Forum Rule: Always post complete source code & details to reproduce any issue!
Tab Content
  • pwd847's Avatar
    04-27-2020, 01:12 AM
    So it seems a major issue that has gone unnoticed for awhile is our subpar sample rate. We made some adjustments, and now the project is mostly working (Without the FFT). I think that we will do pretty well in the...
    39 replies | 1506 view(s)
  • pwd847's Avatar
    04-26-2020, 12:23 PM
    pwd847 replied to a thread FFT on Teesy 4? in Project Guidance
    Well I have about 24 hours to code my own FFT then. Hmmm...
    15 replies | 388 view(s)
  • pwd847's Avatar
    04-26-2020, 03:49 AM
    pwd847 replied to a thread FFT on Teesy 4? in Project Guidance
    I just watched the relevant portion of the audio tutorial again, and scoured the prjc site for more info on the FFT direct from the ADC, and I don't see anything wrong with my code. The error makes it look like...
    15 replies | 388 view(s)
  • pwd847's Avatar
    04-25-2020, 08:51 PM
    pwd847 replied to a thread FFT on Teesy 4? in Project Guidance
    I get this when I try to compile this: #include <Audio.h> #include <Wire.h> #include <SPI.h> #include <SD.h> #include <SerialFlash.h> // GUItool: begin automatically generated code AudioInputAnalog ...
    15 replies | 388 view(s)
  • pwd847's Avatar
    04-25-2020, 07:27 PM
    Is it possible to do an FFT on the Teensy 4? I was reading that the audio library wiring doesn't work to connect ADC(A0) to the fft1024_1.
    15 replies | 388 view(s)
  • pwd847's Avatar
    04-25-2020, 05:51 PM
    #include <Audio.h> #include <Wire.h> #include <SPI.h> #include <SD.h> #include <SerialFlash.h> #include <FastLED.h> #define LED_TYPE WS2812B #define COLOR_ORDER BGR
    39 replies | 1506 view(s)
  • pwd847's Avatar
    04-25-2020, 05:24 PM
    After filtering and then biasing the signals, we basically have the majority of the hardware part of the project complete. However, the higher frequencies are still present in the bass signal. The bass isn't really...
    39 replies | 1506 view(s)
  • pwd847's Avatar
    04-20-2020, 03:10 PM
    Do I have to cut the VIN<>VUSB pad if I power it without the usb cable plugged in under normal operating conditions, and when I plug in the usb cable to update code, I remove the external power supply connection? Or...
    14 replies | 566 view(s)
  • pwd847's Avatar
    04-19-2020, 03:32 PM
    Yes the circuit linked in post #33 has nothing to do with our project. It was just to test that the opamp can have a clean output (meaning the output of the opamp). As it turns out, when i switch the inverting and...
    39 replies | 1506 view(s)
  • pwd847's Avatar
    04-18-2020, 03:05 PM
    That makes sense. However, the ADC wasn't even connected. I isolated this circuit...
    39 replies | 1506 view(s)
  • pwd847's Avatar
    04-18-2020, 11:25 AM
    So it seems that running audio through the lm358 adds some static/crackling type noise. I did some searching online and found that there are audio opamps. Have you ever used a opa1671?
    39 replies | 1506 view(s)
  • pwd847's Avatar
    04-13-2020, 10:15 PM
    So the LM358P's are working for the biasing circuit. Still needs to be dialed in just right but I can tell it will work. Phew! Looks like N-order filters will be needed as well. The tweets and mids still trigger the...
    39 replies | 1506 view(s)
  • pwd847's Avatar
    04-07-2020, 12:26 AM
    When you say single supply mode, do you mean that V+ is a positive voltage and V- is GND?
    39 replies | 1506 view(s)
  • pwd847's Avatar
    04-06-2020, 09:58 PM
    So I think because we are already using passive filters before sending the signal into this circuit...
    39 replies | 1506 view(s)
  • pwd847's Avatar
    04-02-2020, 05:28 AM
    pwd847 started a thread Teensy 4 ADC in Project Guidance
    I have researched this to death. Not sure what to do at this point. I am sending a 50Hz sine wave into A0 to be read by the ADC. I print the values to the serial monitor. The values don't make any sense. What is...
    6 replies | 359 view(s)
No More Results
About pwd847

Basic Information

Statistics


Total Posts
Total Posts
35
Posts Per Day
0.41
Last Post
Senior design project UIUC 04-27-2020 01:12 AM
General Information
Last Activity
04-27-2020 01:12 AM
Join Date
03-02-2020