This simple continuity tester, whose configuration can be found several times on this site, is powered by only 2 batteries providing the indication on an LED.
This circuit is from the Motorola Linear Databook of 1990. The circuit controls a Triac from a...
This circuit was obtained from Maxim documentation. The circuit has 4.5 and 5.5V thresholds for...
This circuit for high power xenon lamps was found in the November 1974 issue of Radio Electronics...