This TTL circuit found in the September 1996 issue of Electronics Now magazine doubles the frequency of a rectangular signal. The power supply must be 5 V.
This simple electronic toy organ produces an interesting sound, which can be used by the most...
This SCR circuit was found in an American 1980s documentation. The circuit is still current,...
The sensor of this circuit can be any phototransistor and the SCR can be the TIC106. The circuit and...