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RTC modules
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 - 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.
Frequently Asked Questions / FAQ
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.