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Mechanical keyboard v1

Ralle001·mechanical-keyboard-v1

Mechanical keyboard v1 PCB layout, top view — open source AVR/Arduino board by Ralle001

About the Mechanical keyboard v1 PCB

Mechanical keyboard v1 is an open source AVR/Arduino PCB design by Ralle001, published on GitHub. It is a 4-layer board measuring 432 × 130.9 mm, with 456 components from 18 distinct parts.

Its main chip is the ATMEGA32U4-AU, from the AVR/Arduino family. Other key parts include the USBLC6-2SC6 and SK6812MINI. By type, the board carries 125 capacitors, 108 ICs, 107 switches, 106 diodes, 6 resistors and 2 connectors.

It belongs with the keyboards designs in this gallery.

From the project

I left this project because it is very expensive. For me these were the numbers: - PCB for JLCPCB would have cost around 52 USD - Plus all the components (not including the keys) around 170 USD - The keys are not that expensive you can get MX compatible keys from Keychron from 16

I left this project because it is very expensive. For me these were the numbers: - PCB for JLCPCB would have cost around 52 USD - Plus all the components (not including the keys) around 170 USD - The keys are not that expensive you can get MX compatible keys from Keychron from 16 USD or buy the original Cherry MX for 40 USD - Other than these you would need to buy the keycaps which would cost you around 80 USD for a set for a 106 key keyboard - Also you need a case and a plate which are custom made. For the plate I got an offer for 30 USD but with the shipping and tax it would have been 60…

Main components on the Mechanical keyboard v1

ATMEGA32U4-AUUSBLC6-2SC6SK6812MINI

Mechanical keyboard v1 bill of materials (BOM)

456 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-AU
ATmega32U4-AU
U1
1
USBLC6-2SC6
U2
106
SK6812MINI
U3, U4, U5, U6, U7, U8, U9, U10 +98
1
16MHZ
16MHz
Y1
1
AVR-ISP-6
J1
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J2
106
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +98
1
SW_Push
SW999
106
1N4148W
D_Small
D1, D2, D3, D4, D5, D6, D7, D8 +98
1
500M
500m
FB1
1
10UF
10u
C1
113
100NF
100n
C2, C3, C4, C5, C6, C9, C10, C12 +105
2
18PF
18pF
C7, C8
1
1UF
1u
C11
8
22UF
10u
C13, C28, C43, C58, C73, C88, C103, C118
2
10K
10k
R1, R3
2
22R
22
R2, R4
2
5.1K
5k1
R5, R6

Mechanical keyboard v1 design files

The KiCad project lives in the Ralle001/mechanical-keyboard-v1 repository on GitHub; these links point at the commit this page was built from.

Mechanical keyboard v1: common questions

What microcontroller does the Mechanical keyboard v1 use?

The Mechanical keyboard v1 is built around the ATMEGA32U4-AU, from the AVR/Arduino family.

How big is the Mechanical keyboard v1 PCB?

The Mechanical keyboard v1 measures 432 × 130.9 mm, has 4 copper layers and is 1.96 mm thick.

How many components are on the Mechanical keyboard v1?

456 components, from 18 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 Mechanical keyboard v1 design files?

From the Ralle001/mechanical-keyboard-v1 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 Mechanical keyboard v1 design in my own project?

The repository has no license, so all rights stay with Ralle001. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Mechanical keyboard v1 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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