555 astable

Discussion in 'Homework Help' started by Viktor Vaughn, May 2, 2015.

  1. Viktor Vaughn

    Thread Starter New Member

    Mar 21, 2015
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    Hi everyone,

    I am stuck on the highlighted problem 14.12. It wants me to use a 555 in astable mode with an inverter to produce a pulse generator for the listed variable frequency ranges. The problem is I dont know where to start, and this text book is very bad when it comes to examples and explanation. if anyone can give me clear instructions how to solve this problem, would be strongly appreciated.

    20150502_232514s.jpg
     
  2. #12

    Expert

    Nov 30, 2010
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  3. ScottWang

    Moderator

    Aug 23, 2012
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    Next time, if you have any questions, please attach the clearly pictures and using compression software to compress to a appropriate size, thanks.
     
  4. WBahn

    Moderator

    Mar 31, 2012
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    Once you have an astable oscillator working (don't worry about what frequency or being able to change the frequency ranges, just get an oscillator working at any reasonable frequency, say something in the 1 kHz range), what can you do to set the duty cycle? What can you do to change the frequency (using a fixed capacitor value)? How does changing the frequency change the duty cycle?
     
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