anyone tell me how a simple IR detector and a IR sensitive transistor work?? will they form the same frequency pulses that they received?
Will the IR modulator filter the input ir signal which is at its center freq?
as I would like to set a carrier freeq (40kHz) and a modulation freq(250Hz) for the ir signals in the tx part by using 555~ if the ir modulator can filter the signal wihich is at its center freq(40kHz), then i can only do the demodulation of the modulation freq(250Hz)! is it right?? :wink: