Hey folks, I have a set of infrared beam devices, where one sends a beam to another which is the receiver. The receiver has an inbuilt relay. I want to to be able to get the arduino to do something when the beam is broken. I have tried pushing a digital high signal into the relay and listening fo…

Infrared Beam Relay

Pelleplutt April 28, 2014, 9:17am 2

Do you have an pullup or pulldown resistor on the input?

Pelle