The universal multicolour torch (flashlight)

Step 4 Preparing the torch

In order to operate the switch, the shaft has to go through the torch head. With a shaft diameter of 6 mm, I used a 6.5 mm drill to create a hole that was placed directly below the screw thread of the head cover.

With the shaft's position thus defined, the circuit would barely fit on top. To fit the switch inside low enough I had to carve away some of the plastic with a dremel.