This control for 1/15 HP motors with 5,000 rpm for 115 V power grid was suggested by a Motorola circuit manual from 1968. The SCR supports more modern equivalents.
Found in an EDN from the 90s, this circuit makes use of integrated circuits of the time, some of...
Found in Linear Technology documentation from the 90s, this circuit has a 100 V common mode...
This circuit was obtained in a 1979 publication, but it can be assembled with the BD135 instead of the...