The CH34X family comprises widely used USB‑to‑serial chips manufactured by WCH (WinChipHead), commonly integrated into generic UNO R3, ESP8266, and ESP32 development boards.
The Lonely Binary Multimedia ESP32 Shield is equipped with two mechanical keys, each protected by a clear crystal shield. Below this shield lies an RGB LED powered by the WS2812 IC, which allows each LED to be individually controlled using just a single digital pin. These LEDs, popularly known as NeoPixels, are renowned for their vivid colors and versatility.
Each key is configured with a pull-down connection, ensuring that pressing a key causes the corresponding digital IO pin to register high. This makes for reliable input detection crucial for interactive projects.
Additionally, the shield includes a rotary encoder—an essential component for translating the rotation of a shaft or axle into digital or analog codes. This incremental rotary encoder emits signals with each rotation, enabling precise tracking of motion, direction, and position, which is ideal for projects that require detailed user input, such as an ESP32-based Bluetooth media center.
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