555 Timer

  • Thread starter ravenprp
  • Start date
  • #1
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Hi, I have a 555 timer IC. For my work, my colleague asked me to make it so it can output 100 KHz frequency. (astable)

My Ra = 6.8 kOhms and my Rb = 4.7 kOhms...

I know that the Frequency = 1 / (T_high + T_low) where

T_high = 0.693(Rb + Ra) * C
T_low = 0.693(Rb) * C

Although I'm not too sure what to do from there.

Any help?
 

Answers and Replies

  • #2
berkeman
Mentor
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Do you have the datasheet with the design guidelines? That's the best place to start. If you have specific questions about the datasheet's guidelines, can you post a pointer to the datasheet, and I'll take a look.
 
  • #3
dlgoff
Science Advisor
Gold Member
3,864
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Does http://www.doctronics.co.uk/555.htm#astable%20components" [Broken] help?
 
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  • #4
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I got it, nevermind. Thanks though :)
 

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