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Step 4Prepare Board
So we want to start the layout out with a bunch of guide lines on the main poster board. I first made a grid for the main boxes, 4 inch x 4inch. Then you need to make sure that the LED's are centered in each of the 25 box's. So draw an X in each of the boxes, which if all is laid out correctly you can draw the lines down the length of the board in a X pattern... Kinda hard to see in the pictures, sorry.
Now that you have it all laid out, grab a drill and drill bit. Choose drill bit size that is a little smaller then the end of the led itself, example: if you are using 5mm LED's then maybe go for a 3 or 4 mm drill bit. Now in the center of each box you should have an X, and at the cross of the X should be the very center of each box. So that is where you need to drill the holes!
Now that you have it all laid out, grab a drill and drill bit. Choose drill bit size that is a little smaller then the end of the led itself, example: if you are using 5mm LED's then maybe go for a 3 or 4 mm drill bit. Now in the center of each box you should have an X, and at the cross of the X should be the very center of each box. So that is where you need to drill the holes!
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