Arduino-Breakout-&-Prototyping-Boards-Velleman-KA07-p-The-KA07-Real-Time-Clock-RTC-from-b-Velleman-b-adds-a-RTC-functionality-to-Arduino-projects-removing-clock-requirements-from-the-microcontroller-&-ensuring-the-accurate-&-easy-counting-of-seconds-minutes-hours-date-of-month-day-of-the-week-year-&-leap-year-Additional-features-of-this-easy-to-assemble-kit-include-high-accuracy-low-power-consumption-&-backup-battery-holder-br-br-The-KA07-library-modified-to