This 100 Hz filter was found in the August 1993 issue of Electronics Now. The components can be modified to operate at other frequencies.
This circuit was found in the April 1993 Electronics Now magazine. With it, it is possible to...
We found this circuit in the October 1996 Electronics Now magazine. The circuit uses LDRs as...
With this circuit, from an American documentation from 1976, it is possible to measure...