DS3231 RTC Module: VCC → ESP32 3.3V (or 5V) GND → ESP32 GND SCL → ESP32 GPIO 22 SDA → ESP32 GPIO 21 Insert CR2032 battery into RTC module SSD1306 OLED Display: VDD → ESP32 3.3V GND → ESP32 GND SCK → ...

18 thoughts on “ Parts: ChronoDot RTC Module (DS3231) ” nemo says: October 27, 2009 at 9:08 am round pcbs make me cringe. Report comment. Reply. monkeyslayer56 says: ...

Arduino Uno/Nano: Microcontroller to interface with the DS3231 and manage alarm functions. DS3231 RTC Module: Provides accurate timekeeping and alarm features. LCD/OLED Display: (Optional) For ...

Discover a 3D-printed DIY 7 Segment Clock powered by Arduino Uno, stepper motors and a DS3231 RTC module. Designed for tabletop use, it features precise mechanical movement and digital control, making ...