Hi. I have made a 12Vdc 3A unregulated power supply for my projects. I want to do some electrodeposition, and the 12V are a bit too high (It starts to electrolyze water and the deposited copper breaks very easily). I'm looking for a way to step-down the voltage without using too much money (electronic components are expensive where I live). My power supply is a simple Mains -> transformer -> rectifier diodes -> 4 1000 microfarad capacitors in parallel. (As I'm not using anything sensitive on the output, I don't care about the voltage ripple). I'm looking for advice to step-down the voltage to less than 1V without too much power loss. It doesn't have to produce a very precise voltage or be free of rippling. But should not be too inefficient and be able to manage a variable load. Options that I have considered: Adding another transformer to the output of my actual transformer: This option would be pretty nice as it lets me get more current on the low voltage side. However, it's a bit expensive. Using a step-down boost converter: Again, seems pretty nice but somewhat expensive. I ruled out resistor/capacitor/inductor voltage dividers because they have very big losses and I want to be able to change the output load. I'd appreciate any other ideas. Or help selecting between what I said before. Apologies for my bad English, and thanks for your help.