Place Your Drink Down on this Mesmerizing Infinity Mirror Coaster!
An infinity mirror shrunk to the size of a (rather large) drink coaster, driven by an ATtiny85.
We’ve all seen infinity mirrors, which use two reflective surfaces to bounce light back and forth multiple times, making it appear that you’re staring into infinity. You may have seen the same sort of effect in a dressing room or gym, where you are actually inside of this “infinite realm." This build by MnMakerMan, however, reduces the effect down to a size that can be used as a drink coaster.
The top of the device is constructed with a 4" diameter Plexiglass circle, coated with a one-way mirror window tint film and backed by a simple 4" round mirror inside. Between the two is an array of programmable WS2812B LEDs, which provide the “infinite light." The electronics are hidden in another shallow cylinder behind the mirrors, including an ATtiny85 for control and a trio of 220μF capacitors wired in parallel to help drive the LEDs. 1000μF is recommended for these types of LEDs, but this solution seems like it works well enough, and allows it to stay fairly slim.
Everything is laid out of a custom PCB, and the coaster includes accommodations for a LiPo battery, as well as a micro USB charging circuit. The project is explained in the video below, and the necessary files can be found here if you’d like to build your own.