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 is designed to force a current greater than that of the fuse onto the transistor in...
This circuit was found in a General Electric documentation from 1966, It applies to any triac and...
The circuit shown in figure generates triangular signals in the range of 100 Hz to 500 kHz,...