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A number of web sites talk about H-bridges, they are a topic of great discussion in robotics clubs and they are the bane of many robotics hobbyists. I periodically chime in on discussions about them, and while not an expert by a long shot I’ve built a few over the years. Further, they were one of my personal stumbling blocks when I was first getting into robotics. This section of the notebook is devoted to the theory and practice of building H-bridges for controlling brushed DC motors (the most common kind you will find in hobby robotics …) I’ve got an image of one below with both as a unit and “expanded” in an exploded view.
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