A infrarossi (IR) Break di Beam Sensors are a simple Way To Detect Motion. they Work by Having AN emettitore 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 passaporto between the two, and its Not Transparent to IR, then the 'Beam is broken' and the Receiver will let you know.
Comp Ared to PIR sensore, breakbeams are Faster and allow Better Control of Where You Want To Detect The Motion. Comp Ared to Sonar Modules, they RE less costose. However, you do Need both emettitore and Receiver on Opposite sides of the area You Want To monitor.
'This is the 5 mm IR Version. IT WORKS Up to 50 cm/. You can Power It from 3.3 V or 5 V, but 5 V 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 microcontrollers Have The Ability to turn on a Built in Pull Up resistenza. If you do not, Connect a 10 K 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 100 ma to ground
Check Out Our IR breakbeam tutorial for How to get Started quickly
We also Carry a 3 mm Version that Works for Slightly shorter distanze.