This little gizmo was the most frustrating thing I’ve built so far. It was missing a part (the red LED, not a biggie) and the diagram (the only instructions it came with) was wrong, leaving out a couple of major components. It took four altoids tins to get one drilled reasonably right.
But, in the end the little bugger (about$15 on ebay, as I recall) sounds pretty damn good.
