Does anyone know what the proper term is for a lazer, or other wave, that sets something off when the beam is broken?
And/or where to get one?
Does anyone know what the proper term is for a lazer, or other wave, that sets something off when the beam is broken?
And/or where to get one?
an infrared emitter and a sensor, you shoot the emitter into the sensor.
Where can I get one?
search google
infrared emitter and a sensor