The Scroll Unit is a rotary encoder expansion module designed as a scroll wheel. It combines a 12-pulse through-shaft encoder, a button input, and a WS2812C programmable RGB LED. The built-in STM32F030 microcontroller handles encoder pulse signal acquisition with integrated firmware, allowing you to easily access encoder values through I2C read operations, making the process much simpler. This unit is perfect for projects such as adjusting scale values or controlling volume. Features * Based on STM32 microcontroller * AB phase output (12 pulses per revolution) * Built-in button * Multi-color WS2812C RGB LED indicator * I2C communication interface Specifications MCU STM32F030F4P6@32-bit ARM Cortex-M0 processor Rotary Encoder EC10E Rotary Encoder Output AB two-phase quadrature output Rotary Encoder Pulses 12 pulses/revolution RGB LED 1x WS2812C Button 1x Button I2C Communication Address 0x40 Operating Temperature 0-40°C Product Size 32 x 24 x 18.9mm Package Size 136 x 92 x 20mm Product Weight 7.3g Package Weight 12.7g Resources * Product Wiki Package Contents * 1x Scroll Unit * 1x HY2.0 4-pin Grove cable (20cm) https://elecena.pl/product/26868811/scroll-unit-with-hollow-shaft-encoder-ec10e1220501 2024-09-02 https://elecena.pl/product/26868811/scroll-unit-with-hollow-shaft-encoder-ec10e1220501 2024-09-18 https://elecena.pl/product/26868811/scroll-unit-with-hollow-shaft-encoder-ec10e1220501 2024-11-29 https://elecena.pl/product/26868811/scroll-unit-with-hollow-shaft-encoder-ec10e1220501 2024-11-30 https://elecena.pl/product/26868811/scroll-unit-with-hollow-shaft-encoder-ec10e1220501 2025-04-29 https://elecena.pl/product/26868811/scroll-unit-with-hollow-shaft-encoder-ec10e1220501 2025-08-06 https://elecena.pl/product/26868811/scroll-unit-with-hollow-shaft-encoder-ec10e1220501 2025-11-28 https://elecena.pl/product/26868811/scroll-unit-with-hollow-shaft-encoder-ec10e1220501 2025-11-29