Signswise Incremental Optical Rotary Encoder for Arduino 600P/R Wide Voltage Power Supply DC 5-24V 6mm Shaft Quadrature

Learned this the hard way - Not always reliable on 5V. We use a lot of these, and we always do 12V nowadays. The nice part though, is that the output is (well...cant actually promise this) is open collector, so you can use a pull-up resistor to your controllers voltage, which might be 5V, and run your inputs like that while still powering it by 12V. Check your individual encoder though, because only god knows how the PCB inside is configured, or you..if you open it or measure the outputs on a meter.

Perfect for what I needed. As described A++++

but for other applications im sure its great;.

Love it. Should have picked up some of these years ago...will be bookmarking for the future.

No issues so far. Good price.

I am using this with an arduino DIY preamp as a volume control (of all things).

These have smooth effortless rotation, are seemingly precise and work as they were intended. Thumbs up. Make sure you us a pull-up resistor to signal terminals.

I used the example code in the questions/answers section of this page, and the arduino was missing pulses. Sometimes the counts would sporadically go backwards. Slow revolutions would give hundreds of counts per revolution, but fast revolutions would give 30 counts.

This thing has no business being this good at this price. Smooth operation - 1440 pules per rev in standard quadrature configuration (2 phase). M3-.5 screws fit the mounting flange. Im feeding this thing 5 volts straight from USB, two encoders and a Teensy board drawing just .3 watts - whats to complain about.

Great product