This circuit was found in the February 1994 issue of Electronics Now magazine. The circuit uses 6 and 12 V regulators that must be equipped with heat sinks. The current is 1A (max).
This charger for currents up to 100 mA was found in a 1980 publication. The transistor could be...
In the figure we have a high stability voltage reference, providing a voltage of 10 V at the...
This circuit is from old documentation, but can be adapted to use modern components. Power...