Dual-Arduino I2C Temperature Display
Using Arduinos is great and all, but what happens when you run out of pins? Sure, you could buy a Mega, but what if you already have a few Unos, or maybe some Micros? There is a nifty protocol in electronics nowadays, and it's called Serial. Oh, you've heard of it? Well, Serial communication can...By: Frowney001
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[original story: Instructables]