2 layers96 × 74 mm
MacroController
alex1klimovich/nrf52840-macro-controller
Custom nRF52840 productivity controller for digital artists — PCB, BLE/USB firmware, OLED, haptics, RGB, and enclosure CAD.
78 parts1
2 layers88.7 × 85.7 mm
Hackpad
Ckacha/Hackpad1Hackpad for blueprint!
- Size
- 88.7 × 85.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 28
- Pads
- 118
- Tracks, vias
- 235, 7
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 21 Nov 2025
- Updated
- 3 Dec 2025
Overview
Hackpad is an open-source printed circuit board by Ckacha, from the Ckacha/Hackpad repository on GitHub. It is a 2-layer board of 88.7 × 85.7 mm with 25 parts on 28 nets, routed with 235 tracks and 7 vias.
It is built around the 1N4148WT and SK6812MINI-E. Its parts include 13 diodes, 10 switches, 1 IC and 1 connector. It belongs with the lEDs and displays boards and the RP2040 boards of this library.
Main components
2
1N4148WT
SOD-523-55℃~+150℃ 1.25V@150mA 100V 150mA 150mW 1uA@75V 2A 4ns Independent SOD-523 Switching Diodes ROHShongjiachengSwitching 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)
README
README.mdDuck v1 Hackpad
Hackpad for blueprint!
This is a small 9-key macropad with a rotary encoder, OLED display, and SK6812 MINI-E RGB LEDs.
I usually only make CAD models, so this was my first time properly making a PCB-really fun!!!
Designed to be a compact editing/drawing pad.
Features
- 3×3 layout
- EC11 rotary encoder
- 0.91" 128×32 SSD1306 OLED display
- 4× SK6812 MINI-E RGB LEDs
- Seeed XIAO RP2040
CAD Model
Made in Fusion360. Everything fits together with heatset inserts and M3 screws.
PCB
| Schematic | PCB Front | PCB Back |
|---|---|---|
 |  |  |
Cost estimate:
Rendered PCB:
Firmware Overview
This macropad uses QMK-style firmware! (Still need to make it though...)
BOM
Every part used for this macropad is listed below (also available in BOM.csv):
- 9× MX mechanical switches
- 9× DSA keycaps (or any MX-compatible cap)
- 9× 1N4148 diodes (through-hole)
- 1× XIAO RP2040
- 1× EC11 rotary encoder (KY-040 module or bare EC11)
- 1× 0.91" 128×32 OLED Display (GND–VCC–SCL–SDA)
- 4× SK6812 MINI-E addressable RGB LEDs
- 6× M3×5×4 mm heatset inserts
- 6× M3×16 mm screws
- 1× Custom PCB
- 1× 3D-printed case (top + bottom)
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 1N4148WT | Diode_THT:D_DO-34_SOD68_P7.62mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8, D9 |
| 9 | SW_Push_45deg | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 |
| 4 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D13, D14, D15, D16 |
| 1 | Conn_01x04_MountingPin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | RotaryEncoder_Switch_MP | OPL:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW10 |
| 1 | XIAO-RP2040-DIP | OPL:XIAO-RP2040-DIP | U5 |
Questions
How big is the Hackpad PCB?
It measures 88.7 × 85.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hackpad use?
25 parts, built around the 1N4148WT 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 Hackpad KiCad files?
From the Ckacha/Hackpad repository on GitHub, at the commit this page was made from: the board is PCB/hackpad.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hackpad design in my own project?
Its repository states no licence, so its author keeps all rights: ask Ckacha before reusing the design.
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