This circuit from March 1984 Radio Electronics is intended to allow the use of an oscilloscope to measure capacitance. The circuit uses common integrated circuits.
This circuit is from a July 1970 Radio Electronics magazine. The sensors are metal probes. The 18 V...
This commercial medium and short-wave radio was manufactured in Japan in the 60s. The circuit has...
General Electric suggests this circuit in an 80's documentation. The circuit makes use of PUTs...