Sony Spresense Extension Board (China)

Sony Spresense Extension Board adds additional hardware connectivity and additional features to the Sony Spresense Main Board. The Spresense Main Board offers Arduino Uno-compatible headers, enabling the use of most Arduino shield boards. The Spresense Extension Board also includes a micro-SD card slot, a 3.5mm 3-pole headphone jack, and an extra USB port. Jumper options are available to adjust hardware options, such as changing the GPIO voltage to 5.0V or 3.3V or enabling/disabling UART2. Mic connector pins are also provided to support up to four analog or eight digital microphones.