Based on the LF256 operational amplifier, this circuit was found in the September 1989 issue of Radio Electronics magazine. The indicator is analog, and the power supply must be symmetrical.
This 1993 circuit is evidently for analog TV in the VHF range. The circuit has good power and...
This power inverter circuit was found in Radio Electronics magazine from December 1959....
In the figure below we have a simple way to do chroming, silvering or another type of...