HardLabs

M8

thebiguno·microcontroller-projects·projects/m8/kicad/m8.kicad_pcb

M8 PCB layout, top view — open source AVR/Arduino board by thebiguno
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About the M8 PCB

M8 is an open source AVR/Arduino PCB design by thebiguno, published on GitHub. It is a 2-layer board measuring 50 × 50 mm, with 154 components from 16 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. Other key parts include the MCP7940N and WS2812. By type, the board carries 74 capacitors, 66 ICs, 8 resistors, 2 crystals, 2 switches and 1 connector.

From the project

A home for a bunch of microcontroller projects which don't warrant their own repos.

microcontroller-projects ========================

A home for my microcontroller projects, including Stubby the Hexapod and others. It includes libraries for avr-gcc along with sample programs on how to use them, some KiCad modules, and the source code for a number of projects.

Some major projects include: Stubby the Hexapod (http://stubby.digitalcave.ca/stubby/) (Now extracted into its own repo at https://github.com/thebiguno/stubby) DrumMaster (http://drummaster.digitalcave.ca/drummaster/) * Chiindii (http://chiindii.digitalcave.ca/chiindii/)

Main components on the M8

ATMEGA32U4-AUMCP7940NWS2812

M8 bill of materials (BOM)

154 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-AU
U1
1
MCP7940N
U2
64
WS2812
U3, U4, U5, U6, U7, U8, U9, U10 +56
1
16 MHz 12pF
X1
1
32.768 kHz 12pF
X2
1
USB_OTG
J1
1
HWB
SW3
1
RST
SW4
1
TVS_BIDIRECTIONAL_2CH
D1
2
12pF
C1, C2
1
1uF
C3
65
0.1uF
C4, C11, C12, C13, C14, C15, C16, C17 +57
6
.1 uF
C5, C6, C7, C8, C9, C10
2
22
R1, R2
2
4k7
R3, R4
4
10k
R5, R6, R7, R8

M8 design files

The KiCad project lives in the thebiguno/microcontroller-projects repository on GitHub; these links point at the commit this page was built from.

M8: common questions

What microcontroller does the M8 use?

The M8 is built around the ATMEGA32U4-AU, from the AVR/Arduino family.

How big is the M8 PCB?

The M8 measures 50 × 50 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the M8?

154 components, from 16 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 M8 design files?

From the thebiguno/microcontroller-projects repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the M8 design in my own project?

The repository has no license, so all rights stay with thebiguno. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the M8 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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