This is a 3-wire DS1302 RTC (Real Time Clock) library for Arduino.

After connection, edit the DS1302_settime.ino with the current time and quickly upload it. Then explore the other sketches to make stuff work with 'current time' as set by previous. After connections ...

A small, DS1302-based Real-time Clock (RTC) module with on-board, 20-ppm oscillator. This is a small DS1302 PCB with on-board oscillator. This means that if you need a real-time clock (RTC) you don't ...