The onboard microcontroller does the decoding, optionally some more processing, and sends byte-sized data to the main project board. The byte contains information about direction, push-button status and maybe even about average rotation speed (encoded in the higher bits). I think I will like it – if it works 😉
Quick and dirty application: Volume control knob for Amarok or kmix. All you need is a 5V USB-serial adapter and a little perl script that listens for data. Oh, and linux of course. Amarok’s volume is controlled using dbus calls. Very simple to do, actually. Part of the demo code for this little project!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
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