RTC module with DS1302

The DS1302 is an extremely useful real-time clock circuit that lets you read the clock either as a single reading or continuously. The module includes a holder for a CR2032 battery, which keeps the clock running even when the main power supply is not available.

The DS1302 chip keeps track of seconds, minutes, hours, days, months and years without interruption. The data is sent out through the SCLK pin, which makes this RTC easy to use with many development systems, and with the Arduino platform in particular.

• RST: Reset (must be HIGH for active mode / Active High)

• Data logging systems: to record data with accurate timestamps.
• Home automation systems: to control timed events such as lights and heating.
• Portable devices: where keeping the time matters even with no main power supply.
• Measuring and control instruments: where an accurate clock is needed for the work in hand.

• DS1302 datasheet
• DS1302 RTC library for Arduino