Instructions | Geothermal Energy Harvesting Garden Lights

1

Make a metal anchor for your lamp.

A metal anchor in needed because metal is a great conductor of heat and metal can easy be driven into the ground.
2

Acquire a thermoelectric device .

A thermoelectric device or TEG is a solid state device that converts heat differentials to electrical energy. They can be bought cheaply from eBay or various other online stores.
3

Buy or make your own thermal paste.

Thermal paste is commonly used to bond CPUs to cooling devices in computers. I will try making some home made paste with three parts tooth paste and one part petroleum jelly.
4

Drive the ground radiator into the earth.

I used a hammer to sink the metal radiator into the ground.
5

Assemble the TEG stack.

The project should be assembled: ground radiator, thermal paste, TEG, thermal paste, heat sink.

Geothermal Energy Harvesting Garden Lights