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Sensors

These sensors are the eyes and ears of your electronics projects. Just add one to give your project sensing abilities!

Mercury Tilt Switch 5mm
Use this tilt switch to detect motion. When the switch is tilted one way, the mercury will roll down the tube and make contact between the 2 leads.

$1.89
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Optical Limit Switch / Endstop...
This Optical Limit Switch / Endstop tells your 3D printer when it has reached the end of a rail using an optical sensor instead of a mechanical switch.

$4.49
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USB RFID Reader 125kHz
Plug this RFID reader into your computer's USB port to read RFID keyless entry cards and make your own security systems.

$34.90
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Infrared Phototransistor
Detect Infrared Light with these 5mm IR Phototransistors!

$0.99
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Lipo Low Voltage Battery Alarm
Monitor your 1S - 8S Lipo Battery's charge using this Lipo Low Voltage Battery Alarm. Read the voltage on the display and when the voltage gets too low, the alarm buzzer will sound. Great for robots and quadcopters.

$7.95
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Optical Detector /...
This Optical Detector / Phototransistor has an infrared emitter and NPN Phototransistor all in one package. When the sensor is in front of a reflective surface, the emitted IR beam makes it to the internal phototransistor and closes the circuit.

$0.99
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Line Tracking Module (Arduino...
This Line Tracking Module turns any robot into a Line Tracking Robot. It emits an IR beam and collects the reflected beam. If the object below the sensor is black or white, the voltage is high or low respectively. Arduino Compatible

$5.49
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OV7670 VGA Camera Module for...
Use this camera module to quickly add eyes to your Arduino projects.

$9.99
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Short Flex Sensor 2.2"
When this short 2.2 inch sensor flexes (bends) the resistance changes. Famous for being in the Nintendo Powerglove.

$11.95
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Long Flex Sensor: 4.5"
When this long 4.5 inch sensor flexes (bends) the resistance changes. Famous for being in the Nintendo Powerglove.

$16.90
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Joystick Breakout Module...
This joystick is mounted on an easy to hook up breakout board. Detect movements in all directions via VRx and VRy pins as well as button clicks on the SW pin.

$9.95
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Circular Touch Sensor - Rotary...
Detect touch using this circular soft potentiometer or SoftPot. As your finger moves clockwise or counterclockwise around the sensor, the resistance changes, just like a regular potentiometer! Perfect for scroll wheels, volume changing & more.

$7.95
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Christmas Ornament DIY Soldering Kit Decoration Electronic LED Red Learn to Solder: Solder together your very own light up Christmas Ornament! Add some...
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Running Microbug Kit Solder DIY Robot Bug Light Sensitive: Solder & assemble this Microbug robot and watch it drive towards...
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SMD Star LED Soldering Kit SMT Christmas Decoration Electronic Ornament: Solder together your very own electronic star with 20 SMD LEDs! Slowly...
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