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  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...
  16. Untitled_user

    Some kind of RPM counter

    Hello again... Well, MP && Audioguru, i realy appreciate your efforts... Thank you... So, simpliest possibile solutions seems like this one posted bellow (from datasheet ... thx audioguru), and this one at (thx MP...) Which one do you reccomend to use and what modifications should I...
  17. Untitled_user

    Some kind of RPM counter

    Hi, writing just to say thank you on your posts... I have some ideas, but curently I dont have time... Will write back tomorow... Thanks!
  18. Untitled_user

    Some kind of RPM counter

    Hi, c'mon, please help me... I realy need help... :(
  19. Untitled_user

    Some kind of RPM counter

    Hi, don't know how to say thank you... Well, I have never used uControlers - I know something about them, but I don't have a programer, and I don't have any idea about programing language... I'm planing to learn that because I belive they're future, but... not yet... LM2917 is availabile. 100...
  20. Untitled_user

    Some kind of RPM counter

    Hi, look, I'm terribly sorry about this, but I messed up... and i will completely understand if you don't want to help me anymore...  :-[ Situation is next: i was looking for ICM7226 circuit, and I found it's price in my country is almost $50... plus everything else... I must say it's way to...
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