Found in old American documentation, this receiver receives modulated infrared signals and converts them into sound. The audio amplifier circuit can be replaced by a modern equivalent.
This alarm oscillator was found in the December 1974 issue of Radio Electronics magazine. The...
We found this small audio amplifier in the November 1999 issue of Electronics Now magazine. The...
This circuit is a continuation of the previous one, serving as a protector against overloads in...