This circuit provides both frequency and voltage division. The circuit was found in a 1966 documentation. The circuit must be supplied with voltages from 32 to 40 V.
This circuit is temperature stabilized. Modern equivalent transistors can be used, and the power...
This circuit uses an optocoupler to obtain a solid state relay whose power depends on the Triac...
This power step for relay activation was found in the 1964 RCA transistors manual. The circuit is of the...