Adafruit DS1307 Real Time Clock Assembled Breakout Board Category_Radio & Wireless/RF * Operating temperature: -20 to

* Operating temperature: -20 to 60° C

It's a truly flexible logger

9 W @ 5 VDC for +25 dBm out

each one turned on or off by the controller chip

no matter a darker object

Adafruit DS1307 Real Time Clock Assembled Breakout Board Category_Radio & Wireless/RF * Operating temperature: -20 toThis is a great battery backed real time clock (RTC) that allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. Perfect for datalogging, clock building, time stamping, timers and alarms, etc. The DS1307 is the most popular RTC but it requires 5V power to work (although we've used it with 5V power and 3. 3V logic successfully) Works great with an Arduino using our RTC library or with a Raspberry