We found this circuit that converts a direct voltage into a proportional frequency signal. The circuit is from an Electronics Now from April 1993. The JFET can be of any type.
In the figure we have a very simple trigger circuit for an SCR that powers a 12 V lamp whose...
With the use of precision resistors and capacitors, this circuit with programmable unijunction transistor...
This 15 W power stage was found in Radio Electronics magazine from August 1959. The transistors are the...