Simple homemade tilt activated switch

imagitronics writes –

I started working on my next project tonight and realized that I needed four tilt activated switches. I wasn’t exactly sure what would make a good tilt switch. The majority of online videos and tutorials for tilt switches were either undocumented, mercury based, or actually accelerometers. Luckily I found these small steel hooyahs. I have no idea what they were actually designed for, but they make pretty handy little switches.

Simple homemade tilt activated switch – Link.