USB controlled mini lava lamps

Step 7 Final assembly

Altoids tins make great enclosures. They are good at shielding, but they unfortunately are conductors and will short unprotected circuits. To prevent this, cut cardboard and transparency film to the size of the tin, and to fit between the keyboard circuit board and your perfboard. Insert switch in the back hole in your tin. Insert USB plugs mated to the poor man's USB connector into the keyhole cuts in the side so that the tin holds the plugs into the connector. Cram in perfboard and salvaged keyboard circuit, insulate with the cardboard and transparency film. Try to close the tin (ours barely fit).