This shield makes it easy to add a 'hard disk' with gigabytes of storage to your Arduino! The latest version of this popular shield has all the features of the popular original, and is "R3" compatible so you can use it with just about any Arduino or compatible. You can be up and running with it in less than 15 minutes - saving data to files on any FAT16 or FAT32 formatted SD card, to be read by any plotting, spreadsheet or analysis program. The included RTC (Real Time Clock) can be used to timestamp all your data with the current time, so that you know precisely what happened when! The data logger is a reliable, well-rounded and versatile design. It is easily expanded or modified and come well supported with online documentation and libraries