The funny thing is that this corrosion will actually produce some significant power, which can be very easily mistaken to be coming from microbial activity.ДЇor making your own DIY MFC, here are some places you can find non-corrosive materials:Д¬harge-pump chip (for power an LED/electronics): S-882Z24-M5T1G This junction can be sealed with epoxy, but this is very difficult to do in practice, especially if you're using high-surface-area or porous electrodes, which you'll need if you want to produce any significant power. That corrosion often occurs at the junction between the electrode material and the wire. Using these corrosive materials means that you're making a corrosion battery instead of an MFC. We've seen several posts about DIY MFCs in the past, but we've found that these projects include the use of metal meshes, metal brushes, copper wire and other materials that corrode in harsh soil environments. The MudWatt actually started out using off-the-shelf components, but we've managed to get the price down by ordering materials in very large quantities and processing them ourselves. However, weвЂ™ve found that making a true MFC with off-the-shelf components is significantly more expensive than purchasing our components. This is completely possible to do, and weвЂ™ve provided resources for that below. Many people have requested more info for creating their own MFC using off-the-shelf parts. While we are of course excited when people buy our products, weвЂ™re also very excited when we inspire people to pursue their own creation and experimentation. But we decided to do it because the MudWatt is designed to be a DIY MFC kit, after all. Thanks so much to everyone that has commented on our post! When Instructables first invited us to post about the MudWatt, we werenвЂ™t sure if it was the right fit, since it is indeed a product, and we were worried our Instructable would end up sounding like an infomercial. The anode is placed within the mud where the electrogenic microbes can grow, while the cathode is placed on top exposing it to oxygen in the air (see MudWatt diagram below). The MudWatt harnesses this remarkable ability by providing these mud-based microbes with two conductive graphite discs, called an anode and cathode. Among these diverse communities of microbes are particular species that have the unique ability to release electrons outside their bodies as part of their respiration process. Although invisible to the naked eye, these microbes, with bodies one-tenth the thickness of a human hair, live throughout virtually all soil and sediment on the planet. How the MudWatt Works: The MudWatt is a fun and educational science kit that uses the micro-organisms naturally found in soil to generate electricity.

Any container (if you're using a different vessel).

MudWatt Classic, MudWatt Science Fair Pack, or MudWatt Classroom Pack.This Instructable will walk you through making your own microbial fuel cell using any MudWatt Science Kit.

The MudWatt microbial fuel cell (affectionately dubbed the 'Dirt Battery') is a device that uses bacteria to convert the organic matter found in mud into electricity.

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