1  ---
 2  layout: download
 3  board_id: "circuitplayground_bluefruit"
 4  title: "Circuit Playground Bluefruit Download"
 5  name: "Circuit Playground Bluefruit"
 6  manufacturer: "Adafruit"
 7  board_url: ""
 8  board_image: "circuitplayground_bluefruit.jpg"
 9  features:
10    - Speaker
11    - Solder-free Alligator Cip
12    - Bluetooth/BTLE
13  ---
14  
15  **Circuit Playground Bluefruit** is our third board in the Circuit Playground series,
16    another step towards a perfect introduction to electronics and programming. We've
17    taken the popular Circuit Playground Express and made it even better! Now the main
18    chip is an nRF52840 microcontroller which is not only more powerful, but also comes
19    with Bluetooth Low Energy support for wireless connectivity.
20  
21  This product is ALPHA hardware at this time, for use by folks who are going to be
22  developing software to support it - it's not quite ready for student/beginner use!
23  
24  The board is round and has alligator-clip pads around it so you don't have to solder
25  or sew to make it work. You can power it from USB, a AAA battery pack, or with a
26  Lipoly battery (for advanced users). Circuit Playground Bluefruit has built-in USB
27  support. Built in USB means you plug it in to program it and it just shows up, no
28  special cable or adapter required. Just program your code into the board then take it
29  on the go!
30  
31  **Features:**
32  
33  * 1 x nRF52840 Cortex M4 processor with Bluetooth Low Energy support
34  * 10 x mini NeoPixels, each one can display any color
35  * 1 x Motion sensor (LIS3DH triple-axis accelerometer with tap detection, free-fall detection)
36  * 1 x Temperature sensor (thermistor)
37  * 1 x Light sensor (phototransistor). Can also act as a color sensor and pulse sensor.
38  * 1 x Sound sensor (MEMS microphone)
39  * 1 x Mini speaker with class D amplifier (7.5mm magnetic speaker/buzzer)
40  * 2 x Push buttons, labeled A and B
41  * 1 x Slide switch
42  * 8 x alligator-clip friendly input/output pins
43  * Includes I2C, UART, 6 pins that can do analog inputs, multiple PWM outputs
44  * Green "ON" LED so you know its powered
45  * Red "#13" LED for basic blinking
46  * Reset button
47  * 2 MB of SPI Flash storage, used primarily with CircuitPython to store code and libraries.
48  * MicroUSB port for programming and debugging
49  * USB port can act like serial port, keyboard, mouse, joystick or MIDI!
50  
51  ## Purchase
52  * [Adafruit](https://www.adafruit.com/product/4333)
53  
54  ## Contribute
55  
56  Have some info to add for this board? Edit the source for this page [here](https://github.com/adafruit/circuitpython-org/edit/master/_board/{{ page.board_id }}.md).