Modular C‑Deck - Clamshell Palmtop

A DIY portable cyberdeck designed to work with any smartphone up to 13 mm thick, the Modular C‑Deck builds on the original Pixel 3 XL NetHunter C‑Deck with a fully modular design. It features a replaceable phone insert, making it easy to adapt the clamshell case to different devices.

The clamshell form factor provides comfortable typing and efficient mobile workflow, turning your phone into a pocket-sized command terminal for serious on-the-go technical tasks.

The wireless keyboard I used was purchased from AliExpress (Link), but similar models can be found on Amazon under different brand names (Link).

The replaceable phone insert is a separate project published with Fusion 360 source and STEP files. 

• Phone Case Insert Template

• Pixel 3XL Phone Case Insert

• Pixel 7 Phone Case Insert

• Pixel 9 Pro XL Phone Case Insert

• Poco X3 Phone Case Insert

Additional information related to the project can be found on the hackaday.io project page 

20.02.2026 Update

• Added Modular C-Deck v2.0 with a magnet lock instead of a slider.  You will need 20x5x2 mm neodymium magnets for this version of the case.