Top Positive Review for Clock on Banggood|Shopping Philippines

50% OFF DS3231 AT24C32 IIC High Precision Real Time Clock Module US$8.18 US$16.36 View It

Overall:

YakumoRan 03/01/2019

Based on the DS3231 (SN or M) chip developed by Maxim in 2004, you receive a very accurate and temperature compensated x-tal oscillator for a low price. The accuracy is 2 ppm for the (SN) x-tal based micro device and 5 ppm for the MEMS (micro electro mechanical system) based clocks. Whilst I prefer the SN version, the MEMS appliance is said to be used in the automotive industry due to its shock resistance. Which the crystal tunig forks don't "like". With the I2C interface you can chain devices in parallel and save pins compared to an SPI based solution. An EEPROM and a battery allow you to sustain time keeping over external power loss. The Adafruit library forked from Jeelab is an excellent choice for the integration in micro-controller-units (MCU) such as Atmel (defunc. now Microchip) and Espressif based ESP32 or ESP8266 working horses. Walk past any other RTC, this is the real deal. There is a reason the design of these never changed much since 15 years of its invention! For extra convenience a square wave output of 1 clock tick per second is offered (1Hz) and a 32KHz (32768Hz standard clock freq.) signal directly off the x-tal. Happy coding!

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