This protection circuit for symmetrical 28 V power sources was found in a 1968 EEE documentation. The circuit can be adapted to use modern equivalent components.
This simple transistor tester circuit was found in the February 1968 issue of Radio Electronics magazine....
A square signal of about 1 kHz is produced by this astable multivibrator. Frequency is determined...
The purpose of this circuit is to limit the noise of an audio signal. Diodes are made of...