Without regulation, this basic circuit has the output current, and voltage determined by the transformer. The input can be 110 V and 220 V if the transformer used is of the indicated type.
This circuit was found in the May 1989 issue of Radio Electronics magazine. The components can be...
Using the 741 this basic circuit was found in the November 1973 Radio Electronics magazine. The...
This circuit came out in an English magazine from 1977, but it can be easily assembled today, as...