# Example for `TDA74xx` driver The datasheet can be found at: * [TDA7440](https://www.st.com/resource/en/datasheet/tda7440.pdf) * [TDA7439DS](https://www.st.com/resource/en/datasheet/tda7439ds.pdf) ## What it does The example configures a `TDA74xx`. It changes output volume in a loop. ## Wiring Connect `SCL` and `SDA` pins to the following pins with appropriate pull-up resistors. | Name | Description | Defaults | |------|-------------|----------| | `CONFIG_EXAMPLE_I2C_MASTER_SCL` | GPIO number for `SCL` | "5" for `esp8266`, "6" for `esp32c3`, "19" for `esp32`, `esp32s2`, and `esp32s3` | | `CONFIG_EXAMPLE_I2C_MASTER_SDA` | GPIO number for `SDA` | "4" for `esp8266`, "5" for `esp32c3`, "18" for `esp32`, `esp32s2`, and `esp32s3` | Additionally, you need audio input on a channel (`0` by default).
To create a project from this example, run:
idf.py create-project-from-example "esp-idf-lib/tda74xx=1.0.5:default"