Based on the CA3161 and CA3162, this circuit was found in the July 1990 Radio Electronics magazine. The circuit is two digits only.
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...