Visualize the DCF77 radio signals with this clock. It also tell you the time.
Project tutorial by Erik de Ruiter
Weather Station based on Arduino and NodeMCU.
Project tutorial by miklas
4D Alarm Clock project is based on the concept of a digital alarm clock.
Project tutorial by 4D Makers
Customized Time Announcement and Wake-Up Alarming using MP3 audio files.
Project tutorial by Abe-Z
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