Real Time Clock DS1307 RTC I2C Module AT24C32

The DS1307 Real Time Clock RTC I2C Module with AT24C32 gives an Arduino project an always-accurate, always-running clock that tracks the full calendar — year, month, date, day of week, hours, minutes, and seconds — through power interruptions by using a CR2032 coin cell battery to keep the DS1307 chip running independently of the Arduino power supply. This real time clock module is essential for any project where time matters across power cycles.

A data logger that needs to stamp each reading with the exact time it was recorded, an alarm system that triggers a buzzer or relay at a set time each day, an automated irrigation controller an attendance system that records the time each RFID card was tapped. The ds1307 real time clock module and the AT24C32 EEPROM on the same board share the I2C bus — the DS1307 chip has its own I2C address and the AT24C32 has a separate I2C address, so both are fully accessible from Arduino simultaneously using only the SDA and SCL pins already used for the clock.

The AT24C32’s 32Kbit EEPROM is useful for storing the timestamped data collected by the data logger directly on the module without needing an SD card or additional components. The real time clock module arduino connection requires just four wires and the RTClib library makes reading the current time a single line of code. This ds1307 rtc module is perfect for data logging alarm irrigation and electronics project. Available from StemVolt.

Related Product:

• Checkout RC522 RFID Reader/Writer Module 

Features:

• CR2032 battery backup keeps time running when Arduino has no power
• AT24C32 32Kbit EEPROM stores data that survives power-off cycles
• I2C interface — only SDA and SCL wires needed from Arduino
• 32.768kHz crystal provides accurate timekeeping without software timer drift

Technical Specifications:

Applications:

• Arduino clock display showing accurate time after power interruption
• ds1307 rtc data logger with timestamped sensor readings
• For real time clock module arduino alarm system demo
• ds1307 real time clock for I2C timekeeping protocol experiment

Package Includes:

• 1 x Real Time Clock DS1307 RTC I2C Module