Recent content by jmjsilvester

  1. J

    Gradually changing the phase of a signal

    Hello all. I have produced a square wave with a given frequency (period of about 0.5 seconds). I am trying to match the phase of the square wave with a periodic pulse of the same frequency. I can detect when I have acheved the phase difference between them of zero but I need a way to...
  2. J

    Creating a square wave pulse at the peak of a sin wave

    Ah that seems perfect! Thanks a lot jim really helpfull. (I just found this and was having a little play with it http://www.falstad.com/circuit/e-555monostable.html) Must say the whole process does seem quite complicated but it does look like it will do the trick. Now just to have a...
  3. J

    Creating a square wave pulse at the peak of a sin wave

    Thank you all very much for the replies. That is a very clever idea and defenitely something that I will look into. However, I would like to trigger only on the peak of the sin wave, not twice per period. Unless I am mistaken this will trigger every time the integrated signal crosses zero.
  4. J

    Creating a square wave pulse at the peak of a sin wave

    Hi all, I am trying to create a square wave pulse that lasts for a relatively small amnount of time which corresponds (as close as possible) to the peak of a sin wave input of period about 1 second. The only way that I can think of doing this is via a programmable device such as an arduino...