ماژول ساعت فوق دقیق DS3231:
The DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line.
The DS3231 is available in commercial and industrial temperature ranges, and is offered in a 16-pin, 300-mil SO package.
It includes a rechargeable battery backup. This module also has a header with a pinout specifically designed so that it can be plugged directly into the IO header of your Raspberry Pi without any need for additional wires or soldering.
Utility Power Meters
Input Voltage: 2.3V ~ 5.5V
Clock Accuracy: ± 5ppm (± 0.432 sec / day)
Temperature Sensor Accuracy: ±3°C
Frequency: 1Hz, 32.768kHz
Pin Number: 5 Pin
Operating temperature: -40°C ~ +85°C
Size: 14mm x 14mm x 14mm
Reset button and button input.
Complete clock functions include seconds, minutes, hours, day, date, month and year timing, and provide valid to 2100.
Two calendar alarm.