And it looks like that simply wasn't bright enough for the people behind the ACEFIT Pro in-ears – they ... bit where a "light matrix" of multiple bright LEDs can light up and flash.

Just such a project is [Radomir Dopieralski’s] set of wearable mechatronic cat ears. A cosplay accessory that moves as you do. Very kawaii, but fun. You may have seen the commercially available ...