FatalXP created this nifty “Hard Drive Laser FX” device. Videos after the jump.

… using two hard drives to give horizontal and vertical beams. So rather than an oscilloscope it would give me some funky visuals fx

Video 1 – Read/Write Arms in Action

Video 2 – Projection Result

Parts Needed

Two Hard Drive (Dead Ones!)
1mw Laser Pen
Two Bits of Mirror
Multicore Cable
Other Odd Bits Of wires
Solder
Soldering Iron
Multimeter
AA Battery
And a ton of Hot Glue