a 5 V from the Arduino and the transmitter. He designed the receiver side with equal care. Conceptually the circuit there is simple, consisting of the ultrasonic receiver, followed by a transistor ...

This infrared repeater system is used to extend ... Special attention should be given to avoid optical reactions between the receiver and transmitter. I love all about electronics, circuit diagrams ...

This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light which is invisible to the human eye. The ...

An IR transmitter/receiver pair are positioned on either side of the fan. When the blade passes in between then, the receiver shuts off a transistor connected to one of the Arduino’s external ...