255 - ChronoDot - Ultra-precise Real Time Clock - v2.1
Click here for documentation and example code
The DS3231 has an internal crystal and a switched bank of tuning capacitors. The temperature of the crystal is continously monitored, and the capacitors are adjusted to maintain a stable frequency. Other RTC solutions may drift minutes per month, especially in extreme temperature ranges...the ChronoDot will drift less than a minute per year. This makes the ChronoDot very well suited for time critical applications that cannot be regularly synchronized to an external clock.
The ChronoDot will plug into a standard solderless breadboard and also has mounting holes for chassis installation.
The I2C interface is very straightforward and virtually identical to the register addresses of the popular DS1337 and DS1307 RTCs, which means that existing code for the Arduino, Basic Stamp, Cubloc, and other controllers should work with no modification.
This new version has a battery holder, no soldering required!
| Tutorials on the Adafruit Learning System featuring this product: | |
![]() |
DS1307 Real Time Clock Breakout Board Kit Real time clock mini-breakout board |
![]() |
DeLorean Time Circuit Great Scott! |
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Real time clock (RTC) module dedicated to Raspberry Pi. Based on the Dallas DS3231 chip, it has a built-in backup battery
No product available!
Real time clock module based on the Dallas DS1307 chip. Backup of settings with CR1225 battery. SparkFun BOB-12708
Real-time clock with PCF8563 chip and battery backup. Modally MOD-48.Z
RTC clock module with PCF8563 chip and battery
RTC DS1307 real-time clock module and MicroSD card slot for the WeMos D1 Mini.
No product available!
Real time clock (RTC) module dedicated to Raspberry Pi. Based on the Dallas DS3231 chip, it has a built-in backup battery
No product available!
Real time clock (RTC) module PCF8523. It uses the STEMMA QT connector and communicates via the I2C interface. Adafruit 5189
Real time clock module based on the Dallas DS1307 chip. Backup of settings with CR1225 battery. SparkFun BOB-12708
Module with real time clock (RTC) PCF8523 dedicated for minicomputers Raspberry Pi. It communicates via the I2C interface. Adafruit 3386
Real time clock (RTC) module. It allows you to read data about the date and time. Communication with the module takes place via the I2C interface. SparkFun BOB-16281
Module with real time clock (RTC) HYM8563 designed for M5Stack sets. It is equipped with a Grove connector and communicates via the I2C interface. M5Stack U126
Real time clock (RTC) module DS1307. It is powered by 5 V and communicates via the I2C interface (Gravity connector). There is also a CR1220 battery socket on the board. DFRobot DFR0151
No product available!
RTC DS1307 real-time clock module and battery CR1220 for the WeMos D1 Mini
No product available!
Module with a precise real time clock (RTC) DS3232. It has an integrated crystal resonator, built-in SRAM memory and communicates via the I2C interface. DFRobot DFR0821
RTC DS1302 real time clock module with CR2032 battery holder and solder pins
No product available!
Module with a precise clock RTC DS3231 dedicated to the Raspberry Pi Pico. Communication via the I2C interface. SB Components 21420
The DS1307 RTC Module is a real-time clock module and a CR1220 battery backup battery. Communicates via the I2C interface. DFRobot DFR0386
Module with a precise real time clock (RTC) DS3231. It has an integrated crystal resonator and communicates via the I2C interface. DFRobot DFR0819
Module with the real time clock (RTC) RV-3028 dedicated to micro:bit. It communicates via the I2C interface. SparkFun SEN-15486
Module with real time clock (RTC) DS1307 and CR1225 battery socket. The board is equipped with a Grove connector and communicates via the I2C interface. Seeed Studio 101020013
RTC clock module with PCF8563 chip and battery
Adafruit 255 - ChronoDot - Ultra-precise Real Time Clock - v2.1