This TV remote control receiver uses a ratchet system to activate an old drum-type selector to change channels. A common system at the time. The circuit is from a Radio Electronics from February 1961.
This simple guitar distortion effect was found in a documentation from the 90's. The circuit is...
Found in a Popular Electronics from the 90s, this game can be seen in other configurations on this site. The...
This crystal fundamental frequency oscillator can operate at frequencies up to a few tens of...