4 layers560.1 × 158.8 mm
Keyboard
DEV-ajthedj/Keyboard
A custom RGB keyboard that features three 1D capacitive touch sliders, two joysticks, an OLED screen, a fingerprint sensor, and plenty of macro keys!
439 parts
2 layers319 × 142.5 mm
Ghoost Board
Broccoliux/Broccoli-board3A fully custom 100% mechanical keyboard with a custom black PCB, hot-swap clicky switches, and full RGB where every internal component is hand soldered and nothing is by assemble.
- Size
- 319 × 142.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 368
- Nets
- 219
- Pads
- 1,412
- Tracks, vias
- 4,876, 832
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 Apr 2026
- Updated
- 26 Oct 2026
Overview
Ghoost Board is an open-source printed circuit board by Broccoliux, from the Broccoliux/Broccoli-board repository on GitHub. It is a 2-layer board of 319 × 142.5 mm with 368 parts on 219 nets, routed with 4,876 tracks and 832 vias.
It is built around the 74AHCT125D, MCP73831 and 1N4148W, with the SK6812MINI-E and USBLC6-2SC6 among its other parts. Its parts include 168 diodes, 90 capacitors, 84 switches, 4 ICs and 3 resistors. It belongs with the keyboards and input and lEDs and displays boards and the nRF52 and nRF5x boards of this library.
Main components
5
74AHCT125D
SOP-14-40℃~+125℃ 1 4 4.3ns@5V,50pF 4.5V~5.5V 40uA 74AHCT 8mA 8mA Schmitt trigger Tri-State Unidirectional SOP-14 Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffer/Driver/Transceiver
MCP73831
UncategorisedMicrochip Technology
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
README
README.mdBroccoli Board
A fully wireless 75% mechanical keyboard built from scratch custom PCB, per-key RGB, BLE 5.0, hot-swap switches, and a 3D printed case. Every component chosen, every trace routed by hand.
What is it?
Broccoli Board is a custom 84-key 75% keyboard I designed completely from scratch. The PCB is designed in KiCad, the case in Fusion 360, and the firmware runs on ZMK. It's fully wireless over BLE 5.0 via the nice!nano V2, has per-key RGB LEDs reverse-mounted on the back of the PCB, and uses Kailh hot-swap sockets so I can swap switches without touching a soldering iron.
Why i built it?
I didn't want to spend $200+ on a keyboard that still isn't fully mine. So I built one my own that belong to me.
Zine
Gallery
CAD & Assembly
 |  |
PCB
 |  |
PCB Soldered
Features
- 84 keys, 75% layout
- Wireless BLE 5.0 via nice!nano V2 (nRF52840)
- Per-key SK6812 Mini-E RGB reverse mount on B.Cu
- Kailh hot-swap sockets no soldering to swap switches
- Rotary encoder with push switch (EC11)
- USB-C wired + wireless dual mode
- 3.7V LiPo 2000mAh with MCP73831 charger IC
- 74AHCT125 level shifter for LED data
- USBLC6-2SC6 ESD protection on USB lines
- ZMK firmware
- 2-layer PCB, KiCad 10, JLCPCB fabrication
- Custom 3D printed case tray, plate, and bezel
Hardware Specs
| Component | Details |
|---|---|
| MCU | nice!nano V2 (nRF52840), socketed |
| Layout | 75%, 84 keys |
| Switches | Gateron Blue × 84, 5-pin PCB mount |
| Hotswap | Kailh CPG151101S11 × 84 |
| LEDs | SK6812 Mini-E × 84, reverse mount |
| Encoder | EC11 rotary encoder with push switch |
| Wireless | Bluetooth 5.0 BLE |
| Firmware | ZMK |
| Battery | 3.7V LiPo 2000mAh (804050), JST PH2 |
| Charger IC | MCP73831, 500mA |
| Regulator | ME6211 3.3V LDO |
| Level shifter | 74AHCT125 |
| ESD protection | USBLC6-2SC6 |
| USB connector | GCT USB4105, 16-pin USB-C |
| PCB | 2-layer, JLCPCB, KiCad 10 |
| Case | SLA resin 3D print, Fusion 360 |
| Matrix | 9 rows × 10 columns, col2row |
How to Build
Order the PCB
- Go to JLCPCB
- Upload
pcb/gerbers.zip - 2-layer, FR-4, 1.6mm, HASL or ENIG
- Minimum order 5 boards
Flash the Firmware
- Fork the ZMK firmware repo
- Edit keymap at
boards/shields/broccoli_board/broccoli_board.keymap - Push GitHub Actions builds automatically
- Download
.uf2from Actions artifacts - Double-tap reset on nice!nano to enter bootloader
- Drag
.uf2onto the USB drive that appears
note: The frimware isn't completely, i will complete it once this gets approved.
