HardLabs

Main board

cester-ino·Midi_project·main_board/main_board.kicad_pcb

Main board layout, top view — open source AVR/Arduino board by cester-ino

About the Main board

Main board is an open source AVR/Arduino PCB design by cester-ino, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 95 × 43 mm, with 24 components from 10 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. By type, the board carries 6 capacitors, 5 resistors, 1 IC, 1 crystal and 1 connector.

It belongs with the audio designs in this gallery.

From the project

by Unknown Devices

If you want to stay up-to-date with the project check out our Instagram

Arduino based modular midi system - Compatible with the Arduino Pro Micro (sparkfun pro micro) - Up to 192 control devices (up to 129 analog devices) - Midi configurator software - Integration with Ableton using custom scripts - Cheap - Hackable!

Main board, from the project README
From the project README

Main components on the Main board

ATMEGA32U4-AU

Main board bill of materials (BOM)

24 components, 10 distinct parts.

QtyPartRefs
1
ATMEGA32U4-AU
U1
1
16mhz
Y1
1
USB
J1
1
AUX_CONN
AUX1
1
MIDI_OUT
MIDI1
8
Conn_01x08
MUX1, MUX2, MUX3, MUX4, MUX5, MUX6, MUX7, MUX8
3
0.1uF
C1, C2, C5
3
22pf
C3, C4, C6
4
220
R1, R2, R3, R4
1
10K
R5

Main board design files

The KiCad project lives in the cester-ino/Midi_project repository on GitHub; these links point at the commit this page was built from.

Main board: common questions

What microcontroller does the Main board use?

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

How big is the Main board?

The Main board measures 95 × 43 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Main board?

24 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the Main board design files?

From the cester-ino/Midi_project repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Main board design in my own project?

Yes, under the terms of its GPL-3.0 license, which cester-ino chose for the repository.

Can I test firmware for the Main board 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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