Found in the Encyclopedia of Electronic Circuits volume 5 from 1995, this circuit uses a transformer. The circuit feeds a transformer that produces 200 V for a xenon lamp.
This circuit is from a Popular Electronics from the 90s. The integrated circuit admits equivalents...
This very interesting project was obtained in a 1980 publication. It consists of a device that is...
This circuit beeps when the sensor is triggered by the opening of the freezer door or other...