<p>Scroll unit is a rotary encoder expansion unit in the form of a scroll wheel. It integrates a 12-pulse through-shaft encoder + button input + WS2812C programmable RGB LED.</p> <p>The built-in STM32F030 microcontroller integrates encoder pulse signal acquisition firmware, allowing users to directly obtain encoder values through I2C reading operations, simplifying complex processes.</p> <p>It is suitable for control scenarios such as scale value control and volume adjustment.</p> <p>Colour:White \u0026 Red</p> <p>Material:plastic</p> <p>Specifications:</p> <p>1.Based on STM32 microcontroller</p> <p>2.AB phase output (12 pulses per revolution)</p> <p>3.Built-in button</p> <p>4.Multi-color WS2812C RGB LED indicator</p> <p>5.I2C communication interface</p> <p>Applications:</p> <p>1.Industrial Automation</p> <p>2.Smart Home</p> <p>3.Robotics</p> <p>4.Human-Computer Interaction</p> <p>Due to different batches, there may be differences in product appearance and printed text, which will not affect use</p> <p>Package Contents:</p> <p>1 x Scroll Unit</p> <p>1 x HY2.0-4P Grove cable(Cable color random, don't accept the specified color)</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>