• Conrad C-Control DCF Module (Conrad)
• Arduino Mega 2560 (Watterott)

The source firmware is implemented using Arduino.

The core aim of the implemented algorithm is high stability and robustness.

The code can be found on GitHub https://github.com/shackspace/hgg/tree/master/hardware/dcf77.

• EM-406 GPS Module
• Adafruit GPS Logger Shield (Watterott)
• Arduino Mega 2560 (Watterott)

• SimpleGPS A very simple piece of Arduino code that measures the time between two PPS pulses

• Averaging and interpolation code to increase accuracy
• Higher clock rates for more accuracy
• Define interface for module interconnections