Random Audio Noise Generator

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Reverse-biased PN junction
  1. Chris's Workbench
  2. white noise generator
  3. tunneling
  4. avalanche
  5. LM386 opp amp
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I rate this video at 3.6 roentgen, not great, not terrible. 😂😂
I kid i kid, that was a really nice explanation of what was going on there without being a 25 minute video telling me about your neighbours dog before you actually got to it. Well done

zyeborm
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I replicated your projected and it did work. Fun! Thanks! I used all of the same part numbers - the 3904 transistor - I even had a 386 all ready built up as a simple bench audio amp - etc. It got me to wondering, if just a plain diode could be used in the place of the transistor. If so, what type of diode would work best and why? I guess one that would tunnel and avalanche easily... I do not know enough about diodes to make that selection.

td
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Interesting. I have found that some bandwidths of noise help me sleep. I run a small table fan, on my bedside table, for the purpose. I imagine your generator would sound more pleasant with a proper full range speaker. Maybe some passive tone controls could be added. I would have very much like to have seen it on a scope. I would have also liked to have known how to change its frequency. An enjoyable tutorial. Thank you. I do know about all the free YT sleep videos. I use them, as well. But, you have inspired me to see if I can DIY something. Was it just an experiment, or are you going to use it to inject noise on to your frequency generator to make a test signal?

td
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If I understand correctly, it is not so easy to generate a true random number with code with a typical MCU/Arduino/PIC, as it takes a lot of computing power. If I have that correctly, then I wonder if the three component random generator that you are using might be a solution... Use it to generate the random impulses and have the MCU just count them.

td