A Super-Accurate Clock Using A Tiny Microcontroller

A hobbyist project decodes the DCF77 longwave time signal broadcast from Germany using a small ATtiny microcontroller, displaying the time on an I2C screen. The build uses a push-button interface for switching display modes and resetting the DCF77 sync, and can optionally support an external temperature sensor and real-time clock module. The receiver hardware itself isn't part of the project, but building a simple longwave receiver for DCF77 is straightforward.

Source: https://hackaday.com/2026/09/15/a-super-accurate-clock-using-a-tiny-microcontroller. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.