Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: Neutronned

Search: Search took 0.00 seconds.

  1. Replies
    30
    Views
    10,765

    Nice write up and all great points! I didn't...

    Nice write up and all great points! I didn't realize the A/D range was only 1.2V (and didn't bother to look it up, either... sorry!) The 3.3V supply on the Teensy looks pretty quiet already and...
  2. Replies
    30
    Views
    10,765

    That microphone module is still signing with a...

    That microphone module is still signing with a wonky 1.2-1.5Khz signal superimposed on the output. Might be the large capacitive load creating oscillation or maybe noise creeping in on the supply...
  3. Replies
    30
    Views
    10,765

    Does seem like a great product! 3.3V to 5V...

    Does seem like a great product! 3.3V to 5V input, variable gain via trim pot along with a variable bias would be good. Actually, you could have a variable max output and always have the bias at the...
  4. Replies
    30
    Views
    10,765

    Yes, that's the one! I've used that same circuit...

    Yes, that's the one! I've used that same circuit with line inputs from a headphone output and it works fine. Should work with any microphone module because it AC couples the input to the Teensy,...
  5. Replies
    30
    Views
    10,765

    I haven't found an alternative microphone module...

    I haven't found an alternative microphone module with a 0.6 output offset. Most are biased to mid-supply, like this one: https://www.sparkfun.com/products/12758

    This would still require that we...
  6. Replies
    30
    Views
    10,765

    FYI - I tried changing that 1Meg to a 220K on a...

    FYI - I tried changing that 1Meg to a 220K on a couple of the Adafruit MAX4466 microphone modules. Unfortunately, both exhibited a high level 1.2KHz ringing on the output. I changed one back and...
Results 1 to 6 of 6