Recent content by nickagian1

  1. nickagian1

    swicth on/off

    Great! Then I think the .pdf is perfect for your switch! As I also said, you can use a MOSFET instead of the BJT in case you need more current (moreover with MOSFET I think you don`t have to use any resistor)
  2. nickagian1

    PCB help

    Hi jarmund! I`m afraid that I can`t help you with the first point. However concerning the second one you can have a look at this topic : http://www.electronics-lab.com/forum/index.php?topic=171.0, you may find it useful. I haven`t yet, but I think it worths a try. I`m interested in a guide...
  3. nickagian1

    swicth on/off

    Hi haji_timur! What do you need the switch for? Is it a digital +5V/0V switch probably? Can you give us some more information about it? However have in mind that probably you have to use a BJT or MOSFET. Have a look at the .pdf below. Transistor.pdf
  4. nickagian1

    Capture:Where is the electrolytic capacitor and the fuse?

    You have right...  :-[ It was silly of me, I didn`t even think about it!!
  5. nickagian1

    Capture:Where is the electrolytic capacitor and the fuse?

    MNA thank you very much! I have found them in the same library as you said! It was too big and I didn`t pay attention to all the parts in it.  :-[
  6. nickagian1

    Capture:Where is the electrolytic capacitor and the fuse?

    Hi all! I am using Orcad Capture 9.2 and I am looking for the symbol of an electrolytic capacitor with the curled line (not that one with the two parallel lines) and additionally the symbol of a fuse. Can anybody tell me in which libraries can I find them? Thank you!
  7. nickagian1

    Question about 74LS07

    I guess you are right... I have a problem with one circuit containing the `07 and thought it was burned...so I checked it seperately and found this behaviour strange. But you are right with that open collector. Thank you!
  8. nickagian1

    Question about 74LS07

    Hi all! I am confused a little bit with something related with the IC 74LS07. This IC has buffers, isn`t that correct? So let`s choose the first gate and apply +5V at the input (1A). I expect to get +5V at the output of the gate (1Y), right? So why is that not working with my chips? ??? (I...
  9. nickagian1

    Forumla for rectified and filtered voltage

    Hi defaced! Well this is what I have learned in my university: 1)At a half-rectifier circuit (look at the first two circuits at the picture posted by Ante) the output voltage amplitude is given by the formula Vout(amp)=E(rms)xsqrt(2)-VD0 [sqrt->square root, E the voltage at the secondary...
  10. nickagian1

    counting device

    I mean an IR emmiter and an IR receiver, I have called this a 'couple' because they cooperate with each other. In fact they are two seperate devices!
  11. nickagian1

    counting device

    Moreover I want to add that my idea is to use two couples of sensors, (perhaps IR emmiter/receiver is a very good solution, as StathisCy also said) and put both of the couples at the door with some distance between them. In such a way you can also check if somebody is coming in or out..e.g. when...
  12. nickagian1

    Resonator datasheet needed

    I have asked for a ceramic resonator at about 10MHz for my microcontoller project and I was given this one...the only thing that is written on it is "L10.7A",which I guess shows the frequency, 10.7MHz...that is all I know about it! Oh and it has a red dot above one of the side pins.. But thanks...
  13. nickagian1

    Resonator datasheet needed

    :o I didn`t know it and unfortunately I don`t know exactly what resonator I have. However I can tell that it has 3 pins and I have bought it to use in a project with a PIC microcontroller, if that helps you..
  14. nickagian1

    Resonator datasheet needed

    Hi all! Does anyone have a datasheet from a ceramic resonator (it doesn`t matter which)? Basically what I want to know is which pin is what! Can anybody help me with that?
  15. nickagian1

    Op-Amp Question

    Hi Electrical_tech_Student! When you use the formula Acm=(Aol/CMMR), all the quantities have to be pure numbers without dimensions (not dB), so you cannot use CMMR=76dB and Aol=81000 at the same time! You have to convert 76dB into 10^(76/20)=6300, since CMMR(in dB)=20log10CMMR. Then you can use...
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