The first step is to get a PCB. First, record the models, parameters, and positions of all the vital components on the paper, especially the direction of the diode, the three-tube tube, and the direction of the IC notch. It’s best to take two pictures of the location of the element with a digital camera.
The second step is to remove all components and remove the tin from the PAD hole. Clean the PCB with alcohol, then put it into the scanner, start POHTOSHOP, scan the silk screen surface in color, and print it out for use.
The third step is to slightly polish the two layers of TOP LAYER and BOTTOM LAYER with water gauze paper until the copper film is shiny. Put it into the scanner. Start PHOTOSHOP, and scan the two layers in color. Note that the PCB must be placed horizontally and straight in the scanner, otherwise the scanned image will not be available.
The fourth step is to adjust the contrast and brightness of the canvas to make the part with copper film and the part without copper film have a strong contrast, and then turn the second image into black and white to check whether the lines are clear, if not, repeat this step. If it is clear, save the image as black and white BMP format files TOP.BMP and BOT.BMP.
The fifth step is to convert the two BMP format files into PROTEL format files respectively, and transfer two layers in PROTEL. For example, the positions of PAD and VIA after the two layers are basically the same, indicating that the first few steps are well done. If there is a deviation, repeat the third step.
Sixth, convert TOP. BMP to TOP. PCB. pay attention to convert it to the SILK layer, which is the yellow layer, and then you can trace the line on the TOP layer, and place the device according to the drawing in the second step. After painting, delete the SILK layer.
The seventh step, convert the BOT. BMP to BOT. PCB, pay attention to convert it to the SILK layer, which is the yellow layer, and then you can trace the line on the BOT layer. After painting, delete the SILK layer.
The eighth step is to TOP in PROTEL. PCB and BOT. The PCB is transferred in, and it is OK to combine it into one picture.
The ninth step, use a laser printer to print the TOP LAYER and BOTTOM LAYER on the transparencies respectively (1:1 ratio), put the film on the PCB, and compare whether there is any error. If it is correct, it is done.
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