2 layers100 × 100 mm
Combo laser driver
adeboni/laser-projector
This project is for a quadruple laser projection controller, aimed at supporting room-scale projections
169 partsGPL-3.0
2 layers321.3 × 119 mm
Amethyst
Keyaan-07/AmethystA 75% keyboard with 84 keys!
- Size
- 321.3 × 119 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 204
- Nets
- 139
- Pads
- 754
- Tracks, vias
- 835, 67
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 29 Apr 2026
- Updated
- 4 Sep 2026
Overview
Amethyst is an open-source printed circuit board by Keyaan-07, from the Keyaan-07/Amethyst repository on GitHub. It is a 2-layer board of 321.3 × 119 mm with 204 parts on 139 nets, routed with 835 tracks and 67 vias.
It is built around the RP2040, W25Q128JVSIQ and AMS1117-3.3, with the 1N4148W among its other parts. Its parts include 84 diodes, 84 switches, 17 capacitors, 6 resistors and 3 ICs. It belongs with the RP2040 boards of this library.
Main components
4
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
README
README.mdAmethyst
Amethyst is an 84-key keyboard with a small form factor. It comes with the RP2040 and i have used purple akko v3 switches to give it purple colour. This keyboard runs qmk firmware and can be found under firmware. The complete design file is amethyst.step.
Soldering and setup
- Order the PCB from the gerbers present in hardware/production.
- order the parts from the given links in bom.csv file
- first solder the smd components on the back side and then proceed to the through hole keys.
- press the heated inserts in the case with the help of a soldering iron.
- screw in the case.
- fit the keycaps on the top.
- short the BOOT and GND pads with a screwdriver and plug in the usb cable.
- go to the firmware folder and download the .uf2 file.
- drag and drop the .uf2 file to the "RPI-RP2" drive that just popped up.
- Your keyboard is now ready!!
Why I made this keyboard
I am getting a new laptop this year and did not want to let go of the keymap of the old keyboard, thus I created amethyst.
BOM
| Designator | Function | Value | Footprint | Quantity | Price | Amount | Order | Link |
|---|---|---|---|---|---|---|---|---|
| PCB | Main PCB | 119x312 | 5 | 8.934 | 44.67 | Yes | https://robu.in/product/online-pcb-manufacturing-service/ | |
| Keycaps | Purple keycaps | 1 | 11.48 | 11.48 | Yes | https://curiositycaps.in/products/macarons-cherry-pbt-keycaps?_pos=368&_fid=c796727f4&_ss=c | ||
| Keys | Akko v3 lavender(pack of 45) | 2 | 11.48 | 22.96 | Yes | https://stackskb.com/store/akko-v3-lavender-purple-pro-switch-pack-of-45/ | ||
| Stabilizers | Clear | 1 | 11.67 | 11.67 | Yes | https://stackskb.com/store/durock-clear-screw-in-stabilizers-v2/?attribute_combination=4%2B1+Set&attribute_spacebar-size=6.25U | ||
| Case | print legion | 1 | 0 | 0 | Yes | https://printlegion.hackclub.com/ | ||
| C1, C2 | Capacitor | 15p | 402 | 2 | 0.017 | 0.034 | Yes | https://robu.in/product/gjm1555c1h150gb01d-murata-electronics-50v-15pf-null-%c2%b12-0402-multilayer-ceramic-capacitors-mlcc-smd-smt-rohs/ |
| C13, C22 | Capacitor | 10u | 805 | 2 | 0.05 | 0.1 | No | https://www.lcsc.com/product-detail/C2932476.html |
| C14, C15, C16, C17, C18, C19, C20, C23, C24, C25 | Capacitor | 100n | 402 | 10 | 0.0074 | 0.074 | No | https://www.lcsc.com/product-detail/C426067.html |
| C4, C5, C6 | Capacitor | 1u | 402 | 3 | 0.02 | 0.06 | No | https://www.lcsc.com/product-detail/C1518208.html |
