This receiver for a modulated light intercom was found in a 90s Elektor. The audio amplifier can be replaced by an equivalent. The sensor can be any phototransistor.
Found in a 90s Maxim's documentation, this circuit employs three company components and is...
This circuit for a digital module was found in the September 1989 Radio Electronics magazine. The...
The components of this circuit are from the time of its publication in the 1980s. Modern...