HardLabs

Amethyst

Keyaan-07·Amethyst·hardware/amethyst.kicad_pcb

Amethyst PCB layout, top view — open source RP2040/RP2350 board by Keyaan-07

About the Amethyst PCB

Amethyst is an open source RP2040/RP2350 PCB design by Keyaan-07, published on GitHub. It is a 2-layer board measuring 321.3 × 119 mm, with 196 components from 20 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q128JVS and AMS1117-3.3. By type, the board carries 84 switches, 84 diodes, 17 capacitors, 6 resistors, 3 ICs and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

A 75% keyboard with 84 keys!

Amethyst, from the project README
From the project README

Main components on the Amethyst

RP2040W25Q128JVSAMS1117-3.3

Amethyst bill of materials (BOM)

196 components, 20 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2040
U1
1
W25Q128JVS
U2
1
AMS1117-3.3
U3
1
CRYSTAL_GND24
Crystal_GND24
Y1
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J2
73
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +65
1
SW_Push
SW30
2
SW_Push
SW32, SW45
2
SW_Push
SW47, SW72
2
SW_Push
SW59, SW61
3
SW_Push
SW75, SW76, SW77
1
SW_Push
SW78
84
1N4148W
D1, D2, D3, D4, D5, D6, D7, D8 +76
2
15P
15p
C1, C2
3
1u
C4, C5, C6
2
10U
10u
C13, C22
10
100N
100n
C14, C15, C16, C17, C18, C19, C20, C23 +2
2
5.1K
5.1k
R1, R2
2
1k
R3, R6
2
27
R4, R5

Amethyst design files

The KiCad project lives in the Keyaan-07/Amethyst repository on GitHub; these links point at the commit this page was built from.

Amethyst: common questions

What microcontroller does the Amethyst use?

The Amethyst is built around the RP2040, from the RP2040/RP2350 family.

How big is the Amethyst PCB?

The Amethyst measures 321.3 × 119 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Amethyst?

196 components, from 20 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 Amethyst design files?

From the Keyaan-07/Amethyst 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 Amethyst design in my own project?

The repository has no license, so all rights stay with Keyaan-07. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Amethyst without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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