Adding RGB LEDs to your Lagom board

Lagom supports an underglow RGB LED light strip. This is not included in the kit, but you are able to add a WS2812b (or similar) compatible LED strip to the underside (or case) of the Lagom using the exposed pins on the underside of the PCB.

Where do I add the LED strip?

You add the LED strip using the 3 holes exposed on the underside of the Lagom PCB. To make attaching a strip of LEDs easier it may be easier to add a small socket to these holes as shown in the image below.

How is the LED strip connected to the controller?

  • The GND is connected to the common ground of the board and controller
  • The VCC is connected to the 5V output of the controller
  • The LED pin is connected to pin F6 of the controller

How do I configure the LED strip in firmware?

The LED strip should be possible to use with the precompiled Vial firmware files, though the length of the RGB strip is set to 11 (as that’s the strip length that I tested with). You will need to configure keys to activate and change the RGB settings within Vial to use them though. You can do this through the Vial interface on the ‘Backlight’ tab.

To change the length of the LED strip and for non Vial compatible firmware files you will need to compile the firmware yourself using QMK or vial-qmk (if you want to maintain Vial compatibility). For more information on how to do this, take a look at the QMK documentation and how I configured it in the info.json file here.

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