The first group of contacts contains the following pins: The contacts are distributed into two groups, pitch 2.54 mm. There is also a special place on the board for mounting a DS18B20 temperature sensor. The circuit is equipped with resistors, which allow providing the required signal level. Interaction with other devices and exchanging information with them is done using the I2C interface with contacts SCL and SDA. temperature measurement) and read the module’s information. The presence of memory allows you to record various parameters (e.g. This allows you to save on power because, in the case of uninterrupted use will have to spend more voltage, even with the presence of the battery. The module is justified in cases where the data is read rather rarely, at intervals of a week or more.
Both chips are interconnected via the I2C bus. The module has an AT24C32 chip – it is a 32kb non-volatile EEPROM memory. The battery is mounted on the backside of the board. It is based on the DS1307ZN chip and powered by a lithium battery to realize autonomous operation for a long time. The DS1307 is a module that is used for time counting. ☒ ppm at temperatures from 32 ☏ to 104 ☏ (0 ☌ to 40 ☌). Two outputs – first at 32.768 kHz, second programmable from 1 Hz to 8.192 kHz Moduleĭepends on the quartz – typically up to 2.5 seconds per day, it is not possible to achieve accuracy better than 1 second per day.
In this table, we have listed the most popular modules and their main characteristics. Comparison of Popular DS1302, DS1307, DS3231 RTC Modules The DS3231 circuitry has built-in quartz and thermal stabilization that allow for high accuracy values. The quartz resonator operates at 32768 Hz, which is a convenient frequency for a conventional binary counter. The electronic circuit includes a chip, a power supply, a quartz resonator and resistors. The real-time clock modules are used to solve this problem.
You can’t set the date or day of the week. But the main disadvantage of this function is that it resets to zero when the timer is on. The Arduino has a special function millis(), which can also read different time intervals. The clock counts in units that are convenient for the average person – minutes, hours, days of the week, and others, unlike conventional counters and clock oscillators that read “ticks”.
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