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I struggled for awhile trying to get a working pin map for using all of the components: teensy 4.0, stacked audio shield, ILI9341, and MQS. I had to set the project aside. But now I hope to take it up again.

Another podcast you might find interesting This Week In Virology http://www.microbe.tv/twiv/

I would like to pursue the idea of mixing 60 kHz LO with the incoming signal to produce phase on DC for BPSK detection. But I'm puzzled how to detect the DC. I hear the DAC audio library output device is kaput on Teensy 4? Is there another technique?

Here is my code doing the AM decoding on WWVB https://github.com/chris-elfpen/Teensy4WWVBsdr

I feel like I'm on the edge of stupidity, looking over the fence into the land of understanding... but I can't seem to get there from here! I want to demodulate the phase encoded information on WWVB. I believe it qualifies as BPSK (Wikipedia confirms). To decode that, I think I need I and Q...

No, once I got a working antenna I focused more on the software side. I did do a bit of online research on shielded loop antennas. But I decided to try the direct approach with the parts immediately at hand.

Antenna note: I had some old wire from a CRT type television flyback transformer. I used a cardboard box approximately 2" by 14" by 12" and wrapped the wire around the perimeter of the box, about 30 turns (?) and secured with masking tape. Then I measured the inductance with my AudioVNA...

My project was to convert this DCF77 receiver to WWVB at 60 kHz. I have that working now based on the amplitude modulation. The conversion really didn't touch the SDR components except to change the reception frequency. I added sampling of the amplitude at 10ms intervals and then cross...

First Rule of Programming: It is probably your own fault. I was writing off the end of my sample array. Once I sorted that out everything was good with the display. IntervalTimer is exonerated.

Another issue: I wanted to try some cross correlation to try to detect weaker signal. I added an IntervalTimer to call my very small interrupt routine every 10ms so I could sample the current signal strength. The thing went kind of crazy. Parts of the display were messed up and I think maybe...

Thanks! I have gotten the code to compile and almost run on the Teensy 4.0. I had to comment out displayDate function. In runtime it is going to a line which does a sprintf calling function weekday() and hangs there. If I take out the call to weekday() it seems to run OK. I have some further...

Hi, I would like to implement this with the new Teensy 4.0. I have downloaded the source. My first attempts to compile are failing on I2S0_MCR and I2S_MCR_DUF being undefined. The clues seem to lead me to the audio library for these, but I have not yet found an actual definition of what they...

Putting voltage on VBat(+)/Gnd(-) did the trick!

Hi, I think this is my own fault. I was trying to go cheap, didn't have any long-tailed female pin sockets. So I used some stiff copper wire for pins. But that lead to hard insertion force into my project board. And hard removal too. I think that's when I did it. When I applied power nothing...