This circuit was proposed by an old American documentation for listening to SSB stations. The circuit makes use of a small old radio 455 kHz IF transformer.
Here we show a simple way to use the 4088 or 4018 as a latched switch. The output can drive...
This circuit uses an optical door opening sensor sensing the action of ceiling light or another...
This article is from an old publication from 1978. The transistor can be a BC548 and the power...