FET Colpitts Oscillator (CB22394E)

This ultra-simple circuit has the frequency determined by the LC network. Any general purpose JFET can be used.

Driver for piezoelectric motor (CB7998E)
Found in an Electronic Design from the 90s, this circuit uses high voltage operationals of the...
Digital Oil Pressure Gauge (CB25336E)
This circuit was found in the July 1990 Radio Electronics magazine. It is based on the 3-digit...
Operational VCO (CB13131E)
The circuit shown in the figure uses two of the four operational amplifiers found on the LM324...