5 LED Log Scale with U257B (CB25442E)

The circuit was found in the February 1992 Radio Electronics magazine. The scale can be changed by changing R2 and R3.

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...