Build Your Own Pressure Sensitive LED Drink Coasters

LED CoasterThe good folks over at MetkuMods are at it again, this time with yet another killer use for the cheap, plentiful, and bright LCDs that are available everywhere nowadays. Using only some scrap acrylic, a few LEDs, and a lithium battery, “Jani ‘Japala’ Pönkkö” has developed an easy-to-build coaster that lights up when in the presence of a drink (just like me), and turns off when the drink is removed. Check out the schematic, photos, and build log.