This circuit is from the 80's but uses common components today. The relay is voltage sensitive according to the power supply used. Transistors may be general purpose types.
With this circuit it is possible to visualize the characteristic curve of a component on an...
August 2017 - The new DPS1133 power switches from Diodes Incorporated for currents up to 3.3 A...
Virtually any FET can be used on this voltmeter found in old documentation. The indicator is a...