The circuit below is a remote control tester circuit. With the circuit, we can see if any IR remote controls are working. One TK19 receiver eye, one loop buzzer, one led and one 1 Kohm resistor are used.
The circuit works with 5V. The IR LED (infrared led) of any remote control is approached to the receiver’s TK19 receiver eye and any key of the remote control is pressed.
TK19 Receiver Circuit Diagram;
Print Circuit PCB Routes;
Top View of the Circuit;
Working video of the circuit;