battery-backed real time clock - soldering required
Warning: Last items in stock!
This 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, and works best with 5V-based chips such as the Arduino.
This breakout board is a kit and requires some light soldering which should only take about 15 minutes. Please check the documentation page for a list of parts and assembly instructions. Schematic and layout files are at GitHub
The DS1307 is simple and inexpensive but not a high precision device. It may lose or gain up to 2 seconds a day.