This static switch or triac contactor was obtained from Philips 1969 documentation. The SCR is from the era, but modern equivalents depending on the load can be used.
This circuit is a siren with manual modulation that, instead of exciting a speaker, excites...
This circuit that mimics the sound of the famous Scottish instrument was found in a Popular...
This circuit was found in an American publication from the 1980s. In the original version it...