The Feather 32u4 Basic Proto has a prototyping area on board. Solder/attach a button or sensor directly on board and it is ready for quick prototyping. The Feather boards in 32u4 series are designed around ATmega32u4 – 3.3V logic supply and 8 MHz clock which is supported in the Arduino IDE and supported by a massive range of libraries. The Feather 32u4 boards are very easy to get going with Arduino IDE.
The Feather 32u4 boards boasts following features:
Dimensions: 51mm x 23mm x 8mm without headers soldered in
GPIO : 20 pins
USB support : Native support, with USB bootloader and serial port debugging
Comms : Hardware Serial, hardware I2C and hardware SPI support
PWM : 8 Pins
Analog inputs : 10
Battery charger : 100mA lipoly charge with status LED
The Adafruit Feather family are lightweight boards and designed to be a new standard for portable microcontroller cores. The Feather boards have
built in USB so it is capable for USB-to-Serial program and debug without dedicated FTDI like chip. One of the great feature of Feather boards is built in battery charging and a connector for 3.7V LiPoly batteries.
Get Adafruit Feather 32u4 Basic Proto from Pakronics :