This circuit produces sounds of 6 different notes depending on the keys activated. The circuit is from a Radio Electronics from May 1965. The transistor must be equipped with a heat radiator.
We found this circuit in an English publication in 1976. The circuit is based on the use of a...
The original purpose of this 1963’ circuit from a magazine is to replace the mechanical vibrators used...
This 80's documentation circuit includes an amplifier of the era. Used integrated circuits are...