Using a $2 DS3231 RTC & AT24C32 EEprom from eBay

https://www.electronics-lab.com/using-a-2-ds3231-rtc-at24c32-eeprom-from-ebay/

Edward Mallon @ edwardmallon.wordpress.com gives us a detailed explanation about cheap RTC modules found on ebay and other places. I built the first few beta units with the DS3231 Chronodot from Macetech (about $18 each), but I kept on stumbling across cheap RTC modules on eBay, Amazon, etc. and I eventually bought a couple to try […]