How and Why to Add a Real Time Clock to Arduino

Keeping time on Arduino projects isn’t as easy as you might think: once the computer connection isn’t there, your unpowered Arduino simply stops running, including its internal ticker. In order to keep your Arduino in sync with the world around it, you’re going to need what’s called a “Real Time Clock module”. Here’s how use one. What’s the point of a Real Time Clock (RTC)? Your computer most likely syncs its time with the internet, but it still has an internal clock that keeps going even without an Internet connection or the power is turned off. When you use an...

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