In Part 1 of this Arduino UNO Q Elf Detector Series, we mastered the simple dual-core architecture by blinking a single LED. But let’s be honest: a single blinking light isn't going to scare off a determined elf. They make toys; they know how LEDs work. To truly secure the workshop, we need "shock and awe." We are moving to a more sophisticated use case: controlling the Arduino UNO Q’s built-in 13x8 LED matrix display. That is 104 individually controllable LEDs; enough to turn my workbench into a blinding disco of deterrence.



