This is a simple DIY gel box. It does not require any sensors or control electronics.
- Power supply (we use a 0-120V DC regulated power supply)
- Small plastic container
- Larger plastic container (the smaller food container should be able to sit inside)
- 2-4 plastic spacers at least 1/2" tall
- 2 banana jacks and wires
- Platinum wire for positive side (we use 6" of 0.005" diameter wire from eBay)
- Other wire for negative side (we use 6" of 0.013" nickel chromium wire from McMaster)
- Electrical tape
- Waterproof glue
- Gel comb (we used cardboard, tape, and LEGO blocks)
Assembling the Gel Box
- Cut off two opposite ends of the small plastic container. Ideally, you want the final size to be at least 2.5 inches from end to end.
- Use the waterproof glue to mount the plastic spacers to the inside of the larger container, close enough together that the small container can rest on top of them.
- Cut two holes in the top edge of the large container, along one of the longer sides of the container. Mount the banana jacks through these holes.
- Attach the platinum wire to one of the banana jacks and run it along the bottom of the large container.
- Attach the other wire to the other banana jack and run it along the bottom of the large container on the opposite end.
- Use a couple small squares of electrical tape to hold the wires in place. Do not cover the wires in tape; the wires needd to be exposed for the gel box to run properly.