DD4WH
Well-known member
For all SDR radio fans who use the excellent Teensy audio library, I would like to present some information that could be of interest for your own projects or for understanding how SDR radio with the Teensy could work.
Rich VE3MKC has prepared an excellent basis for a Teensy SDR radio (http://rheslip.blogspot.de/2015/01/teesy-sdr-project-update.html).
My Teensy SDR receiver implementation now has demodulation of LSB, USB, AM, DSB and "pseudo" StereoAM (USB right ear, LSB left ear) with adjustable filter bandwidths and the possibility to record audio from the radio to files on the audio board´s SD card. This has only been possible with the help of you guys of the PJRC forum, thanks very much!
I prepared a rather long document to explain the various demodulation and software functions and the audio path and how it works in detail and also a brief description of the hardware:
https://www.dropbox.com/s/zvh9y60i6a8pd84/Teensy SDR Documentation DD4WH.pdf?dl=0
The source code is available here:
https://www.dropbox.com/s/7ogsp0vfm6zldw3/Teensy_SDR_DD4WH_2015_12_16.zip?dl=0
(When you look at the code, please be patient, as I am not a programmer and many things can surely be made more effective, elegant etc.)
I have prepared several videos on Youtube to show you my version, the DD4WH Teensy SDR Receiver and the various menu entries and functions:
https://www.youtube.com/channel/UCz7YtteHS_qk7aumEbhIShg
In the hope that this will promote interest in the great Teensy platform for more SDR work, have fun with Rich´s SDR experimenting platform!
73 de Frank DD4WH
Rich VE3MKC has prepared an excellent basis for a Teensy SDR radio (http://rheslip.blogspot.de/2015/01/teesy-sdr-project-update.html).
My Teensy SDR receiver implementation now has demodulation of LSB, USB, AM, DSB and "pseudo" StereoAM (USB right ear, LSB left ear) with adjustable filter bandwidths and the possibility to record audio from the radio to files on the audio board´s SD card. This has only been possible with the help of you guys of the PJRC forum, thanks very much!
I prepared a rather long document to explain the various demodulation and software functions and the audio path and how it works in detail and also a brief description of the hardware:
https://www.dropbox.com/s/zvh9y60i6a8pd84/Teensy SDR Documentation DD4WH.pdf?dl=0
The source code is available here:
https://www.dropbox.com/s/7ogsp0vfm6zldw3/Teensy_SDR_DD4WH_2015_12_16.zip?dl=0
(When you look at the code, please be patient, as I am not a programmer and many things can surely be made more effective, elegant etc.)
I have prepared several videos on Youtube to show you my version, the DD4WH Teensy SDR Receiver and the various menu entries and functions:
https://www.youtube.com/channel/UCz7YtteHS_qk7aumEbhIShg
In the hope that this will promote interest in the great Teensy platform for more SDR work, have fun with Rich´s SDR experimenting platform!
73 de Frank DD4WH