Modules RTC - Ability to determine the exact time – date and time – is important for many electronic devices ranging from simple clocks and alarm clocks, and ending centralkach smart home and loggerach measurement data. The indication of time is one of their main functions. Ready-made modules RTC provide the current date and time, not only when the available power supply, but in the case of an interruption in the supply of energy for example, in the accident, and our real-time clock the device has a guaranteed effect.
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RTC modules
Products: 20
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RTC Battery for Raspberry Pi 5
The Panasonic ML-2020 RTC battery was designed for Raspberry Pi 5 users who want to ensure uninterrupted operation of the real-time clock built into the board, even when the...
Index: RPI-23926
Index: RPI-23926
RTC module DS3231 I2C - real time clock
Module with real time clock, allows you to read the time in hours, minutes, and seconds, and to read the date: month, day, year. The device was based on the DS3231 system,...
Index: MOD-03790
Index: MOD-03790
Module with real time clock DS1302 RTC. It allows you to read the time in hours, minutes, and seconds, date: day, month, year. Communicates via I/O interface.
Index: OST-14303
Index: OST-14303
RTC PCF8563 I2C - real-time clock - Waveshare 3707
The module is equipped with chip PCF8563. It provides accurate and independent intervals. Operating voltage is from 1.8 V to 5.5 V. It allows you to read the time in hours,...
Index: WSR-04495
Index: WSR-04495
PiClock RTC PCF8563 I2C - real time clock + buzzer + battery for Raspberry Pi 3
A PCF8563 real time clock module whose supply voltage is maintained by a CR2032 round battery (included). The chip allows timekeeping while the Raspberry Pi is disconnected...
Index: MSX-06077
Index: MSX-06077
DFRobot Gravity - RTC SD2405 I2C - real time clock module
Module with real time clock SD2405 has a dual power supply system, when there is a lack of the main power supply, the module automatically switches to battery power.
Index: DFR-09380
Index: DFR-09380
RTC DS3231 I2C real time clock module - STEMMA QT/Qwiic - Adafruit 5188
A real-time clock (RTC) module from Adafruit. It features the DS3231 chip , which integrates a quartz resonator and temperature compensator to significantly improve the...
Index: ADA-20175
Index: ADA-20175
MSX RTC DS1307 I2C - real time clock
Module with real time clock and backup battery (battery included). It allows you to read the time in hours, minutes, and seconds, date: month, day, year. The communication...
Index: MOD-02717
Index: MOD-02717
Grove - DS1307 real-time clock I2C
Module from Grove features a real time clock DS1307, which voltage is supplied by a round CR1225 battery (not included) . It allows you to read the time in hours, minutes,...
Index: SEE-13332
Index: SEE-13332
RTC PCF8523 I2C - real time clock - Adafruit 3295
Module with real time clock and backup battery. It is used in applications written to register data, in clock, alarms, etc. Communication interface is an I2C bus.
Index: ADA-07662
Index: ADA-07662
RTC DS1307 + 32kb EEPROM 24C32 I2C - real-time clock with memory
Module with real time clock and backup battery. It allows you to read the time in hours, minutes, and seconds, date: month, day, year. It has 32 KB of EEPROM. The...
Index: GRL-12507
Index: GRL-12507
RTC real time clock module PCF8523 - STEMMA QT / Qwiic - Adafruit 5189
A real-time clock (RTC) module manufactured by Adafruit and featuring the PCF8523 chip. It is also a calendar optimized for low power consumption. Data is transmitted serially...
Index: ADA-20176
Index: ADA-20176
RTC DS1307 I2C - real-time clock - SparkFun BOB-12708
Module with real time clock and backup battery power. It allows you to read the time in hours, minutes, seconds, and dates: month, day, year. The communication interface is an...
Index: SPF-02405
Index: SPF-02405
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FeatherWing datalogger - RTC PCF8523 + microSD Shield for Feather - Adafruit 2922
The module is powered via battery and with the real-time clock RTC PCF8523 and a slot for microSD memory cards. FeatherWing extends the capabilities of the modules from Feather...
