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

MicroPython

Adafruit no longer supports MicroPython on its boards. Use CircuitPython for official support.

• What is MicroPython?

MicroPython is a complete re-write of the Python (version 3.4) programming language so that it fits and runs on a microcontroller. It includes many optimizations so that it runs efficiently and uses very little RAM.

CircuitPython

Adafruit recommends using Mu Editor to program in CircuitPython

• What is CircuitPython?
• CircuitPython on the CPB
• CircuitPython Made Easy

Projects

• Automatic Bicycle Brake Light
• Light-up Tone Piano

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