555 frequency formula

Discussion in 'The Projects Forum' started by nerdegutta, Feb 23, 2010.

  1. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
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    Hi,

    Sorry if this is off topic.

    I'm looking for for a way/formula like this page:

    http://www.electronicdesignworks.com/utilities/555_component_finder/555_component_finder.htm

    Can someone please explain to me how this works. I find the page very useful, and I would like to put the formula in an open office spreadsheet/Excel, save it on my laptop, and work on it off line. (Meaning when I'm in my sailboat. Looking forward to lazy days in the summertime. I have aprx 150cm snow in my garden.)
     
  2. 7Arrows

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    Feb 14, 2010
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  3. Wendy

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  4. Wendy

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    Mar 24, 2008
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    That reminds me, I also made this for that kind of application a while back...

    [​IMG]

    It is missing some nifty circuits I've put in my cookbook, but it covers the basics.
     
  5. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
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    Thank You for your replies. I've read your articles mr. Marsden, and they are leading me in the right direction.

    Thanks again.
     
  6. t06afre

    AAC Fanatic!

    May 11, 2009
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    Hei Jens
    I think they have made the program using the formula in the 555 data sheet. And a database with standard resistor and capacitor values. I tested the site and some of the values suggested are only theoretical values at the best
     
  7. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
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    Yes. That was my conclusion too. I always pick the nearest component.
     
  8. t06afre

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    By the way. Have you looked at micro controller units(MCU) technology Jens. You can get MCUs in a 8 pin dip. You can do a lot cool stuff with those chips. And I know you like programming.
     
  9. nerdegutta

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    Dec 15, 2009
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    Programming is great fun! :D

    I tried to build a few 16F84A programmers, but I didn't get it to work properly. At least that is what I think...

    I will get back to programming chips.
     
  10. t06afre

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  11. Wendy

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    The link is dead due to timeout, you must be logged in to access it.
     
  12. t06afre

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    Sorry the link was for my eyes only. Go to www.elfa.se then click on the picture with the brain. Select the PICKIT 2 Starter Kit link. The link is to a Scandinavian equivalent of the Digi-key store
     
  13. nerdegutta

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    Dec 15, 2009
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    Don't you need a company account to buy from that site?
     
  14. t06afre

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    No not at all. And they have a shop in Oslo. Just PM me if you need help. I am from Norway
     
  15. nerdegutta

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    Dec 15, 2009
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    Thank you. I might just do that.
     
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