A simple and compact USB-powered voltage regulator designed to replace 2×AA or 2×AAA batteries when powering 3V devices. Good for book nooks, LED decorations, small electronics, and other low-power battery-operated projects.
This board converts standard 5V USB power (or other DC input up to 7V) down to a stable 3V output using a spare LM317 regulator module, allowing devices normally powered by batteries to run continuously without battery replacements.
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- 3.25VDC unloaded output, 2.9VDC loaded.
- 1R 1W series resistor.
- Initial release.
Educational Use Notice: This project is provided for educational and learning purposes only. You are welcome to read, study, and experiment with this software and/or hardware. It is not intended for commercial use. This software and/or hardware is provided "as is", without warranty of any kind. The author assumes no responsibility for any damages or issues resulting from its use.