The transistor in this project found in the July 1994 issue of Electronics Now magazine can be any general-purpose type. The circuit is powered by the relay voltage up to 12 V.
This instrumentation circuit was found in the September 1989 Radio Electronics magazine. The...
This circuit converts a signal from any waveform into a rectangular or square signal of the same...
This circuit is from a 1975 Motorola manual. The FET can be the BF245 and the output voltage...