Adafruit PiRTC DS3231 Precision Real Time RTC Clock for Raspberry Pi 4282
Adafruit PiRTC DS3231 Precision Real Time RTC Clock for Raspberry Pi 4282
This is the best battery assisted real-time clock (RTC), which allows your Raspberry Pi project to keep track of the time when power is lost. Perfect for data logging, clock setup, NTP servers, time stamps, timers and alarms etc. Equipped with a genuine DS3231 RTC, it works great with the Raspberry Pi and has native kernel support. The datasheet for the DS3231 explains that this part is an "Extremely Accurate I²C Integrated RTC/TCXO/Crystal". And hey, it does exactly what it says on the can! This real-time clock (RTC) is the most precise you can get in a small package with low power consumption. Most RTCs use an external 32kHz timing crystal used to keep the time with low current draw. And that's all well and good, but these crystals have a slight drift, especially when the temperature changes (the temperature changes the oscillation frequency very, very very slightly, but it adds up!) This RTC is in a bold package as the crystal is in the chip. And right next to the integrated crystal there is a temperature sensor. This sensor compensates for frequency changes by adding or removing clock ticks to keep timing on schedule. Many "cheap" DS3231 RTC boards do not use genuine Maxim DS3231 - you will receive an uncalibrated RTC that does not maintain the specified timekeeping quality. Adafruit purchase these DS3231's from Maxim direct so they know they are 100% genuine. Note: This product does not come with a CR1220 button cell battery or Raspberry Pi. Product dimensions: 21.3 x 20.0 x 13.6 mm. Item Weight:2.7g Compatible with Raspberry Pi 1, Pi 2, Pi 3, Pi 4, Pi Zero, A+, B+, etc. Fully assembled and tested PCB plugs directly into your Pi's GPIO pins - no soldering required. Lasts time for 5 years or more
Product Features
- The best battery operated real-time clock (RTC) you can get that keeps your Raspberry Pi project track of the time when power is lost.
- Perfect for data logging, clock making, NTP servers, time stamps, timers and alarms etc.
- Compatible with Raspberry Pi 1, Pi 2, Pi 3, Pi 4, Pi Zero, A+, B+
- Fully assembled and tested PCB connectors directly into your Pi's GPIO pins - no soldering required
- Lasts time for 5 years or more