Found in a 1967 RCA power manual, this circuit uses an ordinary neon lamp to fire a triac. The circuit is for the 110V network.
This circuit functions as a thermostat triggering a relay when the boil control temperature...
The figure shows how to connect a relay to obtain the latch effect. The circuit is from an...
With this circuit it is possible to use a DC buzzer (not a transducer) as an extension of the...