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Recent content by mohammadyou

  1. M

    Analog Fax modem Protocol

    Would you please give me some good source and reference about the signaling and protocol.
  2. M

    Analog Fax modem Protocol

    Thanks Fvm For your reply. I'm looking for Group 1 and 2 and I want to understand the protocol and message to send them into my computer
  3. M

    Analog Fax modem Protocol

    Hi I'm looking for the protocol that has been used in the analog fax devices and want to communicate with them to change that to digital. is there any board or chip that do this for me? where can I find information about the protocol. Tnx
  4. M

    [SOLVED] logarithmic voltage divide

    :)) I Thought it is something special. Again thank you for your help
  5. M

    [SOLVED] logarithmic voltage divide

    Thanks you guys That was amazing range switching would be best solution. but I didn't get the point of active logarithmic circuit. where can I find article about it?
  6. M

    [SOLVED] logarithmic voltage divide

    Thanks for your replies and sorry that I didn't explain it clearly. I want to sense a voltage from 10V-200V ac. the most operation voltages are around the edge (10V or around 200v) so I need to divide the voltage in order to measure it, however if I be able to use some logarithmic divider it...
  7. M

    [SOLVED] logarithmic voltage divide

    I wonder to know is there any logarithmic voltage divider?
  8. M

    The reason behind avoiding Track stubs

    Hi It is suggested that for EMI Compliance we should avoid track stubs in our design and has been said they produce harmonics and reflections. I'm looking for a good resources to dive into and find the logic? Thanks
  9. M

    circuit braker install direction

    Thanks Guys for your reply. I had seen the page but I can't get the point. for instance some kind of Circuit breakers are based on electromagnet and we put them in series. the input and out shouldn't be important because we just sense the fields and in both direction the fields that has...
  10. M

    circuit braker install direction

    Hi In my house my circuit breaker didn't work correctly. Its attitude was irrational. It was installed upside down (vertically that the on switch was placed in the buttom ). Some of my colleage told me that if I flip the device it works correctly. he was right and now I don 't have any problem...
  11. M

    IAR .dbg debug file not recognize in Proteus (AVR)

    I've dealing with this problem that I can't define a file as a debug file for proteus. I want to debug an atmega169 in it. After a day of googling, I've tried everything but nothing happened. I set the linker in IAR to UBROF-8 and it extension name to .dbg but Proteus doesn't recognize it. I...
  12. M

    Test the stability of a circuit against EMC

    Thanks for your reply, What kind of instruments or softwares do they use? How can I test my design ( for home users ) ?
  13. M

    Test the stability of a circuit against EMC

    Test the stability of a circuit against EMI Hi I have always worried abut EMI signal and its Effect on my design. what is the best way to examine the behavior of our design? How the major companies check their design in this term? Thanks
  14. M

    simulate emf field for buzzer

    in my case I can't
  15. M

    simulate emf field for buzzer

    I wanted to examine the field as well but you told me it is infeasible. have I got the point correctly ?
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