The latest and greatest version of this board breaks out the ADC6 and ADC7 pins as well as adds footprints for optional I2C pull-up resistors!

Try this – the super-flat SparkFun Arduino Pro Mini, featuring a full 5V design running a ATMega328 at 16MHz. Mind you, there’s no headers and USB interface – you have to wire it up yourself, and have an offboard USB-serial cable to program it with!

Features

• ATmega328 running at 16MHz with external resonator (0.5% tolerance)
• USB connection off board
• Supports auto-reset
• 5V regulator
• 150mA maximum output
• Over current protected
• Reverse polarity protected
• DC input 5V up to 12V
• On board Power and Status LEDs
• 18x33mm (0.7″ x 1.3″) footprint
• Analog Pins: 8
• Digital I/Os: 14
• Weighs less than 2 grams! (0.07oz)

Note: Unlike most other Arduino development boards, this one has the USB connection off board.

Links

• Getting Started Tutorial