Simple IR Signal Detector

This is a very useful circuit diagram.We all know we can't see IR signals with our normal eye.So that when our remote controllers are not working it is difficult to check whether our  remote controller is working or not .So I think this circuit will help you to detect IR signals

Note

# Now we can see IR signals with a digital camera or your mobile cam

# Build this circuit on a PCB

# Don't supply over 9V