https://github.com/Bastardkb/Splinky

Pro-Micro/Elite-C replacement with RP2040 and USB-C
https://github.com/Bastardkb/Splinky

Last synced: about 6 hours ago
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Pro-Micro/Elite-C replacement with RP2040 and USB-C

• Host: GitHub
• URL: https://github.com/Bastardkb/Splinky
• Owner: Bastardkb
• License: other
• Fork: true (plut0nium/0xB2)
• Created: 2022-04-28T10:48:54.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2023-08-14T14:53:36.000Z (over 1 year ago)
• Last Synced: 2024-08-03T09:05:59.660Z (4 months ago)
• Language: Shell
• Size: 3.08 MB
• Stars: 55
• Watchers: 1
• Forks: 6
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# 0xB2 - splinky

Pro-Micro/Elite-C replacement with USB-C and RP2040.

Designed for use in custom mechanical (split) keyboards, but many other uses are possible.

![Splinky v2](pcb/doc/splinky_v1_photo.jpg?raw=true "Splinvy v1")

**This is a fork from the [0xb2 - splinky](https://github.com/plut0nium/0xB2) by plut0nium.**

**It uses a different usb-C port, which is similar to the one of the elite-C and will fit in the Bastardkb case designs.**

## Features:

 * Pro-micro / Sparkfun RP2040 compatible footprint, with 5 extra pins at bottom (Elite-C style)

 * Raspberry Pi RP2040 MCU

 * Up to 16MB flash memory _(depending on component selection and availability)_

 * User LED & USB VBUS detect

 * Low profile USB-C mid-mount connector

 * Designed to be manufactured and assembled by all common PCBA services (including JLCPCB)

## Pinout

The pinout is compatible with the widely available [SparkFun RP2040](https://www.sparkfun.com/products/18288), with extra GPIO12..16 pins broken out on the lower side.

USB VBUS detection on GPIO19.

> This pinout is a _de facto_ standard, established by actors of the MK community (see discussions in `#RP2040` on the bastardkb Discord server) 

Additionnaly, a user LED is tied to GPIO17, can be used for UF2 bootloader status indication, or any other purpose (or turned OFF, no annoying always-on power LED).

## Programming

The splinky uses a basic two-button reset circuitry.

In order to put the board in bootloader mode, press briefly the RESET button (marked **R**) while holding the BOOT button (the second one).

If the buttons are not reachable (soldered upside down), the /RST pad can be shorted to GND, while the two smaller BOOT pads (next to D8) are maintained shorted (v2 only).

## Manufacturing

Releases contain required information (gerbers, bom, pos) for assembly by JLCPCB.

## Releases

 * **v3** updated pinout - current release

 * **v2** first public release

 * **v1** first prototyping run

## Credits

 * Raspberry Pi Foundation

   * [RP2040 Datasheet](https://datasheets.raspberrypi.com/rp2040/rp2040-datasheet.pdf)

   * [Hardware design with RP2040](https://datasheets.raspberrypi.com/rp2040/hardware-design-with-rp2040.pdf)

 * [SparkFun Pro Micro - RP2040](https://www.sparkfun.com/products/18288)

 * [Adafruit kb2040](https://learn.adafruit.com/adafruit-kb2040)

 * [sea-picro](https://github.com/joshajohnson/sea-picro) - _similar project, I borrowed some cheaper component references ^^_

 * ...