This 5-range current measurement circuit was found in the September 1989 issue of Radio Electronics magazine. It uses an AC/DC converter.
Found in a 1967 EEE, this circuit oscillates at 20 MHz according to the values of the given...
This three-transistor amplifier uses a JFET at the input to increase the input impedance. The...
This optical counter was found in a 1964 Electronics Design. It makes use of an uncommon...