“An IR signal is “seen” by a reverse biased IR diode which produced an electrical signal according to the light intensity. This signal is then amplified trough a transistor and used to power an ordinary LED. This means that the LED will light up when the IR diodes receives some IR light (from a TV remote for instance).”
Hi Can you tell me what purpose the 1K resistor serves?
I used weak 9V ( about 7.3V) battery and ended up yanking the 1K out while using 240 instead of 100 ohm limiter.
I must say I had no luck with the blue emiter as detector from the Circuit city combo package, had to use the detector.
I guess I should have tried it with the detector I already had from 15-20 years ago from Radioshack first.
Now off to hook up that CD laser diode, visible or not, curious what the range will be with that, instead of dome shaped ir emiters.