I'm Tomu a tiny ARM microprocessor which fits in your USB port. I have two buttons and two LEDs.
We're available on mailing lists and IRC:
Built out of a 3D printed part + 2 layer "thin" PCB. LCA2018 and Crowd Supply boards are 0.6mm.
Designs and documentation are available in:
The board requirements are very lo-fi:
The important features are:
These make something which is almost hand solder-able fit into the tiny size.
All parts are available from Digikey, and are readily available from other suppliers.
The PCB is thinner than a USB socket, and has exposed contacts on the reverse side, so it needs a case in order to make proper contact with the USB pins, and to not short on the shield of the USB port.
Early prototypes used a business card that had been folded over, however the crowd funding campaign made enough to cut steel and make a case.
Designs are available in the
case/ directory. Cases for earlier board versions tend to require higher tolerance on 3D printers.
The aim was to prove that a device which fits in your USB port could be created by hobbyists in small quantities extremely cheaply.
TOMU comes from the abbreviation "Tim's Open Micro USB".
What ever you want! If you do create something, please send me the info!
The contents of this repository excluding
directory is released under your choice of the following two