Electronic Design - PCB copy board, reverse design method

Copying board method:

The first step, get a PCB board, first of all on the paper to record all the components of the model, parameters, and position, especially the diode, triode direction, IC notch direction. It is best to take two pictures of the position of the ski with a digital camera

Step 2: Remove all components and remove the tin from the PAD holes. Clean the PCB with alcohol, then put it in the scanner, start photoshop, color the screen screen and print it out for later use.

The third step is to polish the TOP LAYER and BOTTOM LAYER slightly with water yarn paper until the copper film shines. Then put the two layers into the scanner, start PHOTOSHOP, and sweep the two layers in color respectively. Note that PCB must be placed horizontally and vertically in the scanner, otherwise the scanned image cannot be used, scanner resolution please set to 600.

The fourth step, adjust the contrast and shade of the canvas, so that the part with copper film and the part without copper film contrast strongly, and then turn the picture to black and white, check whether the lines are clear, if not, repeat this step. If clear, save the picture as black and white BMP files top. BMP and bot.bmp. Use image processing software to convert the size of the picture to 38.64 times of the original physical size, and then use BMP to PCB software for conversion. Note: BMP images should be stored in black and white format, not in other color formats, otherwise BMP to PROTEL file software can not be converted.

Step 5: Convert the two BMP files into PROTEL files respectively, and transfer two layers into PROTEL. For example, the positions of PAD and VIA that have passed two layers basically coincide, indicating that the previous steps have been done well. If there is any deviation, repeat the third step.

Step 6, TOP. BMP is converted to TOP. PCB, make sure to transfer to SILK layer, the yellow layer, then you trace the line on TOP layer, and place the device according to the drawing in step 2. Delete the SILK layer after painting.

Step 7, the BOT. BMP is converted to BOT. PCB, be sure to convert to SILK, the yellow layer, and then trace on the BOT layer. Delete the SILK layer after painting.

Step 8, select TOP in PROTEL. PCB and BOT. PCB call in, combined into a picture is OK.

Step 9, use laser printer to print the TOP LAYER and BOTTOM LAYER to transparent film (1:1 ratio), put the film on that PCB and compare if there is any mistake, if yes, you are done

Advanced PCB board copying actual combat skills and board copying methods:

1. Scan the circuit board picture

2. Run Quickpcb2005

3. Enter the scanned circuit board picture from the file menu

4. This software provides measuring tools and calculators to place arbitrary elements directly on color images after scanning

5. After copying the top layer, open the layer Settings menu, close the top layer, and import the bottom image from the file menu

6. Copy out the other inner layers in turn

7. Save PCB files and complete board copying