O'ClockDCF77

Using Arduino with Oled display and the DCF77 DCF_Empfangsmodul_DCF1 for a really nice and simple O'clock

O'Clock (Oled DCF77 Clock)

Library used for DCF77 are https://github.com/thijse/Arduino-Libraries/downloads

and usual U8glib for I2C Oled display running at full speed