U77,5 is an open-source project under the GNU Lesser Public License.
Decoding the German DCF77 time signal per USB sound card and a receiver module, setting the system time. "U" stands for USB and "77,5" for the full 77.5 kHz frequency of the time signal.
This project aims to demonstrate:
- how to build a "simple" hardware consisting of a DCF77 receiver and a low-cost USB soundcard.
- evaluation of the signal from the USB sound card (using PortAudio, see http://www.portaudio.com/ )
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This Page / Homepage of project: https://github.com/hayguen/u775
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Former Homepage of project: http://u775.sourceforge.net/
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Project page on SourceForge: http://sourceforge.net/projects/u775
Full partlist available from the German online shop https://www.conrad.de/
- 994000-62 SpeedLink USB 2.0 Mini-Soundkarte
- 641138-62 DCF Empfängerplatine
- 468266-62 EL Kondensator 47 µF 25 V
Like explained in Lesser GPL you get no warranty at all. We are not responsible for anything, even if you damage your hardware. You should know that we experimented - not knowing what we do. We are just lucky that it works for us.
Good Luck!
Comments, suggestions and bug-reports go to
Hayati Ayguen h_ayguen()web!de
Detlef Reichl detlef!reichl()gmx!org
GNU LGPL (GNU Lesser Public License, see COPYING)
--- LGPL --
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser Public License for more details.
You should have received a copy of the GNU Lesser Public License along with U77,5. If not, see http://www.gnu.org/licenses/