V. The sensor detection range can be through the potentiometer to adjust and have small interference, easy to assemble, easy to use, etc, can be widely used in robot obstacle avoidance, obstacle avoidance car, line count, and black and white line tracking and so on many occasions.
  • Module parameters:
  • 1. when the module detects obstacles in front of the signal, the green indicator on the circuit board light level and at the same time the OUT port output low level signal, the detection module from 2 ~ 30cm, 35°detection Angle, test distance can be adjusted through the potentiometer, adjustable potentiometer clockwise, the detection distance increases; Counter-clockwise tuning potentiometer, detection distance is reduced.
  • 2. sensors, active infrared reflection detection, therefore the reflectivity and shape of the target is the key of the detection range. White one black detection range, minimum maximum; Small area of the object distance, large distance.
  • 3. the sensor module output port OUT can be directly connected to the microcontroller IO port can, also can drive a 5v relay directly; Connection mode: the VCC - VCC; GND - GND; The OUT - the IO
  • 4. the comparator USES the LM393, working stability;
  • 5. can be used for 3 to 5v dc power to power supply module. When power on, the red power indicator light lit;
  • 6. 3 mm screw holes, easy fixed, installation;
  • 7. circuit board size: 3.2CM*1.4CM
  • 8. each module is shipped already compare threshold voltage through the potentiometer to adjust good, not special circumstances, please do not arbitrarily adjust the potentiometer.
  • Module interface specification 
  • 1. VCC voltage is 3.3V to 5V converter (which can be directly connected to 5V single-chip microcontroller and 3.3V) 
  • 2. GND external GND 
  • 3. OUT of small plate digital output interface (0 and 1)
R23  Inc Tax
Light sensor BH1750
Digital light intensity detecting.
The ROHM genuine BH1750FVI chip.
Power supply :3-5v.
Data range :0-65535.
The sensor built 16bitAD converter.
Direct digital output, complex calculation is omitted, omitting calibration.
Does not distinguish between ambient light.
Close to the visual sensitivity of the spectral characteristics.
1 lux high-precision measurement of a wide range of brightness.
R40  Inc Tax
MAG3110 magno 3Axis

Size: 16mm * 17mm
Integrated 5V to 3.3V chip, more convenient for 5V power supply microcontroller system
I2C compatible 3-5V system

Package included:

1 x Sensor

R58  Inc Tax
MCP9700A-E/TO 9700 Low-Power Linear Active Thermistor Sensor Microchip
Linear Active Thermistor™ ICs are sensors whose output voltage is directly proportional to measured temperature. The MCP9700 can accurately measure temperature from -40C to +150C. The output of the MCP9700 is calibrated to a slope of 10mV/°C and has a DC offset of 500mV. The offset allows reading negative temperatures without the need for a negative supply. The MCP9700 is packaged in space saving 5-pin SC-70 packages, making it ideal for space-critical and low-cost applications.
R17  Inc Tax
Microphone Sensor AVR PIC High Sensitivity Sound Detection Module


Microphone Sensor AVR PIC High Sensitivity Sound Detection Module For Arduino



Product Description

  100% Brand new and high quality
  For sound detection module has two outputs:
  1. AO, analog output, real-time output voltage signal of the microphone
  2. DO, when the sound intensity reaches a certain threshold, the output high and low signal
  Module features:
  1. There is a mounting screw hole 3mm
  2. The use 5v DC power supply
  3. With analog output
  4. There are threshold level output flip
  5. High sensitive microphone and high sensitivity.
  6. A power indicator light
  7. The comparator output is light

R35  Inc Tax
photointerupt sensor module


This module can be used to build a simple circuit that produces a photo interrupter warning lamp. It is composed of an infrared emitter on one upright and a shielded infrared detector on the other. By emitting a beam of infrared light from one upright to the other, the sensor can detect when an object passes between the uprights, breaking the beam. Used for many applications including optical limit switches, general object detection, etc.

R23  Inc Tax
Photoresistor LDR CDS 5mm GL5516

In pitch-black conditions, the photocell’s resistance will be in the megaohm’s (1.0MΩ+) range. Shining an LED on the sensor can drop the resistance to near-zero, but usually the resistance of the photocell falls between 8-20kΩ in normal lighting conditions.

By combining the photocell with a static resistor to create a voltage divider, you can produce a variable voltage that can be read by a microcontroller’s analog-to-digital converter.

