Electronics enthusiast and Instructables member "LGConcepts" found some synergy between Arduino and Valentine Day with this unique project. With some plexiglass, basic hardware, Arduino and LEDs he created a sign with a romantic message that can be selectively illuminated with the LEDs shining through the plexiglass. The light shines through the vertical sign and is refracted by the cut-away letters of the message which are then illuminated, for example:
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