This circuit, with a 12 V input, was found in a Popular Electronics from the 1990s. Information is given about the ferrite-wrapped transformer. The transistor must be mounted on a heatsink.
The circuit presented is from a 1972 RCA technical documentation. The integrated circuit consists of a...
This circuit is from a 1967 publication. The configuration holds true for modern transistors having...
This proximity relay circuit was found in the July 1990 Radio Electronics magazine. The supply...