# Making a 9-bit absolute encoder Gray code wheel with Arduino Uno

- Source: Reddit r/robotics
- Published: 2026-10-20T19:58:58.000Z
- RoboHot: https://robohot.news/en/items/ts7a9m8rd74g4ukqv20uh0asf
- Original: https://www.reddit.com/r/robotics/comments/1xb2h9a/trabalho_universit%C3%A1rio/

## Summary

A mechatronics engineering student plans to build a 9-bit absolute encoder with an Arduino Uno, aiming to cover 360 degrees with one position per degree using Gray code. A 9-bit Gray code yields 512 states; he is unsure how to map these to 360 degrees and is also struggling to find a 3D model of a 9-bit Gray code wheel, so he is asking for help on Reddit r/robotics.