This sequential beacon was found in an 80's Radio Electronics. The circuit can be designed using modern equivalent components. Triacs shall be fitted with heat sinks.
This timer was found in a 1994 Electronics Now. The relay must be a sensitive type. If it has a...
We can make an oscillating relay producing a rectangular signal taking advantage of the inductance of...
This circuit appears at various points in this section and on this site, with minor variations. It uses the...