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Recent content by wyiancwc88

  1. W

    how to generate a 2 MHz pulse with 30% duty cycle using PICbasic.

    I have a few questions here: 1. Is every instruction cycle= crystal freq/4? 2. If crystal = 20Mhz, a single instruction cycle = 5Mhz or 0.2us right? 3. I wan to generate a 2MHz pulse wave with 30% duty cycle.. Can i just send HIGH to a port and then LOW it? just like this, _______...
  2. W

    What is the procedure for PIC timer0 to generate a 1 ms or 1 sec interrupt?

    Re: pic timer0 How to get a 2 MHz pulse with 30% duty cycle from 20 MHz crystal? Can anyone provide me the code? thanks..
  3. W

    how to generate a 2 MHz pulse with 30% duty cycle using PICbasic.

    Actually I'm new to PIC and I am not really know how it operates, so can you provide me the source code? Thx a lot.
  4. W

    how to generate a 2 MHz pulse with 30% duty cycle using PICbasic.

    I am using PIC 16F877A with 20MHz crystal. I am wondering can it generate a 2MHz clock pulse with 30-40% duty cycle. Can anyone help me on this?
  5. W

    22Mhz sample and hold circuit

    The problem is, my lecturer wont allow me to use a single chip, I have to construct a full circuit instead. The good news is as long as I can reach more than 5Mhz it should be ok. Help me please. Really appreciate it.
  6. W

    22Mhz sample and hold circuit

    Hey guys, I need some help here. Can you please give me some direct hint on how to build a 22Mhz sample and hold circuit? It's for my lab next week. Thanks.
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