Tomu hardware
About the Tomu hardware PCB
Tomu hardware is an open source Silicon Labs PCB design by im-tomu, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 13 × 9.4 mm, with 11 components from 8 distinct parts.
Its main chip is the EFM32HG309F64G-B-QFN24, from the Silicon Labs family. By type, the board carries 4 resistors, 3 capacitors, 2 diodes and 1 IC.
From the project
A tiny ARM microprocessor which fits in your USB port.
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:
IRC Channel - irc://irc.freenode.net/#tomu - IRC channel for discussing anything related to the project. Announcement mailing list - Low traffic list for announcements. * Discussion mailing list - List for discussing development / new features / etc.
Main components on the Tomu hardware
Tomu hardware bill of materials (BOM)
11 components, 8 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | EFM32HG309F64G-B-QFN24 EFM32HG309 Silicon Laboratories Inc | QFN-24-1EP_5x5mm_Pitch0.65mm | U1 |
| 1 | 3V_PAD | pads-1x1 | 3.3V |
| 1 | LED Green 0402 ANY | LED_0402 | D1 |
| 1 | LED, Red, 0402 ANY | LED_0402 | D2 |
| 2 | 1uF, 10V, X5R, 0402 ANY | C_0402 | C1, C2 |
| 1 | 4.7uF, 6.3V, X5R, 0402 ANY | C_0402 | C3 |
| 2 | 100 Ohm, 1%, 1/16W, 0402 ANY | R_0402 | R1, R2 |
| 2 | 15 Ohm, 1%, 1/16W, 0402 ANY | R_0402 | R3, R4 |
Tomu hardware design files
The KiCad project lives in the im-tomu/tomu-hardware repository on GitHub; these links point at the commit this page was built from.
Tomu hardware: common questions
What microcontroller does the Tomu hardware use?
The Tomu hardware is built around the EFM32HG309F64G-B-QFN24, from the Silicon Labs family.
How big is the Tomu hardware PCB?
The Tomu hardware measures 13 × 9.4 mm, has 2 copper layers and is 0.6 mm thick.
How many components are on the Tomu hardware?
11 components, from 8 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Tomu hardware design files?
From the im-tomu/tomu-hardware repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Tomu hardware design in my own project?
Yes, under the terms of its CC-BY-SA-4.0 license, which im-tomu chose for the repository.
Can I test firmware for the Tomu hardware without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Silicon Labs firmware against it before you order a PCB.
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