Found in a 1990s Motorola documentation, this circuit aims to protect a triac that drives an inductive load using a relay-switched snubber.
The integrated circuit used in this application is no longer common. The circuit is from the...
This circuit makes use of a sensitive 5 mA reed-relay to be driven directly by a phototransistor. The...
This circuit for monitoring telegraphy transmissions was found in a 1975 CQ magazine. Transistors may be...