Design with DS1307 RTC (Wokwi Compatible) in Cirkit DesignerThe DS1307 RTC (Real-Time Clock) is a low-power, full binary-coded decimal (BCD) clock/calendar with 56 bytes of NV SRAM. It communicates with a microcontroller via the I2C protocol and is used to keep track of time even when the main device is powered off. The Wokwi Compatible version is designed for easy integration with the Wokwi simulation platform.
This circuit interfaces an Arduino UNO with a DS1307 Real-Time Clock (RTC) module. The Arduino communicates with the RTC module using the I2C protocol, with connections from A4 to SDA and A5 to SCL.
Open Project in Cirkit Designer
This circuit features an Arduino UNO connected to a DS1307 Real Time Clock (RTC) module for timekeeping and a red LED with a series resistor for indication purposes. The Arduino communicates with the RTC via I2C (using A4 and A5 pins for SDA and SCL, respectively), and controls the LED connected to digital pin D8 through a 330-ohm resistor. The embedded code sets the RTC time, checks the current time, and turns the LED on or off based on the specified time condition (between 11:00 AM and 11:43 AM).
Open Project in Cirkit Designer
This circuit is an Arduino-based real-time clock and display system. It uses an Arduino UNO to interface with a DS1307 RTC module for timekeeping and a 20x4 I2C LCD to display the current time and date. Additionally, a PCF8574 IO Expansion Board is used to extend the I2C bus for additional I/O operations.
Open Project in Cirkit Designer
This circuit consists of an Arduino UNO microcontroller connected to a DS1307 Real Time Clock (RTC) module and a servo motor. The RTC module communicates with the Arduino via the I2C protocol using SDA and SCL lines, while the servo is controlled by a PWM signal from the Arduino. The circuit is designed to use the precise timekeeping of the RTC to schedule and execute movements with the servo motor.
Open Project in Cirkit Designer| Parameter | Value |
|---|---|
| Operating Voltage | 4.5V to 5.5V |
| Operating Current | 1.5mA (typical) |
| Timekeeping Current | 500nA (typical) |
| Interface | I2C (2-wire) |
| Clock Accuracy | ±2ppm from 0°C to +40°C |
| NV SRAM | 56 bytes |
| Temperature Range | -40°C to +85°C |
| Pin | Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | VCC | Power Supply (4.5V to 5.5V) |
| 3 | SCL | Serial Clock Line (I2C) |
| 4 | SDA | Serial Data Line (I2C) |
| 5 | SQW/OUT | Square Wave/Output Driver (Open Drain) |
| 6 | NC | No Connection |
| 7 | NC | No Connection |
| 8 | VBAT | Battery Backup Input (3V Lithium Cell) |
#include <Wire.h>
#include <RTClib.h>
RTC_DS1307 rtc;
void setup() {
Serial.begin(9600);
Wire.begin();
rtc.begin();
if (!rtc.isrunning()) {
Serial.println("RTC is NOT running!");
// Set the RTC to the date & time this sketch was compiled
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
}
}
void loop() {
DateTime now = rtc.now();
Serial.print(now.year(), DEC);
Serial.print('/');
Serial.print(now.month(), DEC);
Serial.print('/');
Serial.print(now.day(), DEC);
Serial.print(" ");
Serial.print(now.hour(), DEC);
Serial.print(':');
Serial.print(now.minute(), DEC);
Serial.print(':');
Serial.print(now.second(), DEC);
Serial.println();
delay(1000);
}
rtc.adjust() function.By following this documentation, users should be able to effectively integrate and utilize the DS1307 RTC in their projects, ensuring accurate timekeeping and reliable performance.