SparkFun RedBoard Turbo -SAMD21 Development Board (Qwiic)

Key Features: An economical and easy to use development platform if you're needing more power than the classic RedBoard ATSAMD21G18 32-bit/48MHz ARM Cortex-M0+ Analog-to-Digital and Digital-to-Analog Converters (ADC & DAC) Qwiic Connector The SparkFun RedBoard Turbo has been equipped with a USB interface for programming and power, a Qwiic connector, an RTC crystal, WS2812-based addressable RGB LED, 600mA 3.3V regulator, and a variety of other components. To power the RedBoard Turbo, just plug it into a USB port on your computer via the micro-B port or directly into the wall with the 5V tolerant barrel jack. The SparkFun RedBoard Turbo is also equipped with a LiPo Battery connector (for a single-cell 3.7-4.2V litium-polymer battery). The MCP73831's charge current is configured by a resistor value between 66kΩ and 2kΩ, to charge the battery at a rate between 15mA and 500mA, respectively. By default, the board is configured to charge the battery at around 250mA. The board layout meets