Keyboard Builders' Digest
Save 10% at AKKO DE! Code: KBDNEWS
Keyboard Builders' Digest / Tips & Tricks

0xCB Helios

The 0xCB Helios is an Elite-C compatible development board sporting an RP2040 chip.

KBD.news
Published January 2, 2023
Creators! Feel free to tip me off about your keyboard related projects to bring them to 120K readers.

After the 0xCB Pluto sporting an Atmega32u4, Jakob and Conor announced the 0xCB Helios with an RP2040 chip. Pro Micro/Elite-C compatible, open source, and available at keeb.supply as well.

The Pluto is based on the AtMega, Helios is based on RP2040. With this new IC the controller gets cheaper, but is way more powerful feature and space wise. You can do a lot more stuff with displays for example – 0xCB-dev.

Specs

  • Pro Micro/Elite-C compatible footprint
  • 26 GPIO pins
  • 16MB (128Mbit) of flash
  • Dual ARM Cortex-M0 @133MHz
  • 264kB SRAM
  • default off red power LED
  • blue user LED
  • a level-shifter to drive 5V components
  • onboard ESD protection chip
  • VBUS detection support for split keyboards
  • D+ and D- pads
  • "unbrickable" bootloader: its located in ROM on the rp2040 itself
  • single button reset circuit (reset the board with a short press and enter the bootloader with a long (>500ms) hold).
  • price: €17 (with headers for all three sides)

The one button reset circuit is based on the one used on the Sea-picro by Josh Johnson.

No silk art this time, the 0xCB team opted for a stealth design to go as sleek as possible so that the controller blends in with most keyboards.

Resources

Do you like this post? Share, donate, subscribe, tip me off!

Published on Mon 2nd Jan 2023. Featured in KBD #109 (source).


Related

RP2040 Stamp

The RP2040 Stamp is a RP2040-based controller with LiPo charger and Neopixel – breaking out all GPIO pins.

Technoblogy RP2040

A minimal controller sporting a RP2040 chip with all the 30 GPIO pins broken out – designed by Technoblogy.

Elite-C holder PCB

Elite-C holder PCB for Dactyl-like cases with audio jack, M4 screw holes, reset button, RGB output by Fmcraft (git).

0xB2 - splinky controller

0xB2 - splinky is a Pro-Micro/Elite-C replacement development board by plut0nium – with USB-C and RP2040.

RP2040 Bento

The RP2040 Bento, a relatively low profile breakout board without a USB connector, has been open-sourced by hainguyenac.

RP2040-Zero

The RP2040-Zero is a tiny RP2040 based controller with USB-C and 20(+9) GPIO pins.

×
top