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.
The circuit shown is from the Motorola Linear Databook from 1990. The circuit has two outputs with...
This rejector filter that was found in a 1980 documentation uses an operational one at the time....
This fuse test circuit was found in Radio Electronics magazine from August 1958. The circuit was...