HardLabs

Arduino Micro

sabogalc·KiCad-Arduino-Boards·KiCad Projects/Arduino Micro/Arduino Micro.kicad_pcb

Arduino Micro PCB layout, top view — open source AVR/Arduino board by sabogalc

About the Arduino Micro PCB

Arduino Micro is an open source AVR/Arduino PCB design by sabogalc, published on GitHub under the WTFPL license. It is a 4-layer board measuring 48.3 × 17.8 mm, with 44 components from 24 distinct parts.

Its main chip is the ATMEGA32U4-XUMU, from the AVR/Arduino family. Other key parts include the NCP1117-5.0_SOT223 and LP2985-3.3. By type, the board carries 13 capacitors, 11 resistors, 5 diodes, 4 connectors, 3 ICs and 2 transistors.

From the project

A collection of Arduino boards recreated from scratch in KiCad. Legacy USB connectors have been replaced with USB-C where applicable.

This board is not much bigger than the Nano, but it brings benefits such as the full-sized reset switch and four more IO pins.

Arduino Micro, from the project README
From the project README

Main components on the Arduino Micro

ATMEGA32U4-XUMUNCP1117-5.0_SOT223LP2985-3.3

Arduino Micro bill of materials (BOM)

44 components, 24 distinct parts.

QtyPartRefs
1
ATMEGA32U4-XUMU
U1
1
NCP1117-5.0_SOT223
U2
1
LP2985-3.3
U4
2
FDN340P
Q1, Q2
1
ECS-160-18-33-JGN-TR
Y3
1
USB_C_Receptacle_USB2.0_16P
J3
1
M20-9980345
J4
2
PH1-17-UA
J5, J6
1
MF-MSMF050-2
F1
2
CG0603MLC-05E
RV1, RV2
1
TS06-667-30-BK-100-G-SMT-TR
S1
2
YELLOW
D1, D4
1
CD1206-S01575
D2
1
GREEN
D3
1
BLUE
D5
1
MH2029-300Y
FB2
6
100n
C1, C2, C6, C9, C10, C11
2
22u
C3, C14
3
1u
C4, C5, C7
2
22p
C12, C13
Show 4 more
QtyPartRefs
4
10k
R1, R2, R4, R9
2
5.1k
R3, R10
4
1k
R5, R6, R7, R8
1
22R
RN1

Arduino Micro design files

The KiCad project lives in the sabogalc/KiCad-Arduino-Boards repository on GitHub; these links point at the commit this page was built from.

Arduino Micro: common questions

What microcontroller does the Arduino Micro use?

The Arduino Micro is built around the ATMEGA32U4-XUMU, from the AVR/Arduino family.

How big is the Arduino Micro PCB?

The Arduino Micro measures 48.3 × 17.8 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Arduino Micro?

44 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Arduino Micro design files?

From the sabogalc/KiCad-Arduino-Boards repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Arduino Micro design in my own project?

Yes, under the terms of its WTFPL license, which sabogalc chose for the repository.

Can I test firmware for the Arduino Micro 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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