- Published: Saturday, 02 February 2013
- Written by Jon Chandler
Sometimes it may be desirable to create a PCB footprint from an existing PCB, perhaps when a part is salvaged from a board or detailed dimensions aren't available. Measuring the pattern on an existing board using a digital caliper is possible but is tedious and is subject to errors. This method is adapted from an article on Hack-A-Day: Reverse engineering salvaged part footprints. I show a method to accomplish this technique using Infanview, a image manipulation program I highly recommend.
The first step is to take a high-resolution picture showing the footprint in question. This may be done using the macro setting on a camera or using a microscope camera depending on the size of the footprint. If the board is bare, a standard flatbed scanner may be used to create a great image. When taking the picture, the camera should be parallel with the board to prevent a skewed image. For this article, I'll be using a scanned image of my PCD demo board. The resolution of this picture is about 1200 pixels by 1200 pixels.Discuss this article in the forums (5 replies).