ADAFRUIT BEAM SENSOR LEDS
Part No: 2168
Manufacturer: ADAFRUIT INDUSTRIES
Stock No: 1815-SA3
SKU No: 244551
Stock Number: 1815-SA3    $15.95
BOARDS COMPATIBLE WITH ARDUINO 1282
BOARDS COMPATIBLE WITH ARDUINO 1283
BOARDS COMPATIBLE WITH ARDUINO 1284
BOARDS COMPATIBLE WITH ARDUINO 1285

Image is for illustrative purposes only. Please refer to product description.

$15.95 CAD
Stock may not be available at all store locations. Inventory quantites can change without notice.
Burlington2
Cambridge2
Markham2
Mississauga2
Scarborough2
Vaughan3
Warehouse 3
Infrared (IR) break-beam sensors are a simple way to detect motion. They work by having an emitter side that sends out a beam of human-invisible IR light, then a receiver across the way which is sensitive to that same light. When something passes between the two, and its not transparent to IR, then the 'beam is broken' and the receiver will let you know. Compared to PIR sensors, break beams are faster and allow better control of where you want to detect the motion. Compared to Sonar modules, they're less expensive. However, you do need both emitter and receiver on opposite sides of the area you want to monitor. This is the 5mm IR version. It works up to 50cm / 20". You can power it from 3.3V or 5V, but 5V will get you better range and is what we suggest. The receiver is open collector transistor output which means that you do need a pull up resistor if you want to read a digital signal off the signal wire. Most micro controllers have the ability to turn on a built in pull up resistor. If you do not, connect a 10K resistor between the white wire of the receiver and the red wire. If you want to control a relay or LED or whatever, it can sink up to 100mA to ground