Circuit Playground features an ATmega32u4 processor.
The chip includes:
- 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)
- 1 x Sound sensor (MEMS microphone)
- 1 x Mini speaker (magnetic buzzer)
- 2 x Push buttons, left and right
- 1 x Slide switch
- 8 x alligator-clip friendly input/output pins
Includes I2C, UART, and 4 pins that can do analog inputs/PWM output
- All 8 pads can act as capacitive touch inputs
- Green "ON" LED so you know its powered
- Red "#13" LED for basic blinking
- Reset button
There is an in depth overview available on Adafruit.