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For this project I created two 2 cm x 8 cm PC boards each with 6 green LEDs.  I drive the LEDs with an Arduino so that the jack o'lantern eyes appear to move. ...
In my project, I convert my face into a glowing menacing ghoul.  I use yellow florescent face paint in an air brush to give my face an overall glow.  I then use more florescent paint to indicate veins and arteries.   I put on a custom made gorget that includes three ultraviolet LEDs in 3-D printed projectors bases.  These are wired to a AA battery holder built into the underside of the gorget.  The ultraviolet LED provide the illumination to make me glow in the dark. ...