This current switch was found in a Radio Electronics from November 1957. It triggers the current determined by the electromechanical sensor, a polarized relay of the time.
This biestable vox circuit was found in an old documentation. The circuit makes use of components of...
This circuit generates a triangular signal whose frequency is given by the basic components. The...
The LED is optically coupled to the LDR1 sensor to provide negative feedback to the circuit and...