Index: ADA-05591
Index: ADA-05591
RTC DS1307 I2C - real time clock - Adafruit 3296
Module with real time clock and backup battery. It is used in applications written to register data, in clock, alarms, etc. Communication interface is an I2C bus.
Index: ADA-07664
Index: ADA-07664
RTC Pi DS1307 - RTC real time clock overlay for Raspberry Pi
Shield for Raspberry is based on a system DS1307 with real time clock. It connects via the I2C bus. The module has a socket for CR2032 batteries that support the operation of...
Index: ABE-11716
Index: ABE-11716
Velleman WPI301 - DS1302 SPI - real-time clock - 2 pcs.
Module with real time clock and backup battery. It allows you to read the time in hours, minutes, and seconds, date: month, day, year. The communication interface is the SPI...
Index: VEL-13018
Index: VEL-13018
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SparkFun Real Time Clock Module RTC RV-8803 Qwiic - SparkFun BOB-16281
Real time clock module. Based on the RV-8803 system ensuring precise timing while maintaining low power consumption . It also offers input for time stamp events along with a...
Index: SPF-21294
Index: SPF-21294
Fermion - SD3031 real-time RTC clock module - for Arduino - DFRobot DFR0998
High-precision real-time clock (RTC) module equipped with the SD3031 chip . It has an integrated quartz resonator and temperature compensator, which significantly improves the...
Index: DFR-22837
Index: DFR-22837
Module RTC DS1307 I2C - real time clock
Module with real time clock and backup battery power. It allows you to read the time in hours, minutes, and seconds, and dates: month, day, year. The device is based on the...
Index: MOD-09421
Index: MOD-09421
See also
RTC modules - ideal for emergency time determination
Even after the most accurate synchronization with the standard, the time indication function will be of no use if we do not provide our device with the ability to maintain power after a power outage from the main power supply or battery. For this purpose, a backup power supply is used, most often in the form of a small lithium battery or a small accumulator. However, the current consumption in the standby mode must be minimal so that the energy is sufficient for a long time. In addition, there is the need to calculate leap years and keep track of the number of days in a given month... This is the task for the RTC .
Always on time with the RTC module ( Real Time Clock)
RTC – i.e. real time clock – is such an important device that more advanced microcontrollers already have an appropriate unit built-in as one of the on-board peripheral systems. Simpler microcontrollers and evaluation boards (including Arduino), but also single-board computers (Raspberry et al.) are not factory-equipped with a real-time clock. In such cases, RTC modules come to the rescue. In our store you will find both small, cheap modules in the form of boards connected with goldpins, as well as fabulously easy-to-use Arduino shields and boards dedicated to Raspberry Pi .
Small is beautiful
Despite its many functions, an RTC clock is usually a small board, the size of which is primarily determined by the size of the battery or connector used. However, some of the modules impress with their small size, which makes them suitable for use in devices where space is particularly limited. An example of such a clock is the Tiny RTC, whose external dimensions are slightly larger than the diameter of a CR2032 battery. If, due to the use of the device, replacing the battery would be very difficult or impossible, it is worth considering purchasing a module with power supplied by a maintenance-free supercapacitor.
The RTC module, i.e. real time clock, is a device that allows very precise determination of both time and date. The module is an essential element of various electronic devices such as alarm clocks, watches, loggers, as well as control units that are the main element of smart home systems. One of the key advantages of RTC modules (real time clocks) is that they provide current information about both date and time even in the event of a power outage.
A good choice will be RTC modules (real time clocks) from Adafruit. Selected modules are equipped with a popular communication interface in the form of a 12C bus. The RTC PCF8523 I2C, DS3231 I2C - STEMMA QT/Qwiic, FeatherWing DS3231 Precision RTC (RTC clock overlay for Feather) and RTC DS1307 I2C models deserve special attention. Other RTC modules worth recommending are Grove - DS1307, RTC DS3231 I2Cl module, Pi Clock RTC PCF8563 I2C (intended, among others, for Raspberry Pi ), RTC Pi DS1307 and DFRobot Gravity - RTC SD2405 I2C. All the above RTC modules (and many others) are available in our store.