| D1, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D2, D20, D21, D22, D23, D24, D25, D26, D27, D28, D29, D3, D30, D31, D32, D33, D34, D35, D36, D37, D38, D39, D4, D40, D41, D42, D43, D44, D45, D46, D47, D48, D49, D5, D50, D51, D52, D53, D54, D55, D56, D57, D58, D59, D6, D60, D61, D62, D63, D64, D65, D66, D67, D68, D69, D7, D70, D71, D72, D73, D74, D75, D76, D77, D78, D79, D8, D80, D81, D82, D83, D84, D9 | Diodes | 1N4148W | D_SOD-123 | 90 | 0.0073 | 0.657 | Yes | https://robu.in/product/1n4148w-sod-123-1206-diodereel-of-3000/ |
| J2 | USB-C | USB_C_Receptacle_USB2.0_16P | USB_C_Receptacle_XKB_U262-16XN-4BVC11 | 1 | 0.06 | 0.06 | No | https://www.lcsc.com/product-detail/C393939.html |
| R1, R2 | Resistors | 5.1k | 402 | 2 | 0.005 | 0.01 | No | https://www.lcsc.com/product-detail/C278598.html |
| R3, R6 | Resistors | 1k | 402 | 2 | 0.02 | 0.04 | No | https://www.lcsc.com/product-detail/C427241.html |
| R4, R5 | Resistors | 27 | 402 | 2 | 0.0039 | 0.0078 | No | https://www.lcsc.com/product-detail/C278580.html |
| U1 | MCU | RP2040 | QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | 2 | 0.89 | 1.78 | Yes | https://robu.in/product/raspberry-pi-rp2040/ |
| U2 | Flash | W25Q128JVS | SOIC-8_5.3x5.3mm_P1.27mm | 1 | 1.1 | 1.1 | No | https://www.lcsc.com/product-detail/C2613930.html |
| U3 | Regulator | AMS1117-3.3 | SOT-89-3 | 1 | 0.1 | 0.1 | No | https://www.lcsc.com/product-detail/C917152.html |
| Y1 | Crystal Oscillator | Crystal_GND24 | Crystal_SMD_3225-4Pin_3.2x2.5mm | 1 | 0.38 | 0.38 | No | https://www.lcsc.com/product-detail/C20625731.html |
| Shipping | 0.51 | |||||||
| Total | 100.693 |
3d Files link
All the 3d files can be found on onshape here
Parts
204| Qty | Value | Footprint | References |
|---|---|---|---|
| 84 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +68 |
| 73 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +57 |
| 10 | 100n | Capacitor_SMD:C_0402_1005Metric | C14, C15, C16, C17, C18, C19, C20, C23, C24, C25 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 1u | Capacitor_SMD:C_0402_1005Metric | C4, C5, C6 |
| 3 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.25u_PCB | SW75, SW76, SW77 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C13, C22 |
| 2 | 15p | Capacitor_SMD:C_0402_1005Metric | C1, C2 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R3, R6 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | LOGO | LOGO | G***, G*** |
| 2 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.75u_PCB | SW47, SW72 |
| 2 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.50u_PCB | SW32, SW45 |
| 2 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_2.25u_PCB | SW59, SW61 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1, TP2 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-89-3 | U3 |
| 1 | Crystal_GND24 | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_6.25u_PCB | SW78 |
| 1 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_2.00u_PCB | SW30 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_XKB_U262-16XN-4BVC11 | J2 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U2 |
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Questions
How big is the Amethyst PCB?
It measures 321.3 × 119 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Amethyst use?
204 parts, built around the RP2040, W25Q128JVSIQ, AMS1117-3.3 and 1N4148W. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Amethyst KiCad files?
From the Keyaan-07/Amethyst repository on GitHub, at the commit this page was made from: the board is hardware/amethyst.kicad_pcb and its schematic hardware/amethyst.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Amethyst design in my own project?
Its repository states no licence, so its author keeps all rights: ask Keyaan-07 before reusing the design.