Core2duino Updated with Arduino

This instructable will show you how to build an Arduino shield that adds another Atmega168/328 on top of your Arduino, giving you an extra complete set of I/O pins to use. That’s 12 PWM pins, 12 Analog pins, 4 external interrupts,  or 40 Digital pins total. ———————————– *UPDATE* 3-11-10 I re-did the Eagle file and scrapped …

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