Radio Time DCF77
Summary
Receives and decodes longwave time signals from the DCF77 radio station to provide accurate date and time.
Description
The DCF77 component synchronizes system time using the German DCF77 longwave time signal (broadcast at 77.5 kHz from Mainflingen, near Frankfurt). DCF77 carries highly accurate time information derived from atomic clocks, including date, time, and daylight saving adjustments.
This component is especially useful when internet-based synchronization (e.g., NTP) is unavailable, providing a reliable offline source of precise time. It is commonly used in:
Embedded and Arduino projects requiring autonomous real-time accuracy
Clocks and timing systems that must run without internet access
Industrial and scientific equipment needing radio-based synchronization
Diagram:
Categories
Category Generators/Date/Time – Hardware or signal-based time generators.- Category Date/Time – Components for handling and synchronizing date/time.
- Category Data Sources/Date/Time – External time data input sources.
Properties
- Enabled – Enables or disables the component.
- On Rising Edge – Boolean; if True, signal decoding is triggered on rising edges of the input signal (default: False → falling edge).
- Time Zone Offset (H) – Integer; time zone adjustment in hours relative to UTC.
Pins
- Data – Digital input receiving the DCF77 signal.
- Out – Date/Time output synchronized with the decoded DCF77 signal.