In this case use 16 LED’s.Ģ) Determine supply voltage, Vs. Divide the total length of polycarbonate by a number in the range given (10.75 / 0.7 = 15.36). The high brightness RGB LED’s must be spaced approximately 0.5in-0.75in apart on center. The ground leads are all connected together.ġ) Determine how many LED’s will be required. Each of the color leads is connected to its respective loop via a current limiting resistor in parallel with the other leads of the same color type. Each LED has four different leads: red, green, blue, and ground. The LED circuit consists of three microcontroller switched loops: one for red, one for green, one for blue. Since, I have the knowledge and machine availability this was the fastest and highest quality option to choose. I chose to have the name plate machine engraved. A CNC machine is the fastest most accurate way to engrave, but requires CNC knowledge, can have high cost and can have limited availability. The second and slightly fancier way of engraving it is to use a CNC machine. Remove any burs or melted polycarbonate from the sheet. A groove with a semi-circular or triangular cross section will transmit the most light.Ĥ) Clean edges. Try not to mill a slot with a rectangular cross-section into the sheet. ![]() Remember the area where material is removed or scuffed will shine in the light of the LED’s. Use dremel to grind away material inside of the text you have created. ![]() The second, use Grafix Rub-onz sheets (hobby Lobby or Dick Blick) to transfer the image to the top of the polycarbonate.ģ) Engrave graphics. The first, place the graphic under the clear sheet and look through it free handing the graphic onto the sheet. This can also be done in a couple different ways. x 10.75in.Ģ) Transfer the outline of the graphics. For the average do it yourselfer the best option is to use a Dremel high-speed rotary tool with some type of engraving bit.ġ) Cut polycarbonate sheet. The engraving of the polycarbonate can be carried out in a couple different ways.
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