THIS PROJECT HAS BEEN ABANDONED!
The Tomu+ has been abandoned and is not under development.
I'm Tomu+ a improved tiny ARM microprocessor which fits in your USB port. I have two buttons and two LEDs.
- Announcement mailing list - Low traffic list for announcements.
- Discussion mailing list - List for discussing development / new features / etc.
- IRC Channel - irc://irc.freenode.net/#tomu - IRC channel for discussing anything related to the project.
WARNING: This design hasn't been proven yet!
Built out of a 3d printed part + 2 layer "thin" PCB (0.4mm or 0.6mm thick).
The board has;
- 6mil traces
- 6mil clearance
- 0.3mm drill / 0.6mm vias
Uses a Freescale Semiconductor / NXP Kinetis KL27 (MKL27Z256VFM4) (datasheet).
The important features are;
- ~$5.00 USD on Digikey
- QFN32 - 5mm x 5mm package
- Inbuilt 5V to 3V3 regulator.
- Crystal-less USB
These make something which is almost hand solder-able fit into the tiny size.
All parts are ordered from Digikey but could easily be ordered from somewhere else.
- 2 x 0402 - 33 Ohm - Digikey
- 2 x 0402 - ~50 Ohm (Depends on LED choice)
- 1 x 0402 - 10k Ohm
- Capacitors - Digikey Capacitors 0402, >1uF
- 1 x Capacitor ~2.2uF 0402
- 1 x Capacitor ~4.7uF 0402
- 2 x LED 0402
- You choice of two different colors (might require adjustment of R1/R2).
- 5mA LEDs are better choice.
- Get highest millicandela rating you can.
- Digikey Search of LEDs in 0402 package
- Create the device
- Create the 3d print model.
- Write the firmware for the device.
Why did you create this?
The aim was to prove that a device which fits in your USB port could be created by hobbists in small quantities extremely cheaply.
Where does the name Tomu come from?
TOMU comes from the abbreviation "Tim's Open Micro USB".
What can I use this for?
What ever you want! If you do create something, please send me the info!
The contents of this repository excluding "third_party" folder is released under your choice of the following two licences:
the "Creative Commons Attribution-ShareAlike 4.0 International License" (CC BY-SA 4.0) full text of this license is included in the LICENSE file and a copy can also be found at http://creativecommons.org/licenses/by-sa/4.0/
the "TAPR Open Hardware License" full text of this license is included in the LICENSE file and a copy can also be found at http://www.tapr.org/OHL