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.
The figure shows how to use an LM3914 with a variable range moving point. The circuit has an...
This circuit interfaces audio signals with 50-ohm lines. The source must be symmetrical and the...
The circuit shown in the figure generates a square signal (50% active cycle) when the pressure switch...