DS3231 RTC real time clock for ARDUINO+24C32

The DS3231 module is an accurate real time clock board. This module is an improved version of the real time clock (DS1302). The module can be used to automate street lighting, watering plants or other projects.

The DS3231 module is designed based on the DS3231N chip, AT24C32N memory chip and other auxiliary components. The DS3231N chip consists of: a quartz resonator, a temperature sensor and a thermal compensation circuit. In this module, the time does not change with temperature, since the microcircuit has a thermal compensation circuit. The DS3231N chip records seconds, minutes, hours, days, weeks, months and years. Also makes allowance for leap year. The module supports 12 and 24 hour time format. In addition, the module has two alarm clocks. The AT24C32N memory chip has 16 pins and is made in the "SOIC8" package. If necessary, you can change the address of the AT24C32N chip using pins A0, A1 and A2. Changing the address will increase the number of connected AT24C32N chips.

The module is connected to the microcontroller device via the I2C bus. The module board has 6 pins:

32K: 32kHz pulse output
SQW: alarm interrupts or pulse output in the range 1 - 8192 Hz
SCL: clock line, I2C interface
SDA: data line, I2C interface
VCC: 5V power supply
GND: ground

The DS3231 board has a place for a battery, which, in the event of a power failure from the board, will keep the module on. The battery can be CR2032 or LIR2032-3 lithium battery.

The module can be powered from an external 5V power supply, Arduino platform or other microcontroller device. The presence of power is signaled by an LED that is connected to the power buses.

Battery power supply is not included.

Module Specifications:

Chip DS3231N
Memory chip AT24C32N
Supply voltage, V 3 ... 5.5
I2C interface
Operating temperature, °C -40 ... +85
Module dimensions, mm 38 x 22 x 14

Scheme for connecting the module to Arduino Uno: