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.
The circuit presented uses Linear Technology Operationals, having been found in a 1993 manual. The...
This circuit consists of a pre-amplifier for high impedance microphones. The circuit uses a FET...
The circuit we have just described has been mounted in the car of the author of the project for...