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.
This circuit uses components that are still common despite being from 1995 documentation. The circuit can...
Found in an old American documentation, this circuit uses neon lamps as a reference to obtain a...
This pulse width-tuned circuit was found in the March 1996 issue of Electronics Now magazine. The...