Greetings
I'm using a 12V 6 amp battery charger, with a dimmer on it's input.
! but I'm dividing the output to two tanks and would like more precise control of each tank. What I'm plating is about 4 sq inches, or precisely 3.7627 sq inches, copper and tin.
I'm thinking I need .56 [email protected] 9V for the copper and .38 Amps @ 5V for the Tin

I can match the voltages with a pair of 3Amp adjustable voltage regulator IC's
I'm planning on using a couple of 100Watt rheostats, as the max power of [email protected] amps is only about 75 watts max
I'm not sure of the Ohm values I need, It seems it would scale with the input voltage, but I think If i found the proper ohm value, I would probably not need the regulators.

Im also using/experimenting with/ a 25Amp scr with a 555 control circuit, to pulse the power at 10Khz 50% on time, 50% Off time, 7.5Khz with 60%~On and 5Khz with 80% On, and static on modes for the copper tank.
I believe with the pulse I can safely increase the voltage. as the power is only applied during the pulse on time

But I think I still need rheostats to suck up the extra power?
What Ohm value 100, or 1K etc... ?