2 layers27.9 × 16.5 mm
2 layers75.5 × 52.6 mm
HackPad
UKASITECH/HackPadA custom USB macropad with programmable keys for coding, productivity, and media controls. I will design the enclosure, PCB, and firmware from scratch.
- Size
- 75.5 × 52.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 22
- Pads
- 76
- Tracks, vias
- 101, 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 6 Jun 2026
- Updated
- 8 Jun 2026
Overview
HackPad is an open-source printed circuit board by UKASITECH, from the UKASITECH/HackPad repository on GitHub. It is a 2-layer board of 75.5 × 52.6 mm with 18 parts on 22 nets, routed with 101 tracks and 2 vias.
Its parts include 8 diodes, 8 switches and 1 IC. It belongs with the keyboards and input boards and the SAM D and SAM boards of this library.
README
README.mdHackpad
built by Umang Kumar Singh for HackClub 2026
Hackpad is my first crack at a hardware project — a simple macropad with seven keys and a rotary encoder. Seven keys for whatever macros you want (calculator hotkey, anyone?), and the encoder handles volume or media scrubbing.
The body is two 3D-printed shells held together with M3 screws and heat-set inserts, with a translucent acrylic plate sandwiched in between. The plate can be swapped out pretty easily if you ever want to change the look.
Under the hood it runs QMK with two layers — a mix of keys I don't have easy access to on my main keyboard, plus a few keycodes I thought were amusing. The 128x32 OLED scrolls through very important and relevant information on loop.
Overall this was a blast. I'd never done PCB design before, and learning KiCad from scratch was surprisingly rewarding. The case was straightforward in CAD, and working around the PCB constraints made for a fun little puzzle. Firmware was the biggest headache, but after digging through QMK and XIAO docs for a while things started clicking. Once the parts arrived, assembly was smooth — I only had to reprint the case once.
9/10. Would build again.
PCB
Bill of materials
- 7x Cherry MX-style keyswitches.
- 4x M3x12mm screws
- 4x M3 X D4.6 X L3.6
- 8x 1N4148 Diodes (through hole)
- 1x EC11 Rotary encoder
- 1x 0.91 inch SSD1306 OLED
- 14x Mill-Max 3305s or 0305s.
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | D | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8 |
| 7 | SW_Push_45deg | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6, SW7 |
| 1 | OLEd | Library:SSD1306-0.91-OLED-4pin-128x32 | O1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW8 |
| 1 | Seeed Studio XIAO SAMD21 | Library:XIAO-Generic-Thruhole-14P-2.54-21X17.8MM | U1 |
Questions
How big is the HackPad PCB?
It measures 75.5 × 52.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the HackPad use?
18 parts. 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 UKASITECH/HackPad 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 UKASITECH before reusing the design.
Similar boards
- 2 layers42.7 × 13.7 mm
Stm32-mini12864
VoronDesign/Voron-Hardware
Cool Hardware designed by the Voron Design group
18 parts1.1kGPL-3.0 - 2 layers41.2 × 46.6 mm
- 2 layers44 × 51.3 mm
4272MAVcoder R4
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
18 parts915 - 2 layers28.3 × 14.3 mm
Tap Photosensor PCB
VoronDesign/Voron-Tap
Tap is a nozzle-based z-probe for the V2 and Trident printer designs. The entire toolhead moves to trigger an optical switch. Tap offers many advantages:
18 parts716GPL-3.0 - 2 layers20.3 × 15.2 mm
L0 stepper driver
Luos-io/luos_engine
Open-source and real-time orchestrator for cyber-physical-systems, to easily design, test and deploy embedded applications and digital twins.
18 parts546MIT - 2 layers
- 2 layers42.5 × 28.8 mm
C5VRX JACK DIY V2
Twotoz/C5VRX
Ultra-minimal, zero-CPU 5.8 GHz analog FPV video receiver using ESP32-C5 Wi-Fi 6 PHY MODEM_DIAG, BitScrambler WBFM demodulation & resistor DAC CVBS
18 parts515GPL-3.0