Laser Harp

No strings attached? This harp uses laser beams connected to sensors, each of which stands for a particular musical note

Wire soldering thingamajig

I have to solder a couple of wires, which was a painful task because they would keep moving around. So, I came up with this contraption. What you need: two M4 screws, two crocodile clips, one scrap piece of wood. Read more atĀ www.black-electronics.com