Looking for a small (say up to 100mA plus output) PP3 powered power supply. An optional AC input to DC output would be good but not critical.
It should be controllable by a suitable pot.
This is for a teaching aid at IMechE lectures in Corrosion and Cathodic Protection to power an anode to supply current to a cathode in a water bath.
The last ones we had were made for us but the company that did so is no longer operating.
Thanks, Tony