Udev Rules Linux: Ensure USB (and other) Devices Always Keep Same Port! Changing port names (/dev/ttyUSB0.../dev/ttyUSB1.../dev/ttyAMA0...etc) are annoying and waste valuable time. Fortunately, it's a problem that is easy enough to fix. Viewer/Reader Q&A: What type of power supply did you use in Practical Robotics in C++? If you mean the source/battery, I used a 14.4 volt power tool battery that I had several of. Any would do, but this one is just like it (link to off-brand of the same type). https://amzn.to/3I22Tgw I just used spade connectors, but an adapter like this would be a more elegant way to tap the power https://amzn.to/3WKsX3G If you mean the voltage converter I used to power the Raspberry Pi and sensors, it was this DC to DC converter that steps 14.4 volts down to 5 volts and has a convenient USB connector. https://amzn.to/3Wrr3Fu ###################################################### Help a guy make more tutorials with a cup of coffee, by picking up a copy of Practical Robotics in C++, or by buying one of my favorite robot sensors I have listed below. Thank you for your support! https://www.buymeacoffee.com/practicalrobot Practical Robotics in C++: https://amzn.to/3CJAqHs LD19 lidar - my new favorite 2d Lidar: https://amzn.to/3yQO6Ak RPLidar - tried and true 2d Lidar: https://amzn.to/3tgIz3g GPSV5 - Best inexpensive GPS I've used: https://amzn.to/3Rh1Zin GPS-RTK2 - accuracy of 2cm instead of 2 meters! : https://amzn.to/3IDpnCV Realsense Depth Camera - Outstanding little camera: https://amzn.to/3OUfMtC As an Amazon Associate I earn from qualifying purchases.