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.
We found this mains-powered switch circuit in Electronics Now magazine from July 1994. It could be...
This circuit was obtained from Electronics Now magazine, July 1995. The triac depends on the...
This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals...