Adding LEDs

[stevenvo]

Is it possible to add LEDs or any type of lighting to the board?

[debido666]

I too would like to know. Seems like it should be easy to add cheap RGB LED strips on the bottom of the PCB for people with Acrylic cases.

[eskimotherapy]

LED strip can be added by connecting GND and +5v on the underside of the ISP headers. Not sure about programmability.

source: u/thearctican @ https://www.reddit.com/r/MechanicalKeyboards/comments/f5kbc6/cftkb_mysterium_transparent_grey/

[debido666]

It uses an ATMEGA32A-PU. (V2 model)
I imagine (hope) one just needs to find the right pin for addressing and add/enable RGB functions in firmware.
Guess I'll find out in October. When mine arrives.

[d1554573r]

There is a similar topic in the discipline issues section. I'm trying to get this sorted but I get an unrecognized USB device error after flashing the firmware. I guess we can't use a pin already taken for rows or columns?

Anyway, QMK supports only certain types of LED strips: https://beta.docs.qmk.fm/using-qmk/hardware-features/lighting/feature_rgblight

LEDs have to be enabled in rules.mk and configured in config.h by uncommenting LED part:

#define RGB_DI_PIN A7 #ifdef RGB_DI_PIN #define RGBLED_NUM 16 #define RGBLIGHT_HUE_STEP 8 #define RGBLIGHT_SAT_STEP 8 #define RGBLIGHT_VAL_STEP 8 #define RGBLIGHT_LIMIT_VAL 255 /* The maximum brightness level */ #define RGBLIGHT_SLEEP /* If defined, the RGB lighting will be switched off when the host goes to sleep */ // /*== all animations enable ==*/ #define RGBLIGHT_ANIMATIONS // /*== or choose animations ==*/ // #define RGBLIGHT_EFFECT_BREATHING // #define RGBLIGHT_EFFECT_RAINBOW_MOOD // #define RGBLIGHT_EFFECT_RAINBOW_SWIRL // #define RGBLIGHT_EFFECT_SNAKE // #define RGBLIGHT_EFFECT_KNIGHT // #define RGBLIGHT_EFFECT_CHRISTMAS // #define RGBLIGHT_EFFECT_STATIC_GRADIENT // #define RGBLIGHT_EFFECT_RGB_TEST // #define RGBLIGHT_EFFECT_ALTERNATING #endif

I bet the problem I got is because A7 is already used as a column pin, I struggle to understand which pins are BX, CX and DX as this naming doesn't match ATMEGA32A pinout schematic.

[stevenvo]

the guide mentions D71 pin used for ISO, I wonder if we can use it to control the rgb...
https://static1.squarespace.com/static/5c533d33348cd92b886e544d/t/5f4597da4c8f740579aec0ca/1598396382120/DISCIPLINE+BUILD+GUIDE.pdf

[d1554573r]

According to the schematic, only C0 & C0 are not taken but if you assign any of them to the LED's you'll get an unrecognized device. Atm I got fixed blue LED's and I would love to replace them with an RBG led.

[this-snow]

According to the schematic, only C0 & C0 are not taken but if you assign any of them to the LED's you'll get an unrecognized device. Atm I got fixed blue LED's and I would love to replace them with an RBG led.

Using Pin 23 - C1 works fine. Controlling the RGB with defined Keys in the Keymap works fine.