
Nrf bga
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A custom Gravity Falls-themed hackpad designed to encode and decode ciphers from the series.
HACKPAD is an open-source printed circuit board by Iv4e12, from the Iv4e12/HACKPAD repository on GitHub. It is a 2-layer board of 122.5 × 87.5 mm with 12 parts on 14 nets, routed with 82 tracks and 1 via.
Its parts include 5 switches and 2 ICs.
A custom Gravity Falls-themed hackpad designed to encode and decode ciphers from the series.
The hackpad uses a Seeed XIAO RP2040, an OLED screen, a rotary encoder, and four switches.
I designed the PCB myself using KiCad and wrote the software in Python. One of the biggest challenges was learning KiCad and finding the correct footprints for each component.

Designed and built by me, with light assistance from AI.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 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 | U2 |
| 1 | MOUDLE-SEEEDUINO-XIAO | footprints:XIAO-Generic-Hybrid-14P-2.54-21X17.8MM | U1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW5 |
The 7 most common of 12 parts.
It measures 122.5 × 87.5 mm and has 2 copper layers, 1.6 mm thick.
12 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.
From the Iv4e12/HACKPAD repository on GitHub, at the commit this page was made from: the board is PCB/hackpad.kicad_pcb and its schematic PCB/_restore_backup_2026-08-20T22-49-05-171/hackpad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask Iv4e12 before reusing the design.

github-linguist/linguist
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