HardLabs

Micro-ATX

sparkfun·StupidArduinos·Pro Micro-ATX/Micro-ATX.kicad_pcb

Micro-ATX PCB layout, top view — open source AVR/Arduino board by sparkfun

About the Micro-ATX PCB

Micro-ATX is an open source AVR/Arduino PCB design by sparkfun, published on GitHub. It is a 2-layer board measuring 243.8 × 243.8 mm, with 20 components from 9 distinct parts.

Its main chip is the ATMEGA32U4TQFP-44, from the AVR/Arduino family. Other key parts include the EEPROM-I2CEIAJ. By type, the board carries 8 ICs, 5 capacitors, 5 resistors, 1 module and 1 crystal.

From the project

A bunch of stupid Arduinos

1) Convenient and well-supported Micro-ATX form factor

The Micro-ATX form factor is compatible not only with Micro-ATX PC cases but also Standard- and Extended-ATX cases. The Pro Micro-ATX conforms to the mechanical specs for footprint size, stand-off placement and expansion card position for the widest possible compatibility across case manufacturers.

2) Support for enthusiast-grade cooling hardware

Micro-ATX, from the project README
From the project README

Main components on the Micro-ATX

EEPROM-I2CEIAJ

Micro-ATX bill of materials (BOM)

20 components, 9 distinct parts.

QtyPartRefs
8
EEPROM-I2CEIAJ
U1, U2, U3, U4, U5, U6, U7, U8
1
ATMEGA32U4TQFP-44
M1
1
CRYSTAL-16MHZSMD-5X3.2
Y1
2
1.0UF-0603-16V-10%
C6, C7
1
0.1UF-0603-100V-10%
C8
2
22PF-0603-50V-5%
C9, C10
2
22OHM
R1, R2
1
10KOHM-0603-1_10W-1%
R3
2
4.7KOHM
R4, R5

Micro-ATX design files

The KiCad project lives in the sparkfun/StupidArduinos repository on GitHub; these links point at the commit this page was built from.

Micro-ATX: common questions

What microcontroller does the Micro-ATX use?

The Micro-ATX is built around the ATMEGA32U4TQFP-44, from the AVR/Arduino family.

How big is the Micro-ATX PCB?

The Micro-ATX measures 243.8 × 243.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Micro-ATX?

20 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the Micro-ATX design files?

From the sparkfun/StupidArduinos repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Micro-ATX design in my own project?

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

Can I test firmware for the Micro-ATX 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.

Similar boards