The purpose of this circuit is to cut off the high voltage when the bias voltage fails. The circuit is from a 1975 documentation and can be adapted for other purposes.
Following the American FCC rules, this 90s Radio Electronics circuit shows how to use a...
Published in Radio Electronics magazine in March 1963, this circuit uses 4 transistors of the...
This simple power or speed control for DC Motors uses a Power MOSFET as driver stage and a 4093 IC as...