Any time you want to know what time it is. If I have missed the dating, or if it is the mealtime for my three months child. The RTC module can provide you a real-time clock. You can make the controller to ask the module: hi,buddy, what time it is. At the same time, Donot forget to install a small coin cell which can serve you for more than six mouths.
Real-Time Clock (RTC) Counts Seconds,Minutes, Hours, Date of the Month, Month,Day of the week, and Year with Leap-Year Compensatio
Low power consumption
Xadow is a though small but perfectly formed Arduino(TM) compatible board series containing several modules. It's a kit extremely suitable for space-sensitive projects such as wearable devices & arts designs, which have higher request on size, weight and flexible cascade connection.
You can find more modules here
Please visit our wiki
page for more info about this product. It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to Seeed Studio'sforum