A sort of most useless machine (with a cheap dc motor and gearbox), that we use a lot in our workshops at the makerspace and during events to build with people for free :)

Designed by http://www.thingiverse.com/Inouk and tweaked a little for lasercutting.

use 363 x 173 mm of material (3mm thick)

Full BOM here : http://wiki.nybi.cc/index.php/MostUselessMachine

(costing roughly 56€ for 10 machines)

The "doigt-v5" have a flag for cheap microswitch that don't have a metal lever, the version without flag is for more traditional microswitches.