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Step 3Curved Circuit Board Pattern
The Pattern
Pic3 shows the shape and dimensions of the single circuit board that is used for the lantern. I like to first make the pattern out of card board to test if the dimensions are right and it will bend in the right places.
The circuit board material is so thin (.007") that it can in fact be cut with ordinary scissors. You can hand sand the edges smoother if you like.
The Layout
Two layers of vinyl shelf liner are placed sticky side in to sandwich the circuit board. This provides the resist for etching the board.
Pic4 shows the layout of where the vinyl will be cut out. I like to freehand sketch the cutouts in pencil, make any corrections necessary and then go over the lines with a sharpy.
Pic5 shows the pattern to be cut out on the back side.
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