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 was obtained from the July 1970 issue of Radio Electronics magazine. Zeners are power...
This circuit allows you to simulate an analog telephone line for the repair and testing of...
This small power amplifier makes use of an output transformer given its design time. In fact, the...