This circuit was found in Ferranti's 1967 documentation. The circuit drives a 40 V relay, but it can be adapted to operate with sensitive lower voltage relays.
This oscillator for frequencies up to a few tens of kilohertz was found in a 1970s documentation. The...
This countdown electromagnetic ring launcher was found in an Electronic Hobbyst Handbook from...
This circuit was found in an old Electronic Design used to apply digital signals to an analog...