This library features a variety of blinken effects for the WS2811/WS2812/NeoPixel LEDs. It is meant to be a drop-in replacement for the Adafruit NeoPixel library with additional features. You can search for WS2812FX in the Arduino IDE Library Manager or install the latest (or development) version manually. More complex effects can be created by dividing your string of LEDs into segments (up to ten) and programming each segment independently. Use the segment() function to program each...
This project provides an AVR-based, USB accessible, single-axis motion controller that can fit into an USB-connector completely and therefore is probably the worlds smallest stepper motor controller. Here both, hardware schematics and all software components are provided.