qmk_firmware/keyboards/ymdk/ymd75/rev2/info.json

{
    "usb": {
        "device_version": "2.0.0"
    },
    "backlight": {
        "pin": "D4",
        "levels": 12
    },
    "indicators": {
        "caps_lock": "D1"
    },
    "processor": "atmega32a",
    "bootloader": "bootloadhid"
}