This circuit is from a Radio Electronics from October 1963. The transistor is a power transistor of the time, and two transformers are used. The input has 10k impedance and is powered by 12 V.
With this circuit it is possible to monitor the charge and discharge of a battery. The circuit is...
This high pass filter was found in the February 1996 Electronics Now magazine. The circuit...
This automatic nickel-cadmium or NiCad battery charger was found in European documentation from...