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.
This circuit is intended to trigger a TTL door or flip-flip from a signal coming from an SCR....
This circuit found in a 1988 documentation, uses a piezoelectric or crystal capsule as a...
This circuit, which can be used as a shield, was found in Radio Electronics from the 90s. The...