R12  Inc Tax
Piezo speaker (27mm)
  • Uncased piezo elements
  • Speech and music applications
  • Wide tonal response
  • 12mm with flying leads
  • Resonant frequency(KHz)       Fs=9.0±1.0
    Resonant impedance(Ω)      Rr≤500Ω
    Capacitance at 120Hz(NF)    Co=11±30%
    Operating Temperature(℃) -20∽+70
    Storage Temperature(℃)     -30∽+80
  • Color: As the pictures shown
  • Material: Copper,PVC
R14  Inc Tax
Rain Sensor
Product use: rain, rain sensor, can be used for all kinds of weather monitoring, and translated into output signals and AO.
The sensor USES the high quality FR - 04 double material, large area of 5.5 * 4.0 CM, treatment of nickel plating and surface, have fight oxidation, electrical conductivity, and life has more superior performance;
The comparator output, signal clean, good waveform, driving ability is strong, for more than 15 mA;
With potentiometer sensitivity adjustment
The working voltage of 3.3 V to 5 V
The output format: digital switch output (0 and 1) and analog AO voltage output;
Has a fixed bolt hole, convenient installation
Small board PCB size: Approx. 3.2 cm x 1.5 cm
The LM393, use of wide voltage comparator

Package Included:

1X Humidity Detection Sensor Module Snow Rain raindrops Detection For Arduino
R35  Inc Tax
Soil Hydrometer Sensor
This is a simple water sensor, which can be used to detect soil moistureDual output mode, analog output is accurateA fixed bolt hole for easy installationWith power indicator (red) and digital switching output indicator (green)LM393 comparator chip, stableSpecifications:VCC: 3.3V-5VGND: GNDDO: digital output interface(0 and 1)AO: analog output interfacePanel PCB Dimension: 3 x 1.5 cmSoil Probe Dimension: 6 x 2 cmWire length: 21 cmNet weight:11 gPackage weight:21 gColor: Random DeliveryPackage Content:1 x Soil Moisture Detector Module 1 x Probe 5 x Jumper Cables
R35  Inc Tax
Thermistor wires 100k (100kOhm)
STD 3D printer 100k Ohm thermistor with no fly leads. Comes in a pack of 1 pcs
R9  Inc Tax
Thermistor without wires100k 10pcs (100kOhm)
STD 3D printer 100k Ohm thermistor with no fly leads. Comes in a pack of 10 pcs
R41  Inc Tax
Tilt sensor
Tilt Angle Module Vibration Sensor Module for Arduino STM32 AVR
PCB board size: 16*14mm
location hole diam: 3.1mm
with Free cable
Working Voltage: 3.3-12V
R40  Inc Tax
touch sensor


The module is based on a touch-sensing IC (TTP223B) capacitive touch switch. In the normal state, the output of the module is low; when a finger touches the corresponding position, the module output becomes high, if not touched for 12 seconds, the module switches to low-power mode

R35  Inc Tax
Ultrasonic Ranging Sensor (HC-SR04)


This HC-SR04 has stable performance and high ranging accuracy.


  • Power Supply : 5V DC
  • Effectual Angle : < 30 degrees
  • Ranging Distance : 2cm to 500 cm
  • Resolution : 1cm
  • Ultrasonic Frequency : 40kHz
R46  Inc Tax
Ultrasonic sensor Bracket (HC-SR04)


This bracket is for the HC-SR04 sensor
R7  Inc Tax
Ultrasonic tracking Arduino kit car

Mechanical structure is simple and very easy to install (you have to program by yourself). Car comes with L298N driver module and four tracking modules. 

Package includes:

1 x Car chassis
2 x Car Wheels
1 x DC Gear Motor
2 x 20 line gun code disk
4 x Fasteners (high intensity black acrylic)
1 x Caster
1 x Four battery box
1 x Quality Rocker Switch
1 x V5 shield
1 x UNO R3
1 x SG90
1 x FPV
1 x L298N
Several screws and nuts
R541  Inc Tax
Water flow sensor DFROBOT


  • Inner Diameter: 11 mm
  • Outside diameter: 20 mm
  • Proof Water Pressure: <1.75 MPa
  • Water Flow Range: 1-30 L/min
  • Voltage Range: 3.5~12 V
  • Operating Current: 15 mA (DC 5V)
  • Insulation Resistance: >100 MΩ
  • Accuracy: ±5% (2~30L/min)
  • The Output Pulse High Level: >4.7 VDC (DC input voltage 5 V)
  • The Output Pulse Low Level: <0.5 VDC (DC input voltage 5 V)
  • Output Pulse Duty Ratio: 50% ± 10%
  • Water-flow Formula: 1L = 450 square waves
  • Working Humidity Range: 25% ~ 95% RH (no frost)
  • Dimension: 62*36*35 mm/2.44*1.37*1.37 inches
  • Weight: 52g
R239  Inc Tax
Water Level Sensor


The water-level sensor is used to indicate the level of water in an overhead tank, by using this we can avoid the overflow of water , and at any time we can know the level of water in a tank, it has a simple circuit.

R53  Inc Tax
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