How To Copy The Original Circuit Samples?The Five Major Steps of PCB Copy Board Analysis

PCB copy board, that is, under the premise that there are already electronic products and circuit boards in kind, the use of reverse technical means of reverse analysis of the circuit board, the original product PCB files, bill of materials, schematic diagrams and other technical documents for 1:1 restore operation, and then use these technical documents and production documents for PCB board, component welding, circuit board debugging, to complete the entire replication of the original circuit prototype board.

First, take a PCB board, the first need to record on paper all the components of the model, parameters and location, especially diodes, tertiary direction, IC gap direction. It is best to use a digital camera to take two photos of the location of the components.

Second, remove all components, to remove the tin in the PAD hole. Use alcohol to scrub the board clean, and then put it into the scanner, in the scanner scanning time to slightly adjust the scanning pixels, to get a clearer image of the board. Then use water gauze paper to lightly sand the top and bottom layers, sanding until the copper film shiny, put into the scanner, start PHOTOSHOP, with a colourful way to scan in the two layers respectively. Note that the PCB in the scanner must be placed within the horizontal and vertical, otherwise the scanned image can not be used.

Third, adjust the contrast of the canvas, brightness and darkness, so that there is a strong contrast between the part of the copper film and the part of the copper film does not form a strong contrast, and then turn the figure to black and white, check whether the lines are clear, if not clear, we must continue to adjust. If clear, the figure will be saved as black and white BMP format two files, if found that the graphics have problems, but also need to use PHOTOSHOP to correct.

Fourth, the two BMP format files were converted to PROTEL format files, in PROTEL into two layers, if the two layers of PAD and VIA location of the basic coincidence, indicating that the first few steps to do a good job, if there is a bias, then repeat the third step, until it coincides with so far, the TOP layer of BMP into TOP.PCB, pay attention to the transformation of the layer to the SILK, that is, yellow! PCB, pay attention to convert to the SILK layer, that is, the yellow layer, and then you trace the line in the TOP layer is, and according to the second step of the drawing to place the device. After drawing the SILK layer will be deleted, and repeat to know all the layers drawn.

Fifth, in PROTEL will be TOP.PCB and BOT.PCB into, combined into a map on the OK. With a laser printer will be TOP LAYER, BOTTOM LAYER were printed on a transparent film (1:1 ratio), the film to that piece of PCB, compare whether there is a mistake, if it is correct, even if successful.

As electronic products are composed of various types of circuit boards to form the core control part of the work, therefore, the use of PCB copy board such a process, can be completed in any electronic product a full set of technical information extraction as well as product imitation and cloning.