Wednesday, June 1, 2016

Guides on PCB board Copying

How to copy a PCB board? It seems quite difficulty, but here, you will get the answer.
Actually, copying a printed Circuit Board is not so trouble and will reduce your price on buying a new pcb.

1. Get a piece of PCB, record all the strength of the model, parameters, and location, especially the diode, the direction of the three machine, IC gap directionon the paper. It is best to use a digital camera to take pictures of the components location.

2.Remove all the deviceand the tin in PAD hole.Usealcohol to clean thePCB, put it into the scanner, start POHTOSHOP, screen printing surface in the mode of color and print out the spare.

3. Use water-proof abrasive paper to slightly polishTOP LAYER and BOTTOMLAYER until the copper film starts shining, put it into the scanner, start PHOTOSHOP,color scanning the 2 layers respectively . Note that the position of them in the scanner must be horizontal or straight trees, otherwise, the scanning pictures will be useless.

4. Adjust contrast ratio, brightness of the canvas so that there will be strong comparison of the parts with copper file and part without copper film.Then convert this figure into black and white, check if the line is clear or not. If not clear, repeat this step. If clear, save it with the format of black and white BMP, TOP.BMP and BOT.BMP.

5. Transferthe two BMP format files into PROTEL format respectively and input the two layers to PROTEL. If the pad and via position of the two layers can be coincided, it shows that the first few steps were well done.If there is a deviation, then the third step should be repeated.

6.Transfer TOP.BMP into TOP.PCB. Note that it should be transferred to the SILK layer, also the yellow layer,then you can draw the line in the TOP layer. Then you can put the components based on the drawing in step 2. When finished, delete the silk layer.

7.Import TOP.PCB and BOT.PCB in the PROTEL and combine them into one graph,that will be ok.

8.Print TOP LAYER, BOTTOM LAYER into transparencies (1:1 ratio) respectively by a laser printer. Put the film on thePCB and compare if there is any error. If no, ok, you will be accomplished.

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