This Star Trek red alert circuit was found in the July 1990 issue of Radio Electronics magazine. The power transistor must be equipped with a heat sink.
This circuit that converts very low currents into voltage was obtained in the 80's used component...
April 2017 - Mouser Electronics already has in stock the new HMC8400, Analog Devices low noise...
This circuit has an interesting application. If a device with the selector switch in the 110 V...