using a yellow pcb, add some LEDs on the back like my wordclock pcb and figure out how to control them (possibly an esp12, I would need 6 pins for charlie plexing the 26 letters)
Ooh, here's an extravagant idea! Add some sort of touch sensor for each letter (capsense pads?), then make it so you can pair a badge with another and light up the other badge's letters by touching yours. Maybe add an accelerometer, then make it so you have to turn your badge upside-down to communicate.
Ooh, here's an extravagant idea! Add some sort of touch sensor for each letter (capsense pads?), then make it so you can pair a badge with another and light up the other badge's letters by touching yours. Maybe add an accelerometer, then make it so you have to turn your badge upside-down to communicate.