This circuit triggers an alarm in the event of a power failure. The circuit is from an 80's documentation, being powered by 9 V battery. The parts are common today.
This circuit was found in a 1980s documentation. Modern general purpose transistors can be used....
July 2017 - Kemer's new supercapacitors are available for dispatch at Mouser Electronics in a...
This simple capacitor tester can be used for electrolytes from 1 uF. In one position of S1 the...