We found this circuit in the September 1985 issue of Radio Electronics magazine. It uses CMOS integrated circuits and is part of a larger integrated circuit test project.
A way to avoid the influence of ambient light, or even the action of external light sources on the...
Found in Popular Electronics from the 1980s, this circuit uses two operational amplifiers from...
With this circuit, found in a 1978 publication, we can measure capacitances from 5 pF to 1 uF. The...