This project is a DIY simple optical rotary encoder with 180 points per rotation and bi directional detection that you can make at home with a 3D printer. This Arduino Rotary Encoder is intended to ...

byte enc1oldPins = 0; // will hold state of pins last time encoder was read byte enc2oldPins = 0; byte enc1newPins = 0; // will hold new encoder pin reading, to be compared with last time's pin states ...

The Arduino shows up as 2 devices, a digital joystick+12 buttons with added wheel+dial and a mouse that moves the x/y axes by rotating the spinner. This works nicely with Mister and was tested on ...

Taste The Code. How to Use Rotary Encoders and Interrupts With Your Arduino Projects. Posted: June 10, 2025 | Last updated: July 10, 2025. Hi, I'm Bill.

I needed a rotary encoder — I pulled a cheap one out of one of those “49 boards for Arduino” kits you see around. Not the finest encoder in the land, I’m sure, but it should do the job.