Useless Machines
The most useless of all machines, it’s sole purpose is to turn itself off again. 
This 110 x 80 x 50mm box fits neatly in the hand and 2x AAA batteries last for months.
This product is available in three different varieties
- "Soldering Required": Solder all the components onto the PCB yourself 
- "No Soldering": Screw the wires into the appropriate terminals 
- "Assembled": A complete working box shipped to you (Batteries not included). 
Instructions for building your kit can be found here
”Soldering Required”        or         “No Soldering” 
There is also a video guide to follow if you prefer
