This circuit uses a lamp driven by the Hertz loop and measures its brightness with ordinary photovoltaic cells. The circuit is from a Radio Electronics from February 1964.
Found in a 1968 Electronic Design, this circuit makes use of an unusual ultrasonic delay line...
This circuit shows how to use a 3-terminal voltage regulator as a low frequency oscillator by...
This circuit has some differences from the conventional types of control in which the delay in the...