Recent content by Untitled_user

  1. Untitled_user

    Some kind of RPM counter

    Hi! I'm back again. I assembled the counter...  ;) Tooked BPW40 and ordinary white LED. And of course, there are the problems... 1. It works just fine when I put the diode on one side of rotating disc and transistor     on the other, and cut a hole in disc so Tr can 'see' diode in one moment...
  2. Untitled_user

    Convert your projects in 3D mode

    Hello!  :D After I saw this topic, I immidiately downloaded and tried this software and I have to say it's absolutely awesome. Realy impressed me. Bravo! Thank you guys for reference!  8)
  3. Untitled_user

    0-30 Vdc Stabilized Power Supply

  4. Untitled_user

    0-30 Vdc Stabilized Power Supply

    OK. Lets mess it out! I parallel transformer secondary windings and i get 30V 4.3A AC. And ... I buy OPA445AP's.  :o And thing is gonna work. Will it? How? And wich partslist to use? Need I change something more? Cheers...  ;D
  5. Untitled_user

    0-30 Vdc Stabilized Power Supply

    Hi. There is no way that this circuit will work with my transformer? Adding a parrallel R to trafo output to drop voltage? Current will be too small? Connecting together both trafo outputs is out of question, right? Something else? And I really cant afford 445 OPs to me... international...
  6. Untitled_user

    0-30 Vdc Stabilized Power Supply

    Hello!  ;D I am looking this power supply for some time and I was planning to build it; in fact I still am interessted in this project, but I need some answers, so, please: 1. I have a 30/30 V transformer 100VA total, 1.7/1.7A secondary output. Can I use          it? What for output I will...
  7. Untitled_user

    Some kind of RPM counter

    OK, and thanks a lot! I will buy parts as soon as i get and assembly this circuit... Till then... Cheers!
  8. Untitled_user

    Some kind of RPM counter

    Hello, sorry about theese opto isolators... Here is the filtered list... opto.txt
  9. Untitled_user

    Some kind of RPM counter

    Audioguru?
  10. Untitled_user

    Sequence counter

    Hi, I see that not a lot of peoples here are using MultiSim...  :( Theese switches you can find in Electromechanical components... (component toolbar)
  11. Untitled_user

    Some kind of RPM counter

    Hi, well, i really don't know wich ones to take... never had experience with photo elements before... but, its time to change it... I atached a list of elements from our 'local' shop... don't worry, it's only about 30 of them...  ;D And I'm soory if the choice is bad... we don't have much...
  12. Untitled_user

    Some kind of RPM counter

    Hi, This was realy quick and professional... Very nice  :D THANKS!!! Of course, have a question again: Can you, please, write down some diodes and transistor pairs that can be used..? I looked online catalog here by us and it's a bit confusing... And, I supose that now I can directly drive...
  13. Untitled_user

    Some kind of RPM counter

    After long time, hello again... I'm back to bother you... Audioguru: I would ask you something: Would you, please, be so good to quickly sketch a schematic for me? I see that if we (better said I  :-[) continue so, we would come nowhere...  I belive that would not be too big problem for master...
  14. Untitled_user

    Some kind of RPM counter

    Hi, I was thinking a bit about that counter... I redraw those schematics and now I'm posting them; one with LM2917, and other with 555 timer. I do not know if this one with LM will work, but it looks damn simple  ;D And if I use the 555 circuit, I will anyway have to use freq. to voltage...
  15. Untitled_user

    Some kind of RPM counter

    Well, on this schematic from datasheet, I actualy wanted to ask if magnetic principe could be somehow changed with optical... i forgoted  :) I belive that magnetic could not be used, beacuse it's about electric motor, so it will disturb the work of counter... And on this design with 555 I...
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