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Step 4The LED holder
Next we need a way to hold the 98 LEDs in place behind each letter. In drj113's instructable, he made a pcb for the LEDs - this works well, but it also requires a lot of work to etch and drill the board.
I decided to take a 9"x9" piece of cardboard and punch out holes for each LED. I printed out a pattern with the letters (you can use the same file as the transparency, or invert the colors to save ink) and taped it centered on the cardboard. Then I took an awl and punched a hole through the center of each letter that would be lit (photo 3).
Once all the holes are punched, you can remove the paper template.
I decided to take a 9"x9" piece of cardboard and punch out holes for each LED. I printed out a pattern with the letters (you can use the same file as the transparency, or invert the colors to save ink) and taped it centered on the cardboard. Then I took an awl and punched a hole through the center of each letter that would be lit (photo 3).
Once all the holes are punched, you can remove the paper template.
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