Scale Expander for 12V Meter (CB21330E)

This circuit was found in a QST from the 1990s. The circuit expands the scale of a 10V instrument to measure 20V.

Gain control with 741 and JFET (CB25572E)
This circuit was found in the April 1993 Electronics Now magazine. With it, it is possible to...
4-Digit Digital Multimeter (CB24735E)
We found this circuit in the February 1983 issue of Radio Electronics magazine. The 4-digit...
Selectable staircase generator (CB9341E)
This circuit was found in Philips documentation from 1967. The circuit uses components of the...