Rotary encoders are the bee’s knees. Not only do you get absolute positioning, you can also use a rotary encoder ... Discussion. 11 Euros for an i2c rotary encoder. Pfff. But with a RGB LED!!

Rotary encoders are great devices. ... I joined the KY-040 encoder module with a KY-016 RGB LED. ... Push on the shaft of the encoder, and you can control the green level.

The new RSF MS 45 brings to market an exposed linear encoder that features an integrated status display with a multicolor LED to facilitate simple mounting as well as to allow for monitoring signal ...