This circuit was found in the September 1997 issue of Electronics Now magazine. The circuit uses two op-amps and includes the symmetrical power supply.
Constant currents from 10 mA to 1 A can supply the load, depending on the selection made by S1. Q1...
In the figure we have two typical configurations of voltage regulators with protection against short...
Found in an old Radio Electronics, this circuit uses current components, used to rectify AC...