Spec

• Arduino-compatible board with ATmega32U4 running at 3.3 V/8 MHz. Equipped with 9 10 bit A/D converters, 5 PWM pins, 12 DIO and Rx/Tx for serial connection. It's similar to the Pro Mini except that it ***s the ATmega32U4.
• [Note]
• *It is equipped with a voltage regulator so that a maximum voltage of 12 V can be applied, but if unadjusted power is to be supplied, connect it to the RAW pin instead of the VCC.
• *It operates at 3.3 volts, making it easy to *** a typical 3.3 volt sensor, but keep in mind the system voltage limitations.
• Specifications • ATMega32U4 operating at 3.3 V/8 MHz
• Supported in Arduino IDE v1.0.1
• MicroUSB connector for programming
• 9 10 bit A/D converters
• Digital I/O x 12 (5 PWM compatible)
• Serial connection via Rx/Tx
• Size: 33 x 17.8 mm
• [Reference]
• Schematic
• Eagle Files
• Hookup Guide
• Graphical Datasheet
• Datasheet (ATMega 32U4)
• Firmware Note
• Arduino Addon Files
• Arduino Addon Files (IDE 1.5+)
• GitHub (Design Files)