We found this circuit in the April 1993 Electronics Now magazine. Almost any general-purpose JFET can be used. Power is supplied by a battery (2 x 9V).
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...
September 2016 - It can be obtained from Mouser Electronics a kit for developing wireless remote...
This simple solar powered MW receiver was obtained from a 1974 Popular Electronics. The transistor can...