18″x 6″x 4″
Wood, LEDs, Mercury Switch
This is the first LightHammer, created in the summer of 2011. The handle is constructed from several sheets of plywood, and the head is a length of 4×4 lumber. Each LED is wired in parallel to a single mercury switch located in the handle. While crude in comparison to later designs, the Mk1 has proven incredibly robust and has yet to break after four years of use.