Tiny RTC DS1307 I2C Real Time Clock Module | with AT24C32 32K EEPROM Storage
€4,50
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Tiny RTC DS1307 I2C Real Time Clock Module | with AT24C32 32K EEPROM Storage
€4,50
Shipping outside Spain costs an additional €1
Keep precise, non-volatile time tracking in your microcontrollers with the ultra-reliable Tiny RTC DS1307 Module!
The Tiny RTC DS1307 I2C Module is an essential hardware addition for any electronics project that requires accurate time-stamping, data logging, or scheduling. Powered by the popular DS1307 real-time clock chip, this module tracks seconds, minutes, hours, days, months, and years, adjusting automatically for leap years until the year 2100.
Equipped with a built-in CR1220 battery holder on the back, it guarantees that your system will maintain the current time even if your primary microcontroller loses power completely. Furthermore, it integrates an AT24C32 32Kbit EEPROM memory chip, offering non-volatile external storage to save user configurations, log event timings, or store system states safely.
It communicates seamlessly using standard 2-wire I2C protocol, making it plug-and-play compatible with Arduino, Raspberry Pi, ESP32, and PIC microcontrollers.
✨ Key Features
- Full Calendar & Clock Tracking: Manages hours (12/24-hour formats), minutes, seconds, date, month, and day of the week with leap-year compensation.
- Dual-Chip Functionality: Combines the DS1307 RTC clock with an AT24C32 32K EEPROM chip for additional on-board data logging space.
- Battery Backup Support: Integrated battery holder (for CR1220/LIR1220 cell) ensures continuous timekeeping during system brownouts or total power disconnection.
- I2C Daisy-Chain Friendly: Fully accessible via I2C interface, allowing you to link other sensors and modules on the same data bus without wasting controller pins.
⚙️ Technical Specifications
- RTC Controller IC: DS1307
- EEPROM Storage IC: AT24C32 (32K bits / 4K bytes capacity)
- Interface Protocol: I2C (Two-Wire Interface)
- Operating Voltage: DC 5V
- Battery Requirement: CR1220 or rechargeable LIR1220 coin battery (Battery not included)
- I2C Addresses: DS1307 (0x68 fixed) / AT24C32 (0x50 default, adjustable via onboard address pads)
🔌 Pinout Configuration (Onboard Silk Screen)
-
Main Headers (
P1&P2parallel pins):-
VCC: Power Supply Input (+5V) -
GND: Ground / Common Negative -
SDA: I2C Serial Data line -
SCL: I2C Serial Clock line -
DS: Output for DS18B20 temperature sensor option (optional onboard mod pad) -
SQ: Square Wave Output pin from DS1307 -
BAT: Battery input direct readout pin
-
🛠️ Common Applications
- Automated weather stations and environment data loggers.
- DIY digital clocks, retro nixie tube timers, and alarm systems.
- Scheduled industrial controllers (turning relays on/off at specific times of day).
- Smart home automation setups requiring standalone time verification without internet (NTP).