1 Minute to 20 Hour Timer (CB25748E)

This wide range timer was found in the July 1994 issue of Electronics Now magazine. The circuit drives a relay and is powered by the relay voltage.

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SCR Trigger Circuit (CB16413E)
In the figure we have a very simple trigger circuit for an SCR that powers a 12 V lamp whose...
Precision Time Control using a PUT (CB12337E)
With the use of precision resistors and capacitors, this circuit with programmable unijunction transistor...
15W Stage (CB23628E)
This 15 W power stage was found in Radio Electronics magazine from August 1959. The transistors are the...