This circuit can keep a set of lamps on for up to 1 minute, time given by C2 and R2 that can be changed. The load depends on the relay. The circuit is old, from 1988 documentation, but totally viable today.
Found in a Philips documentation from 1968, this circuit detects the trimpot set input voltage....
In need of a small amplifying stage for an intercom, radio or other type of device powered by...
This is another of the Star Trek red alert circuit that you can find on this site. We took this...