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Step 2Make the PCB
Once you have all the tools and components, the first step is to prepare the PCB to solder the LEDs on.
Measure the diameter of the lens and the diameter of the rim of the loupe. Let A be the diameter of the lens and B the diameter of the rim. The inner diamater (ID) Of the annular PCB should be equal to A and the outer diameter of the annular PCB should be equal to B.
An eagle brd file for our annular PCB can be downloaded from this instructable and used as is or modified for your particular loupe dimensions.
We used a Modela milling machine to cut the PCB, but with a bit of effort and patience, you can actually do it manually with a drill machine and dremel tool to separate the copper in two circular concentric bands.
Measure the diameter of the lens and the diameter of the rim of the loupe. Let A be the diameter of the lens and B the diameter of the rim. The inner diamater (ID) Of the annular PCB should be equal to A and the outer diameter of the annular PCB should be equal to B.
An eagle brd file for our annular PCB can be downloaded from this instructable and used as is or modified for your particular loupe dimensions.
We used a Modela milling machine to cut the PCB, but with a bit of effort and patience, you can actually do it manually with a drill machine and dremel tool to separate the copper in two circular concentric bands.
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