HardLabs

Celestine

ai03-2725·Celestine·Celestine-PCB/Celestine.kicad_pcb

Celestine PCB layout, top view — open source AVR/Arduino board by ai03-2725
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About the Celestine PCB

Celestine is an open source AVR/Arduino PCB design by ai03-2725, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 343.7 × 116.7 mm, with 199 components from 25 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. Other key parts include the PRTR5V0U2X. By type, the board carries 87 diodes, 7 capacitors, 6 resistors, 2 ICs, 1 crystal and 1 fuse.

From the project

Custom TKL PCB for NMB Hi-Tek 725 (Space Invader) switches

This project aims to revive the use of NMB/Hi-Tek 725 series switches, commonly known as "Space Invaders".

Massive credits go to Engicoder, mcmaxmcmc, and many others for helping me along the way with measurements of existing boards and switches.

Main components on the Celestine

ATMEGA32U4-AUPRTR5V0U2X

Celestine bill of materials (BOM)

199 components, 25 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-AU
ATmega32U4-AU
U1
1
PRTR5V0U2X
U2
1
16MHZ
16Mhz
Y1
1
500MA
500mA
F1
75
MX-1U
K_#1, K_#2, K_#3, K_#4, K_#5, K_#6, K_#7, K_#8 +67
8
MX-1.5U
K_ALT1, K_ALT2, K_CTRL2, K_RALT1, K_RALT2, K_RCTRL2, K_TAB1, K_\1
1
MX-2U
K_BACK1
1
MX-1.75U
K_CAPS1
2
MX-2U
K_CTRL1, K_RCTRL1
2
MX-2.25U
K_ENTER1, K_SHIFT1
1
MX-BAE
K_ENTER2
1
MX-2.75U
K_RSHIFT1
1
MX-1U
K_SBACK2
1
MX-7U
K_SPACE1
1
SW_Push
SW1
1
HRO-TYPE-C-31-M-12
USB1
87
SOD-123
D1, D2, D3, D4, D5, D6, D7, D8 +79
1
10UF
10uF
C2
3
0.1UF
0.1uF
C3, C4, C5
1
1UF
1uF
C6
Show 5 more
QtyPartRefs
2
22PF
22pF
C7, C8
2
22
R67, R68
1
10K
10k
R70
1
1k
R71
2
5.1K
5.1k
R73, R74

Celestine design files

The KiCad project lives in the ai03-2725/Celestine repository on GitHub; these links point at the commit this page was built from.

Celestine: common questions

What microcontroller does the Celestine use?

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

How big is the Celestine PCB?

The Celestine measures 343.7 × 116.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Celestine?

199 components, from 25 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Celestine design files?

From the ai03-2725/Celestine repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Celestine design in my own project?

Yes, under the terms of its AGPL-3.0 license, which ai03-2725 chose for the repository.

Can I test firmware for the Celestine 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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