How to build a dirt battery?
Have you seen the articles online on building a dirt powered battery? If you put a stick of copper and another made of zinc in the ground and water regularly, you can get a voltage out of them. We purchased a hobby sized unit that powers a digital clock with two small flower pots, and it works, but I am trying to build a bigger one in the garden with copper pipes and stuff, but I don't have zinc rods laying around and don't want to spend a lot on it. Anyone tried this? Anyone know what other metals would work other than zinc? I would love to hear your ideas or experiences. Thanks.