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 simple circuit imitates the sound of a machine gun and, when using a larger capacitor, a...
This is a conventional differentiator configuration with operational amplifier. In principle any...
August 2017 - New DTMOS Super Junction MOSFETS from Toshiba are in stock at Mouser Electronics....