Circuit Playground Bluefruit is our third board in the Circuit Playground series, another step towards a perfect introduction to electronics and programming. We've taken the popular Circuit Playground Express and made it even better! Now the main chip is an nRF52840 microcontroller which is not only more powerful, but also comes with Bluetooth Low Energy support for wireless connectivity.
Circuit Playground Bluefruit是Circuit Playground系列的第三款板，是邁向電子和程式設計完美入門的又一步。我們採用了流行的Circuit Playground Express，並使其變得更好！現在的主晶元是nRF52840微控制器，它不僅功能更強大，而且還具有低功耗藍牙支援無線連接。
The board is round and has alligator-clip pads around it so you don't have to solder or sew to make it work. You can power it from USB, a AAA battery pack, or with a Lipoly battery (for advanced users). Circuit Playground Bluefruit has built-in USB support. Built in USB means you plug it in to program it and it just shows up, no special cable or adapter required. Just program your code into the board then take it on the go!
該板是圓形的，周圍有鱷魚夾墊，因此您不必焊接或縫製即可使其工作。您可以使用USB，AAA電池組或Lipoly電池（適用於高級使用者）為其供電。Circuit Playground Bluefruit具有內置的USB支援。內置USB意味著您可以將其插入以進行程式設計，然後它就會顯示出來，而無需特殊的電纜或適配器。只需將您的代碼程式設計到開發板中，然後隨身攜帶即可！
You can use this board with Arduino or CircuitPython - It does not 
support MakeCode at this time (there is no ETA when it might be added) 您可以將此板與Arduino或CircuitPython一起使用 - 它目前不支援MakeCode（可能添加時沒有ETA）
Here's some of the great goodies baked in to each Circuit Playground Bluefruit:
- 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!
