Smart Charger (CB26305E)

This circuit was found in Radio Electronics magazine from the 90's. The circuit is for small NiCad batteries.

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4-Digit Digital Multimeter (CB24735E)
We found this circuit in the February 1983 issue of Radio Electronics magazine. The 4-digit...
Voltage Controlled Resistor (CB5347E)
We found this circuit in an old American documentation. It is an electronic rheostat with a...
Curve Plotter (CB18787E)
With this circuit it is possible to trace the characteristic curve of a component using an...