2 layers299 × 82.5 mm
PixelWave
hackclub/OnBoard
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663 parts915
2 layers89.1 × 67.4 mm
Hackpad
TAB1540/TAB1540multipadoldTAB1540multipad is a 8 key macropad with 2 rotary encoders, an OLED Display. It also has 4 WS2812B Leds, and uses modified KMK firmware.
- Size
- 89.1 × 67.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 33
- Pads
- 134
- Tracks, vias
- 223, 7
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 22 Jul 2025
- Updated
- 22 Jul 2025
Overview
Hackpad is an open-source printed circuit board by TAB1540, from the TAB1540/TAB1540multipadold repository on GitHub. It is a 2-layer board of 89.1 × 67.4 mm with 32 parts on 33 nets, routed with 223 tracks and 7 vias.
It is built around the SK6812. Its parts include 12 diodes, 10 switches, 8 resistors and 1 IC. It belongs with the keyboards and input and lEDs and displays boards and the RP2040 boards of this library.
Main components
1README
README.mdTAB1540multipad
TAB1540multipad is a 8 key macropad with 2 rotary encoders, an OLED Display. It also has 4 WS2812B Leds, and uses modified KMK firmware.
Features
- Basic abs 3d printable case
- 128x32 OLED Display
- 2 EC11 Rotary encoders using resistor ladder to control both of them using 1 analog gpio pin (idk if the firmware is even work)
- 4 WS2812B RGB LEDs.
- 8 keys
CAD demo
Everything fits together using 4 M3 Bolts. Case is made from 2 parts.
Designed using freeCAD 1.0.1 (first time for me)
PCB
This is my PCB, which was made in KiCad.
PCB
Schematic
Firmware Overview
This hackpad uses KMK firmware for maybe everything
- The rotary encoder changes volume. press do nothing
- The 4 keys is just keys
- The OLED is something I forgor
BOM:
Here should be everything you need to make this hackpad
- 8x Cherry MX Switches
- 8x DSA Keycaps
- 4x M3x16mm SHCS Bolts
- 8x 1N4148 DO-35 Diodes.
- 4x WS2812B LEDs
- 1x 0.91" 128x32 OLED Display
- 2x EC11 Rotary Encoder
- 1x XIAO RP2040
- 1x Case (2 printed parts)
Extra
The firmware is a modified kmk so use the whole thing and not just the main.py pls
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1N4148 | 1N4148.zip:DIOAD753W49L380D172B | D1, D2, D3, D4, D5, D6, D7, D8 |
| 8 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 |
| 5 | 200k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R5, R6, R7, R8 |
| 3 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R4 |
| 3 | SK6812 | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D12, D13, D14 |
| 2 | RotaryEncoder | Rotary encoders:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW9, SW10 |
| 1 | 1 | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D11 |
| 1 | XIAO-RP2040-DIP | OPL_KiCAD_Lib:XIAO-RP2040-DIP | U1 |
The 31 most common of 32 parts.
Questions
How big is the Hackpad PCB?
It measures 89.1 × 67.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hackpad use?
32 parts, built around the SK6812. 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 TAB1540/TAB1540multipadold repository on GitHub, at the commit this page was made from: the board is pcb/hackpad.kicad_pcb and its schematic pcb/hackpad.kicad_sch. 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 TAB1540 before reusing the design.
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