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 very interesting project was obtained in a 1980 publication. It consists of a device that is...
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...
This circuit for a frequency of 10 kHz was found in an Electronic Design. It makes use of a tunnel...