HardLabs

Mysterium

coseyfannitutti·mysterium

Mysterium PCB layout, top view — open source AVR/Arduino board by coseyfannitutti
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About the Mysterium PCB

Mysterium is an open source AVR/Arduino PCB design by coseyfannitutti, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 347.7 × 146.6 mm, with 206 components from 26 distinct parts.

Its main chip is the ATmega32A-PU, from the AVR/Arduino family. By type, the board carries 95 switches, 89 diodes, 7 resistors, 5 capacitors, 1 IC and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

TKL keyboard that can be entirely assembled using only through hole components, including usb type-c

BOM, Build Guide, and Flashing Information

Optional High Profile Lasercut Acrylic Case

Mysterium, from the project README
From the project README

Main components on the Mysterium

ATmega32A-PU

Mysterium bill of materials (BOM)

206 components, 26 distinct parts.

QtyPartRefs
1
ATmega32A-PU
U1
1
Crystal
Y1
1
AVR-ISP-6
J1
1
BOOT
BOOT1
1
500mA
F1
1
RESET
RESET1
1
6.25U
ST83
1
7U
ST84
76
KEYSW
SW0, SW1, SW2, SW3, SW4, SW5, SW6, SW7 +68
1
KEYSW
SW29
6
KEYSW
SW33, SW46, SW77, SW81, SW86, SW90
1
KEYSW
SW50
8
KEYSW
SW51, SW78, SW79, SW82, SW85, SW87, SW88, SW91
2
KEYSW
SW63, SW64
1
KEYSW
SW75
1
USB_C_GCT_USB4085
USB1
1
POWER
LED1
87
D_Small
D0, D1, D2, D3, D4, D5, D6, D7 +79
2
3.6V
D95, D96
2
22p
C1, C2
Show 6 more
QtyPartRefs
1
4.7u
C3
2
0.1u
C4, C5
2
5.1K
R1, R2
2
75R
R3, R4
2
1.5K
R5, R6
1
10K
R7

Mysterium design files

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

Mysterium: common questions

What microcontroller does the Mysterium use?

The Mysterium is built around the ATmega32A-PU, from the AVR/Arduino family.

How big is the Mysterium PCB?

The Mysterium measures 347.7 × 146.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mysterium?

206 components, from 26 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mysterium design files?

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

Can I use the Mysterium design in my own project?

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

Can I test firmware for the Mysterium 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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