HardLabs

Ai03-macropad

Forge-Media·ai03-macropad-pcb

Ai03-macropad PCB layout, top view — open source AVR/Arduino board by Forge-Media
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About the Ai03-macropad PCB

Ai03-macropad is an open source AVR/Arduino PCB design by Forge-Media, published on GitHub. It is a 2-layer board measuring 67.3 × 88.9 mm, with 73 components from 27 distinct parts.

Its main chip is the ATmega32U4-MU, from the AVR/Arduino family. By type, the board carries 25 diodes, 21 capacitors, 9 resistors, 2 connectors, 2 inductors and 1 IC.

It belongs with the keyboards and wearables designs in this gallery.

From the project

An ai03 inspired macropad pcb design

My attempt at learning and implementing ai03's guide to pcb design for keyboards. The aim of this project is to design and manufacture a simple 3by3 MX style macropad pcb, which actually works. The pcb can then be manufactured and either assembled by hand or by the manufacturer if they provide assembly service.

- 9 1U MX-Hotswap switches - USB-C support - Atmega32u4 support (MU QFN-44 version) - Per-key RGB LED (9 LEDs) - RGB Underglow (4 LEDs) - ESD and Reverse Bias protection (Fused VCC and +5v) - QMK support - VIA support (TBD)

Main components on the Ai03-macropad

ATmega32U4-MU

Ai03-macropad bill of materials (BOM)

73 components, 27 distinct parts.

QtyPartRefs
1
ATmega32U4-MU
U1
1
16Mhz
Y1
1
Conn_01x06
J1
1
ICSP
J2
1
500mA
F1
9
MX-NoLED
MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8 +1
1
SW_Push
SW1
1
HRO-TYPE-C-31-M-12
USB1
9
D_Small
D1, D2, D3, D5, D6, D7, D8, D9 +1
1
D_Schottky_Small
D4
9
SK6812MINI-E
D11, D12, D13, D15, D16, D17, D18, D19 +1
1
PRTR5V0U2X
D14
4
WS2812B-MINI
D21, D22, D23, D24
1
LED
D25
1
50Ω@100Mhz
FB1
1
100Ω@100Mhz
FB2
14
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +6
3
0.1uF
C15, C19, C20
1
1uF
C16
2
22pF
C17, C18
Show 7 more
QtyPartRefs
1
10uF
C21
2
5.1k
R1, R2
1
330
R3
2
10k
R4, R7
2
22
R5, R6
1
300
R8
1
1k
R9

Ai03-macropad design files

The KiCad project lives in the Forge-Media/ai03-macropad-pcb repository on GitHub; these links point at the commit this page was built from.

Ai03-macropad: common questions

What microcontroller does the Ai03-macropad use?

The Ai03-macropad is built around the ATmega32U4-MU, from the AVR/Arduino family.

How big is the Ai03-macropad PCB?

The Ai03-macropad measures 67.3 × 88.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Ai03-macropad?

73 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Ai03-macropad design files?

From the Forge-Media/ai03-macropad-pcb repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Ai03-macropad design in my own project?

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

Can I test firmware for the Ai03-macropad 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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