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  1. bigkim100

    555 Trigger

    Audio Guru(or anyone else), any way to add additional microphones to the input? Or maybe use a larger piezo disc?
  2. bigkim100

    555 Trigger

    Thank you Audio Guru. For some reason I never looked at the actual chip on board, assuming that it was an amplifier. You are correct, that it is a 555.
  3. bigkim100

    555 Trigger

    I am running both at 5Vdc
  4. bigkim100

    555 Trigger

  5. bigkim100

    555 Trigger

    https://www.digikey.ca/en/products/detail/parallax-inc./29132/2696577?utm_adgroup=Evaluation%20Boards%20-%20Expansion%20Boards%2C%20Daughter%20Cards&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Product_Development%20Boards%2C%20Kits%2C%20Programmers&utm_term=&productid=2696577&gclid=Cjw...
  6. bigkim100

    I need a sensitive audio trigger for a 555.

    LOL...thank you ANALOGUE...thats why I always run it through this forum
  7. bigkim100

    I need a sensitive audio trigger for a 555.

    https://www.internationaljournalssrg.org/uploads/specialissuepdf/ICETST/2018/ECE/IJECE-ICETST-P101.pdf I came accross this schematic. If it is too sensitive will removing one of the 2 transistors make this less sensitive??
  8. bigkim100

    I need a sensitive audio trigger for a 555.

    Im sorry, analogue, I have changed the specs to be only 1 channel. 1 mic, 1 amp 1 555 for timing. Quote:"However - the mic elements will not be able to differentiate between being brushed (a quiet noise close-up) and a yell, hand-clap, or other loud noise far away. How will you account for...
  9. bigkim100

    I need a sensitive audio trigger for a 555.

    I need a sensitive audio trigger for a 555. I would like to use a small microphone element that triggers a 555 when the audio element is brushed or bumped. I guess it would be best if there was adjustable sensitivity for the trigger Microphone. I would like the 555 to be timing on for around...
  10. bigkim100

    Changing microphone in to Line level in??

    I missed that, thank you
  11. bigkim100

    Changing microphone in to Line level in??

    https://www.aliexpress.com/item/1005003243273958.html?spm=a2g0o.cart.0.0.1f4d3c00DHbk99&mp=1 This is the explanation for the board: Product introduction: Microphone - microphone front stage amplification - microphone reverberation board - power amplifier. This microphone reverberation board can...
  12. bigkim100

    Schematic to pcb layout, or Gerber

    I have a relatively straightforward circuit (in my opinion ) that I would like to make several pcbs of...even if its just the track layout, just to print out and make my own boards (with Transferrable laser paper on a copper clad board). I only need 4 or 5 boards, so I dont know if its worth...
  13. bigkim100

    very low voltage, very low power emf generator,

    I have a buck voltage board form Ebay that has a torroid on it...if I take an antenna off of one of its outputs, will the rf noise radiate?, Usually these guys generate a lot of Rf noise?
  14. bigkim100

    How long will a 0.9ma nano motor unit last on a DCell?

    I only want it turned on once for a few seconds every 30 minutes or so, is that possible, and still have this run a long time
  15. bigkim100

    How long will a 0.9ma nano motor unit last on a DCell?

    This is the Motor...
  16. bigkim100

    very low voltage, very low power emf generator,

    If its splattering a bit wider frequencies...and only has a few inches of transmitter distance???
  17. bigkim100

    How long will a 0.9ma nano motor unit last on a DCell?

    Honestly, thats close enough for me.
  18. bigkim100

    very low voltage, very low power emf generator,

    Microvolts, as low as possible, as this will be housed in a sealed container. 3v would be nice, but any voltage will be considered. Radiated, if possible frequency:50/60Hz frequency (but that can be quite sloppy, doesnt need to be on the nose
  19. bigkim100

    very low voltage, very low power emf generator,

  20. bigkim100

    How long will a 0.9ma nano motor unit last on a DCell?

    How long will a 0.7 amp nano motor run on a DCell, under no load? Thanks for any help
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