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Ultra-accurate DSP-based DCF77 Timecode Receiver

Beats commercially available demodulators hands down

Published in issue 421, January 2012

Ultra-accurate DSP-based DCF77 Timecode Receiver

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.

Relevant websites

Free downloads

www.marvellconsultants.com/DCF
www.analog.com/en/embedded-processing-dsp/adsp-21xx/processors/design-handbooks/scientist_engineers_guide/resources/fca.html
www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=81
www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2519&param=en534451&page=wwwdevMPLABEmulatorDebuggers
www.microchip.com/filterlab
www.ptb.de/en/org/4/44/442/dcf77_1_e.htm
www.daftlogic.com/projects-google-maps-distance-calculator.htm
http://bit.ly/faQrb2
http://hw-server.com/design/pcf8574/komponenta_pcf8574.html
http://electronic-engineering.ch/microchip/datasheets/dcf77/dcf77.html

Click below to download a PDF copy of this article from Elektor magazine.

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	Magazine January 2012
	UK421 (USD 7.90)
	Free downloads
	Project files (PCB + Software) Free download

Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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