XIAO nRF52840 Sense – Tiny BLE MCU with IMU and Microphone

A tiny wireless development board built for Bluetooth, wearable, sensor, and TinyML projects. It combines the Nordic nRF52840 MCU with an onboard 6-axis IMU and PDM microphone. Features: Nordic nRF52840 ARM Cortex-M4 processor Runs up to 64MHz Bluetooth Low Energy 5.4 Supports Bluetooth Mesh and NFC 256KB RAM 1MB internal Flash 2MB onboard QSPI Flash Built-in 6-axis IMU Built-in PDM digital microphone 11 GPIO pins with PWM 6 ADC inputs Supports I2C, SPI, UART, NFC, and SWD Built-in lithium battery charging Low standby current below 5µA Compact size: 21 × 17.8mm Applications: TinyML projects Gesture recognition Voice and sound sensing Wearable electronics Bluetooth devices Motion tracking Wireless sensors Arduino projects Battery-powered devices