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  1. V

    HELP - resistors and dip-switch

    Guys By whisper I meant irritable, nagging, down warring sound, doesn’t mater how soft it is it will catch on to you. I will accept a whisper any day. What the use of trying to get rid of the fan noise, and replacing it with electronic noises. Can PWM on a 12v case fan’s, be quiet enough, to...
  2. V

    HELP - resistors and dip-switch

    allvol Imagine working on your PC and you have this constant whispering in your ears. Not practical. Is there a solution ? Much higher frequency mabe.? HELP MAN HELP ! Virus
  3. V

    HELP - resistors and dip-switch

    audioguru / allvol I have built (bread boarded) about
  4. V

    HELP - resistors and dip-switch

    Allvol How was your golf day? Thanks for the links, interesting info. The best I can describe for you what I want to do is, if it is at all possible for you to build the circuit in Rely 14, 3 components only. You can adjust the trim pot for the fans to come to a dead stop when your PC is...
  5. V

    Hobby lathe, metal turning.

    Hey DAZZA See in what big letters I type, (eyes isn’t that good any more), please save me 10 page of reading, and tell me... Again, sorry for being so nosey, what is the “…hydrogen project,” for ? ? ? ? WHAT DO YOU WANT TO DO WITH A “ hydrogen reactor chamber . . . “, WHAT IS THE END...
  6. V

    What are Solder Pots used for

    MP Thanks, makes sence if you dip it into flux first. Virus
  7. V

    HELP - resistors and dip-switch

    audioguru I was wondering why it is recommended to use
  8. V

    HELP - resistors and dip-switch

    Allvol Enjoy tee, remember still need a answer on this side. Luckily, accumulatively, on this forum there is a couple of years worth of experience. Awaiting your solutions and advices. Virus
  9. V

    HELP - resistors and dip-switch

    Allvol I had a ball playing with the fan’s. Did the 10k trim pot as per your diagram fan1.gif, works excellent, can get the fans down to just- just- just- turning (long pulses). I also left the other trim pot in place, between the 2 pot’s and changing the cap C2 with different values, what a...
  10. V

    What are Solder Pots used for

    MP I believe it is just a small steel holder with some solder in it ? Doesn't it leave a like droplet shape at the end of the wire?, making it difficult to put trough a hole? Virus
  11. V

    Schematic to Veroboard

    Arup Yep, normally under my nose.  ;D Thanx Virus
  12. V

    HELP - resistors and dip-switch

    Hi P1 is the 555 circuit of audioguru and measured on my MM. (Was running the fans etc.) P2 is the “textbook version” of allvoll and as measured after replacing the 47uF cap with a .47uF cap. My MM does not read if it is to slow. Yes, I did get the LED to flash, with the 47 uF cap. As...
  13. V

    Schematic to Veroboard

    arup I tried the web seams like "Stripboard magic" is not that easily available, would you be able to send it to me. Virus
  14. V

    What are Solder Pots used for

    MP Do you have a photo or a link of a solder pot. Could maybe be more descriptive. Thanx Virus
  15. V

    Hobby lathe, metal turning.

    Dazza Sorry for being so nosey, seams like all the other guys know, no one asked, what is the “…hydrogen project, for the construction of the reactor chamber.” for, this could be dangerous stuff, right ? Just for interest sake. Virus
  16. V

    HELP - resistors and dip-switch

    Guys I HAVE FOUND THE PROBLEM, I had the Mosfets supply and drian short-circuited on the breadboard as soon as the circuit switches on. DEAD SHORT INSTANT HEAT. With that sorted out I have successfully built the circuit in post number 19 (with the MC34071 opamp) and the one in number 34...
  17. V

    HELP - resistors and dip-switch

    allvol I like say it, "If you are right you are right.", sorry for ignoring you.
  18. V

    HELP - resistors and dip-switch

    audioguru Thanks for the circuit update, will build it this weekend and give you feed back. What should the value of D1 be ? ??? I will bug you a bit more later, I would like to get rid of the RDC 10K and rather use a solid resistor, with a 10 K thermistor, iaw, make it a circuit with a solid...
  19. V

    HELP - resistors and dip-switch

    I only had the led connected, no fans at all, wanted to see if the circuit at least is working. Resistor RF = 90Kohm Yes, for the 555, I can hear it load enough. I use the 0 - 30 VDC power supply from this forum, it does not even blink. audioguru, is the theory of this circuit good ...
  20. V

    HELP - resistors and dip-switch

    audioguru I have built the unit (Reply #19 on: May 12, 2006, 05:44:34 PM ) on a breadboard, 1 ste time not lucky.  The mosfet gets steaming hot instantly, if I clip + 12v to the circuit, with no out put to the led that I connected. I can hear the 555 oscillating. How can I test the opamp to see...
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