How to build a thermoelectric lamp

Step 9 Cut the peltier holder to size.

Next you can make the cover for the peltier. It's easier to cut the square out with this part still attached to the can - cut the square and then use a can opener to remove the bottom. Mark around the peltier with a marker or a scribe and drill a hole in the centre, work out from this using the tin snips to make the square. The square needs to be slightly smaller than the peltier chip so that it grips it. Mark the two holes the same as on the heatsink and drill them for the correct size. I made the cut out slightly round so I didn't cut through the strengthening ribs on the tin lid.