Assembly Notes
- Solder LEDs on B.Cu reverse mount facing down
- Solder hotswap sockets on F.Cu
- Solder the nice!nano v2
- Battery connects via JST PH2 to J2
BOM
💰 Estimated total: ~$174 USD — can drop to $120–$140 buying locally.
| Component | Spec | Qty | Price | Notes | Link |
|---|---|---|---|---|---|
| Microcontroller (MCU) | nice!nano V2 nRF52840 | ×1 | $7.00 | Clone — cheaper, slightly less reliable | Buy |
| 74AHCT125 Level Shifter | TSSOP-14 | ×1 | $2.52 | Pack of 10 — LED data 3.3V→5V | Buy |
| MCP73831 LiPo Charger | SOT-23-5 | ×1 | $2.50 | Pack of 10 — LiPo charging IC | Buy |
| ME6211 3.3V LDO | ME6211C33 SOT-23-5 | ×1 | $2.20 | Pack of 10 — 3.3V regulator | Buy |
| USBLC6-2SC6 ESD Protection | SOT-23-6 | ×1 | $1.50 | Pack of 10 — USB ESD protection | Buy |
| Gateron Blue Switch | G Pro Blue 5-pin | ×84 | $24.00 | Pack of 100 — 5-pin PCB mount | Buy |
| Kailh Hotswap Socket | MX compatible | ×84 | $7.00 | Pack of 100 | Buy |
| EC11 Rotary Encoder | 20mm with push switch | ×1 | $2.00 | Pack of 5 | Buy |
| Reset Button | SMD tactile 3×4mm | ×1 | $1.50 | Pack of 30 | Buy |
| SK6812 Mini-E RGB LED | Reverse mount | ×84 | $13.50 | Pack of 100 — buy 100, need 84 + spares | Buy |
| 1N4148W Matrix Diode | SOD-123 | ×84 | $1.50 | Pack of 100 — buy 100, need 84 + spares | Buy |
| Resistor 10K | 0603 | ×10 | $1.20 | Pack of 300 | Buy |
| Resistor 5.1K | 0603 | ×5 | $1.30 | Pack of 300 | Buy |
| Resistor 330Ω | 0603 | ×1 | $2.00 | Pack of 500 | Buy |
| Capacitor 100nF | 0805 | ×100 | $2.00 | Pack of 200 | Buy |
| Capacitor 10µF | 0805 | ×1 | $2.20 | Pack of 200 | Buy |
| USB-C Receptacle 16P | GCT USB4105 SMD | ×1 | $4.50 | Pack of 5 | Buy |
| JST PH2 2-pin | PH2.0 2-pin connector | ×1 | $2.00 | Pack of 2 | Buy |
| Polyfuse 500mA | Resettable fuse 1206 | ×1 | $1.70 | Pack of 10 | Buy |
| LiPo 3.7V 2000mAh | 804050, JST PH | ×1 | $9.40 | Price for 2 | Buy |
| Keycap Set | PBT 75% MX compatible | ×75 | $22.50 | 100+ keycaps included | Buy |
| Rotary Knob | Aluminum 6mm D shaft 20mm | ×1 | $2.00 | 2 pieces | Buy |
| PCB Fabrication | 2-layer, FR-4, 1.6mm, HASL | ×5 boards | $22.20 | Minimum 5 pieces | JLCPCB |
| 3D Print — Tray | SLA resin | ×1 | $25.30 | Local 3D printer recommended | JLC3DP |
| 3D Print — Top Plate | SLA resin | ×1 | $8.30 | Local 3D printer recommended | JLC3DP |
| 3D Print — Top Cover | SLA resin | ×1 | $2.65 | Local 3D printer recommended | JLC3DP |
| M3 Screws | M3 × 8mm countersunk | ×10 | $1.00 | Pack of 50 | Buy |
| M3 Standoffs | M3 × 4mm | ×10 | $1.00 | Pack of 50 | Buy |
Schematics note
Schematics is reviewed my multiple people in fallout + AI. there was problem init that i fixed, and now it LGTM repo is surface checked by riitam
Credits
- KiCad — PCB design
- ZMK Firmware — open source keyboard firmware
- Fusion 360 — case design
- nice!nano — nRF52840 BLE module
- Hack Club Fallout — grant that made this real
Made by Nabeel Ahmed (18) × Hashir (17) — Punjab, Pakistan 🇵🇰 BWP
License
MIT
why the heck it dont work
Parts
368| Qty | Value | Footprint | References |
|---|---|---|---|
| 84 | 100nf | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C12, C13, C14, C15, C16, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C29 +68 |
| 84 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +68 |
| 84 | Gateron_Blue | hotswap kahli pritty:SW_Hotswap_Kailh_MX_1.00u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +68 |
| 84 | SK6812Mini-E | LED R footprints:LED_SK6812MINI-E_3.2x2.8mm_P1.5mm_ReverseMount | LED1, LED2, LED10, LED11, LED12, LED13, LED14, LED15, LED16, LED17, LED18, LED19, LED20, LED21, LED22, LED23 +68 |
| 5 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C17, C18 |
| 4 | 10K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R_RST1, R4, R5, R7 |
| 1 | 100nf | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | C75 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C_RF1 |
| 1 | 330R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
| 1 | 5.1K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8 |
| 1 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R9 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 74AHCT125 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U2 |
| 1 | Battery_JST_PH2 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J2 |
| 1 | EC11 | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_MountingHoles | ENC1 |
| 1 | MCP73831 | Package_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.7x1.4mm | U3 |
| 1 | ME6211-3.3V | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | RESET | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KMR2 | BTN1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | D_ESD1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | nice!nano | nice_nano:nice_nano | U1 |
The 360 most common of 368 parts.
Questions
How big is the Ghoost Board PCB?
It measures 319 × 142.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ghoost Board use?
368 parts, built around the 74AHCT125D, MCP73831, 1N4148W and SK6812MINI-E. 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 Ghoost Board KiCad files?
From the Broccoliux/Broccoli-board repository on GitHub, at the commit this page was made from: the board is pcb/Ghoost Board.kicad_pcb and its schematic pcb/2nd page.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ghoost Board design in my own project?
Its repository states no licence, so its author keeps all rights: ask Broccoliux before reusing the design.
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