RTC Real Time Clock DS1307 I2C IIC Module for Arduino

Description

The RTC Real Time Clock DS1307 I2C IIC Module for Arduino is a high-grade, precision-tested electronic component designed for reliable performance in prototyping, education, industrial control, and custom hardware engineering.

🔹 Key Features

• •[Clock Module, Sensors] This is Tiny RTC Real Time Clock DS1307 I2C IIC Module for Arduino
• •It contains a DS1307 real-time clock IC with a backup battery
• •It’s one of the easiest to use RTCs out there, with Arduino and other libraries or simply use I2C commands to set and retrieve the time and date
• •Includes a lithium coin cell battery which should be good for four years at least
• •Along with the DS1307 real-time clock, the module also has an Atmel 24C32 EEPROM chip which is handy for storing data without worrying about power loss
• •There is also space on the board to solder your own DS18B20 temperature sensor

🔹 Pin Configuration & Wiring

Interactive Silicon Pinout & GPIO Mapping

ESP32 DevKitArduino Uno

All PinsI2C / SPI / UARTADC AnalogDigital GPIOPower & GND

5V3.3VPin 13 (SCK)Pin 11 (MOSI)Pin 9 (PWM)Pin A0Pin A4 (SDA)Pin A5 (SCL)

COMM PIN

Pin 13 (SCK)

Electrical Limit: 5.0V Max

Board Logic

5V Logic (7-12V VIN)

Mapped Silicon Functions

SPI SCK (Clock)Built-in 'L' LED

Hardware Engineering Note

Connected directly to onboard yellow LED and SPI hardware clock bus.

Arduino / C++ Quick CodeReady to flash

pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);

Verified Genuine Silicon Layout100% Physical Pin Match

🔹 Applications

This component is engineered and suitable for:

• •Microcontroller interfacing (Arduino, ESP32, Raspberry Pi, STM32)
• •IoT telemetry, environmental monitoring, and smart home systems
• •Robotics navigation, obstacle detection, and motion sensing
• •STEM education, university electronics labs, and maker prototyping

🔹 Package Includes

• ✓1 × RTC Real Time Clock DS1307 I2C IIC Module for Arduino