Teensy 2.0
The Teensy is a breadboard-friendly development board with loads of features in a, well, teensy package. The Teensy 2.0 breaks out all of the IO available on the ATMEGA32U4 to breadboard-friendly 0.1" spaced headers so you can hook up a load of peripherals. The Teensy 2.0 comes pre-flashed with a bootloader so you can program it using the on-board USB connection: No external programmer needed! You can program the Teensy in your favorite IDE using C or you can install the Teensyduino add-on for the Arduino IDE and write Arduino sketches for Teensy! Dimensions: 1.2" x 0.7" (30.5 x 17.8 mm) Features: - 8-Bit AVR Processor 16 MHz (ATMEGA32U4) - 31.5K Flash Memory, 2.5K RAM, 1K EEPROM - USB Can Emulate Any Type of Device - Single Pushbutton Programming - Arduino Compatible - 12 Analog Inputs - 25 Digital I/O Pins - 7 PWM outputs - SPI and I2C