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Liatris Microcontroller

SKU SKB-CON-LTR-010
Sold out
Original price €14,87 - Original price €14,87
Original price
€17,99
€14,87 excluding taxes
€14,87 - €14,87
Current price €17,99
€14,87 excluding taxes
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There is a limit to this item of 10 per customer. If you need more, please mail us the items and quantities you'd like to order for a custom invoice. Thank you for understanding!

The Liatris will become available for preorder by November 2022, as we await the production and testing of the second revision prototypes.

The Liatris is a new controller designed by splitkb.com that's a designed specifically for (split) keyboards. It's a drop-in replacement for the Pro Micro, and a perfect alternative for other RP2040-based controllers.

Core features

  • Designed for maximum compatibility with kits that work with Pro Micro controllers, including the Kyria and our Aurora Series.
  • Supports QMK and ZMK firmware out of the box. Also compatible with KMK and CircuitPython.
  • Has 128Mbit of flash memory, ensuring you'll never run out of space even when making heavy use of OLED animations or text expansion macros.
  • Access to 23 GPIO pins to use on your keyboard, meaning that on any Aurora Series keyboard, you'll have 5 pins left over for any modifications you may want to do.
  • Rear-facing single-button reset circuit, allowing you to use the keyboards' onboard reset button without firmware changes, and allows you to easily reach the button on barebones builds.
  • An ultra-low profile with a mid-mounted USB-C port and a mere 1mm thick PCB. The rear-mounted reset button checks in at only 0.35mm, too, like it's almost not there.
  • Supports at least 1A of power output, so you can maximize the output of your LEDs when your computer outputs enough power.

Advanced features

The default settings are right for most people out of the gate. For those who demand more of their controller, we have some advanced features:

  • 5V tolerant I2C pins so you won't have to worry about a thing when hooking up an I2C device like an OLED or trackball board;
  • Runs at 3.6V for better 5V signal compatibility so your LEDs will listen better to those smooth colour change commands;
  • Selectable voltage on the VCC (defaults to 5V to support RGB LEDs) and RAW pins (which we named VA, and isn't connected by default to be compatible with common Corne-style kits that bridge VCC with RAW on the keyboard by default) for when you need to get specific with your kit;
  • USB data pads for hand wired builds where you want to have a separate USB port somewhere else on the board;
  • Debug pads to be able to better look into microcontroller behaviour when you really need to.

Frequently asked questions

Question: On a split keyboard, can I use a Liatris as the main controller and a Pro Micro/Elite-C as the peripheral?

Answer: You can not. They aren't compatible with one another. You can, however, use another RP2040 controller as either the main or peripheral controller, like the Elite Pi.

Remarks

  • While the I2C pins are 5V tolerant, they don't like a direct short to 5V. Pulling them up to 5V with resistors is supported, though, which is the primary use in keyboards.
  • While the I2C pins are 5V tolerant, take care to not put 5V onto the other IO pins. They won't like that! When using this controller with kits sold at splitkb.com, this scenario won't happen. With other kits, it also likely won't happen, but it can't hurt to check.

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