This circuit makes use of a specific 80's component and was found in an American manual of the time. A matrix keyboard allows you to select one of several music programs.
This circuit was found in a Linear Technology manual from the 1990s. The circuit makes use of the...
In this oscillator a phase shift network formed by C1, C2, C3 and R1, R3, R4 determine the fase...
This circuit is suggested by RCA and is based on a dedicated integrated circuit that is the...