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Mithril panneled

sanfeps·mithril_kb·Mithril-panneled/Mithril-panneled.kicad_pcb

Mithril panneled PCB layout, top view — open source AVR/Arduino board by sanfeps
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About the Mithril panneled PCB

Mithril panneled is an open source AVR/Arduino PCB design by sanfeps, published on GitHub. It is a 4-layer board measuring 132.8 × 138.8 mm, with 216 components from 32 distinct parts.

Its main chip is the ATMEGA32U4-A, from the AVR/Arduino family. Other key parts include the USB6B1. By type, the board carries 108 diodes, 56 switches, 28 capacitors, 10 resistors, 6 connectors and 4 ICs.

It belongs with the keyboards and displays & leds designs in this gallery.

From the project

mithril keyboard, a split keyboard with 4x6 column ortholinear staggered keys and 3 thumb keys.

A 54-key (27 per side) column-staggered split ergonomic mechanical keyboard with per-key underglow, USB-C on each half, and a dual-MCU design.

- Split — two independent halves connected over TRRS - MCU — ATmega32U4 on each half (true split, dual-MCU) - Layout — 4×5 column-staggered grid + outer pinky column + thumb cluster (27 keys/side) - Switches — MX-compatible, Kailh hotswap sockets (1u plated) - Lighting — SK6812MINI-E reverse-mount per-key underglow - Connectors — USB-C on both halves, TRRS jack for inter-half communication - Case — 3D-printed shell + PCB top plate - Firmware — QMK…

Mithril panneled, from the project README
From the project README

Main components on the Mithril panneled

USB6B1ATMEGA32U4-A

Mithril panneled bill of materials (BOM)

216 components, 32 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
USB6B1
U1, U3
2
ATMEGA32U4-A
ATmega32U4-A
U2, U4
2
16MHZ
16MHz
Y1, Y2
2
AVR-ISP-6
J1, J4
2
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J2, J5
2
AUDIOJACK4
AudioJack4
J3, J6
54
Keyswitch
S1, S2, S3, S4, S5, S6, S7, S8 +46
2
~
SW1, SW3
54
Diode
D1, D2, D3, D4, D5, D6, D7, D8 +46
54
SK6812MINI-E
SK6812MINI
D55, D56, D57, D58, D59, D60, D61, D62 +46
2
FerriteBead
FB1, FB2
2
22P
22p
C1, C2
8
100N
100n
C3, C5, C6, C7, C8, C9, C10, C20
1
1u
C4
1
10U
10u
C11
2
22p
C12, C13
2
100n
C14, C21
1
10NF
1u
C15
1
100NF
100n
C16
1
4.7UF
100n
C17
Show 12 more
QtyPartRefs
2
22P
100n
C18, C19
1
100N
10u
C22
2
100N
10nF
C23, C26
1
100NF
100nF
C24
1
100N
4.7uF
C25
1
100N
100nF
C27
1
10U
4.7uF
C28
3
5K1
5k1
R1, R2, R7
1
10K
10k
R3
4
22
R4, R5, R10, R11
1
10K
5k1
R8
1
10k
R9

Mithril panneled design files

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

Mithril panneled: common questions

What microcontroller does the Mithril panneled use?

The Mithril panneled is built around the ATMEGA32U4-A, from the AVR/Arduino family.

How big is the Mithril panneled PCB?

The Mithril panneled measures 132.8 × 138.8 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Mithril panneled?

216 components, from 32 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 Mithril panneled design files?

From the sanfeps/mithril_kb repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Mithril panneled design in my own project?

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

Can I test firmware for the Mithril panneled 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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