2 layers50 × 35 mm
2 layers92 × 80 mm
Devanpad
devansmell/devanpadfollowing hackpad tutorial from hack club!
- Size
- 92 × 80 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 17
- Nets
- 14
- Pads
- 34
- Tracks, vias
- 52, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 1 Jun 2026
- Updated
- 1 Jun 2026
Overview
Devanpad is an open-source printed circuit board by devansmell, from the devansmell/devanpad repository on GitHub. It is a 2-layer board of 92 × 80 mm with 17 parts on 14 nets, routed with 52 tracks and 0 vias.
Its parts include 4 switches and 1 IC.
README
README.mddevanpad
devanpad is a 4 key macropad with an OLED Display, and QMK firmware.
It serves as an example piece/reference for the hackpad YSWS, since it contains an implementation of every common part.
Features:
- Open faced
sandwichPCB board design. - OLED Date and Time / Customisable text through python!
- 4 Keys for whatever you want!
CAD Model:
I quite like the aesthetics of an open PCB, makes me feel like a bond villian; so I am only making a base for the circuit board to sit into. Everything is held together by 4 screws going into the base through the PCB.
Modeled in OnShape.
PCB
Here's my PCB! It was made in KiCad. The silkscreen is a collection of inside jokes and random images from my computer.
Schematic
PCB
I used Cherry MX1's for the keyswitch footprints. My routing is god awful but if it aint broke dont fix it !!!!
Firmware Overview
Originally I planned to use QMK firmware, but I switched to CircuitPython + KMK because it made OLED control and development significantly easier.
The firmware:
- Reads key inputs via KMK
- Drives OLED display in real time
- Receives time/date from a Python script over USB serial
- Cycles display modes using a keypress
Host Software (PC Time Sync)
The keyboard receives live system time and date from a Python script running on the computer.
Setup
pip install -r host/requirements.txt
python host/main.pyThis sends:
- Current time every second
- Current date updates
- Optional mode switching commands
OLED Modes
Mode 0 — Time
Displays current time from the PC.
Mode 1 — Date
Displays current date from the PC.
Mode 2 — Hello Screen
A simple greeting screen.
BOM:
Here should be everything you need to make this hackpad
- 4x Cherry MX Switches
- 4x DSA Keycaps
- 5x M3x5x4 Heatset inserts
- 2X M2x12mm SHCS Bolts
- 1x 0.91" 128x32 OLED Display
- 1x XIAO RP2040
- 1x Base (3D Printed)
- 1x Soldering Iron (I don't own one)
Build Notes
Designed as a simple open PCB macropad Firmware is fully CircuitPython-based (no compilation required) OLED is driven over I2C PC <----> device communication uses USB serial
Extra Stuff
Built this over a whole day and somehow didn’t realize it didn’t count toward my hackatime hours #killme
Theoretically this will work
Parts
17| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | LOGO | LOGO | devan 2026, G***, G***, G***, G***, G***, G*** |
| 4 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_Plate | SW1, SW2, SW3, SW4 |
| 1 | ER_OLEDM0.91_1x-I2C | Display:ER_OLEDM0.91_1x-I2C | OLED |
| 1 | MOUDLE-SEEEDUINO-XIAO | chud:XIAO-Generic-Hybrid-14P-2.54-21X17.8MM | U1 |
The 13 most common of 17 parts.
Questions
How big is the Devanpad PCB?
It measures 92 × 80 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Devanpad use?
17 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 Devanpad KiCad files?
From the devansmell/devanpad repository on GitHub, at the commit this page was made from: the board is pcb/devanpad.kicad_pcb and its schematic pcb/devanpad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Devanpad design in my own project?
Its repository states no licence, so its author keeps all rights: ask devansmell before reusing the design.
Similar boards
- 2 layers139.7 × 62.2 mm
- 2 layers29.2 × 55.9 mm
Deniseadapter
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
17 parts1kGPL-3.0 - 2 layers24.5 × 36.5 mm
- 2 layers56.3 × 55.7 mm
StarNecklace
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
17 parts915 - 2 layers25 × 25 mm
SmallEncoder
DDeGonge/OS-ARM
This arm is not industrial and it will not be fast, but that is not my goal. But it will hopefully be a very nice looking arm fully capable of 6dof motion, cheap enough to keep it accessable but capable enough to…
17 parts498MIT - 2 layers38.9 × 16.1 mm
- 2 layers36 × 51 mm
