- on Hobby & Modelling
- Published in issue 1/2012 on page 48
Ultra-accurate DSP-based DCF77 Timecode Receiver
Beats commercially available demodulators hands down
To extract the highest possible accuracy from the German DCF 77.5 kHz timecode broadcast this project uses DSP algorithms running on a low-cost dsPIC33 microcontroller to filter and demodulate both the AM and phase modulated signals, while also producing a very stable 10 Hz carrier-locked reference clock output.