Urchin 🪸

I created this design because I wanted to upgrade my Sweep with the fancy nice!view displays. I decided to use the edge design from the Swoop and to make it compatible with Kailh hotswap sockets. This is a strictly wireless-only design, and is only compatible with ZMK / nice!nano. Only Choc v1 switches + Hotswap are supported!

Q: Why is this not just another Sweep? A: In order to support the nice!view display I had to use a switch matrix with diodes instead of the Sweep's direct pin design. This means that the firmwares are not interchangeable. I also wanted to use a different PCB shape which makes it incompatible with Sweep cases.

If you enjoy my work, please consider ⭐ starring and/or ❤ sponsoring it.

Sponsors

Support the people that support me! 🙏🏻

Features

• Design fully optimized for wireless
• Native nice!view support
• Familiar Ferris/Sweep layout
• Improved outline shape
• Support for Kailh hotswap sockets
• Mounting points for cases
• 3D printable enclosure case
• Switch Plate files (3 options)
• MCU/Screen Cover files

Part list (for a full keyboard)

Required

• 1× PCB Kit (files for it are in releases)
• 34× Kailh CHOC Hotswap Sockets
• 34× Kailh Choc v1 Switches
• 34× Keycaps
• 34× SMD diodes (SOD-123)
• 2× nice!nano
• 2× Lipo battery (301230)
• 48× mill-max machined pins
• 2× Pair of female headers

Optional

• 2× nice!view
• 2× Reset switch (B3U-1000P(M))
• 2× Power switch (MSK 12C02)
• 10× adhesive silicone feet

Case (NEW!)

Coral Case	Description
	The official Coral case is available on Makerworld (for free). Other cases can be found in this repository inside the 3d-prints folder.

[!NOTE]
Installing a case, microcontroller cover, or screen acrylic cover will require additional M2 hardware not included in this list. (Like screws, standoffs, nuts, heat set inserts)

How do I make this?

Firmware

Urchin supports ZMK only. To get started with ZMK visit the zmk-urchin repository and follow the provided instructions.

More videos about Urchin

• https://www.youtube.com/watch?v=o2W_uG-OBjk

Credits

• PCB edge design by jimmerricks
• Coral, rocks, sand & bubbles by Kneecrust
• The development name "Swipe Light" by Pete
• Nice!view integration reference: sadekbaroudi/sweep36
• ZMK Firmware help by Mabroum & Bravekarma
• Silkscreen labels style: bastardkb/dilemma
• 3d case by iamDrakkir
• 3d case by chewiedies
• 3d case by carrefinho
• Coral logo idea by exosr on discord