How to build a thermoelectric lamp

Step 6 Test the coke can fit in the tin can.

Now you can fit the coke can in place. You can see a little dimple in the middle, this is because the coke can was forced down to give the bolt something to rest on. The coke can might not fit perfectly on the bolt because of the insulation, you might need to wiggle it about a bit! Test the movement to make sure you can adjust the height smoothly.