Just posted a link, really simple but I have a adjustable power supply I use. You can pretty much buy the ingredients at the supermarket for the solution, just need Zinc, I just buy ingots and drill a hole in them they last a long time. And you can use like a cell phone charger .3 amps per square inch. so a 500 MA supply is fine unless you do a lot of stuff at once. You want that one done no sweat send it to me I do it every few days, just pay the rides.