DS3231 High Precision Real Time Clock (RTC) with battery

DS3231 RTC Breakout – Real Time Clock (RTC) Breakout Module The DS3231 RTC Module is a high-accuracy real-time clock module designed to maintain the current time and date for embedded systems, microcontrollers, and digital electronics projects. It uses the RTC IC and communicates with the host controller through the I²C interface, requiring only two communication lines, SDA and SCL. The module can track seconds, minutes, hours, day, date, month, and year, including automatic adjustment for leap years. A backup coin-cell battery allows the module to continue maintaining time when the main power supply is disconnected. It’s also includes temperature-compensated timing circuitry for improved accuracy compared with basic RTC modules, making it useful for clocks, data loggers, timers, scheduling systems, automation projects, and devices that need reliable timekeeping. Features : Real-time clock tracks seconds, minutes, hours, day, date, month, and year Leap-year compensation valid up to 2100 Accuracy: ±2ppm (0°C to +40°C), ±3.5ppm (-40°C to +85°C) Battery backup for uninterrupted timekeeping I2C interface Two programmable time-of-day alarms Programmable square-wave output Low power consumption Operating voltage: 2.3V to 5.5V Specifications : Parameter Specification RTC IC DS3231 Interface I²C Communication Lines SDA, SCL Time Format 12-hour / 24-hour Timekeeping Seconds, Minutes, Hours, Day, Date, Month, Year Backup Battery Coin-cell battery Calendar Automatic leap-year compensation Accuracy High-accuracy temperature-compensated RTC Operating Temperature -40°C to +85°C Module Type RTC Real-Time Clock Module Pinout : Applications: Arduino clock projects. Raspberry Pi projects. ESP32 and ESP8266 projects. Digital clocks and calendars. Data logging systems. Timers and scheduling systems. Automation and control systems. Industrial monitoring equipment. Access-control systems. Embedded systems requiring accurate timekeeping. Packages Included: 1x DS3231 RTC (Real Time Clock) Module. Datasheet : DS3231

This is high precision real time clock by Adafruit based on the DS3231 IC made by Maxim Integrated. The datasheet of the DS3231 describe it as Extremely Accurate I2C-Integrated RTC/TCXO/Crystal and “it does exactly what it says on the tin! This Real Time Clock (RTC) is the most precise you can get in a small, low power package” as claimed by Adafruit. without battery The reason for the high accuracy of this real time clock is explained as follows : “Most RTCs use an external 32kHz timing crystal that is used to keep time with low current draw. And that's all well and good, but those crystals have slight drift, particularly when the temperature changes (the temperature changes the oscillation frequency very very very slightly but it does add up!) The crystal of this RTC (DS3231) is inside the chip! And right next to the integrated crystal is a temperature sensor. That sensor compensates for the frequency changes by adding or removing clock ticks so that the timekeeping stays on schedule”. This is the finest RTC you can get, and now we have it in a compact, breadboard-friendly breakout. With a coin cell plugged into the back, you can get years of precision timekeeping, even when main power is lost. Great for datalogging and clocks, or anything where you need to really know the time. Specifications • Complete the clock calendar function including the second, minute, time, week, date, month, and year • + 2.3 V to + 5.5 V power supply voltage • - 40 ℃ to + 85℃ temperature range • Low power consumption DS3231 Datasheet. Detailed tutorial from Adafruit including arduino connection and code Detailed tutorial from including arduino connection and code in pdf format.

DS3231 RTC Module Precise Real Time Clock I2C AT24C32 (Battery Not Included ) DS3231 RTC is a Precise Real-Time Clock Module with 32Kbit EEPROM and a built-in 10-bit temperature sensor having a resolution of 0.25C. The DS3231 RTC module Precise Real-Time Clock Module is a low-cost, extremely accurate I²C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input and maintains accurate timekeeping when the main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The ds3231 Arduino is available in commercial and industrial temperature ranges and is offered in a 16-pin, 300-mil SO package. For more details about the IC, the DS 3231 datasheet is attached. Features: Two Time-of-Day Alarms. Digital Temp Sensor Output. Register for Aging Trim. DS 3231 RTC with 2032 Battery Holder. Highly Accurate RTC Completely Manages All Timekeeping Functions. Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year, with Leap-Year Compensation Valid Up to 2100. Configurable I2C device Address for AT24C32 using SMD jumpers on PCB (A0, A1, A2). Programmable Square-Wave Output Signal. Battery-Backup Input for Continuous Timekeeping. Low Power Operation Extends Battery-Backup Run Time. Package Includes : 1 x DS3231 Precise Real-Time Clock Module Memory Module (Battery Not Included) Operating Voltage (VDC) 2.7 ~ 5.5 Voltage Supply for RTC 2.2 V ~ 5.5 V Accuracy ±2ppm from 0°C to 40°C. ±3.5ppm from -40°C to 85°C. Battery Holder 2032 Coin Battery.(Battery Not Included) I2C interface Fast (400kHz) I2C Interface. EEPROM AT24C32 32Kbit Serial I2C. Time and Date Format Time: HH: MM: SS (12/24 hr). Date Format: YY-MM-DD-dd. Operating Temperature Range (°C) -40 to 85 Digital Temp Sensor Output 10 bit, ±3°C Accuracy and 0.25C resolution. Dimensions in mm (LxWxH) 38 x 22 x 14 Weight(gm) 8 Shipment Weight 0.012 kg Shipment Dimensions 12 × 8 × 5 cm DS3231 RTC DATASHEET. AT24C32 32K BIT EEPROM DATASHEET. ARDUINO LIBRARY BY MAJICDESIGNS ARDUINO LIBRARY BY ADAFRUIT.