Circuit Playground Bluefruit

Adafruit's Circuit Playground Bluefruit

Third gen version of Adafruit's popular circular MCU

Description

• The main chip is an nRF52840, with Bluetooth Low Energy
• Outer Diameter: ~50.6mm / ~2.0"
• Weight: 8.9g

Features

• 1 x nRF52840 Cortex M4 processor with Bluetooth Low Energy support
• 10 x mini NeoPixels, each one can display any color
• 1 x Motion sensor (LIS3DH triple-axis accelerometer with tap detection, free-fall detection)
• 1 x Temperature sensor (thermistor)
• 1 x Light sensor (phototransistor). Can also act as a color sensor and pulse sensor.
• 1 x Sound sensor (MEMS microphone)
• 1 x Mini speaker with class D amplifier (7.5mm magnetic speaker/buzzer)
• 2 x Push buttons, labeled A and B
• 1 x Slide switch
• 8 x alligator-clip friendly input/output pins
• Includes I2C, UART, 6 pins that can do analog inputs, multiple PWM outputs
• Green "ON" LED so you know its powered
• Red "#13" LED for basic blinking
• Reset button
• 2 MB of SPI Flash storage, used primarily with CircuitPython to store code and libraries.
• MicroUSB port for programming and debugging
• USB port can act like serial port, keyboard, mouse, joystick or MIDI

Pinouts

Software

Arduino IDE

Set up Arduino support on CPB

CircuitPython

• What is CircuitPython?
• CircuitPython on the CPB

Projects

• Automatic Bicycle Brake Light
• Light-up Tone Piano

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