Like all my other projects, this project will, of course, be available on GitHub and be open source, so you can do with it as you wish make one, sell one, or use the design to add USB isolation to your own project.įor this project, I’m back to using my open source Altium Library, so there are no included library files in this project’s GitHub repository, as has been the case in my previous projects. This should be a fairly simple article discussing a fairly simple build, but if you’re anything like me and you tend to break things in new and creative ways when working on projects, I feel as though you might find this useful. So in this article, I’m going to make my dream of having a USB port isolation device come true-it’s certainly long overdue. You can readily buy digital isolator ICs that handle USB 2.0 full speed, and you can also buy isolated power supplies that output the same voltage they run off of. That being said, for the past two years, I’ve had the idea of just building my own USB isolator. Eventually, you get to the point where you’re looking at having to get a new motherboard, and end up realizing those devices are probably worth the money in the long run. It always seemed too expensive.until the next USB port died. I’ve seen USB isolation devices on the market which solve precisely these sorts of problems (developers doing bad with their devices), however, I never really got around to buying one. Simply shorting dozens of volts across the port just kills them dead-and there are so many other creative ways to destroy USB functionality on a motherboard! While working heavily with microcontroller projects in the past, I learned that computer USB ports can be fragile things.
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