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 oscillator takes advantage of the 2000 ohms headphone inductance as the oscillator circuit coil....
This circuit can source up to 1,000 V from a 9 V battery. Output current is very low, some...
January 2017 - Mouser Electronics is introducing new, ultra-thin Vishay Displays OLED modules. The new...