monostable 555 discharge

Discussion in 'General Electronics Chat' started by TheDag, Jun 10, 2012.

  1. TheDag

    Thread Starter Member

    Jan 1, 2010
    94
    1
    Hi,
    How Can I Make the timing capacitor discharge right after the pulse is done ?
     
  2. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Connect pin 7 to pin 6.
     
  3. Wendy

    Moderator

    Mar 24, 2008
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  4. TheDag

    Thread Starter Member

    Jan 1, 2010
    94
    1
    Hi
    When im trying to connect pin 7 with pin 6, the pulse is endless...
    here the schem
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    Try looking at the monostable link I gave you, your schematic isn't even close, and mine is straight out of the datasheet. You also ignored post #2.

    There is no substitute for reading.
     
  6. TheDag

    Thread Starter Member

    Jan 1, 2010
    94
    1
    Hi
    Bill, I Read this... But dont understood the "Red Wire" Thing...
    Can you explain please??

    Thanks
     
  7. Wendy

    Moderator

    Mar 24, 2008
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    It is a wire used as a switch, also to explain the limitations of the base monostable circuit and why the signal conditioner is needed.

    You can used Pin 2 as a direct input, but you could run into the illegal condition explained in the article. Why not perform the experiment as see how it works?
     
  8. TheDag

    Thread Starter Member

    Jan 1, 2010
    94
    1
    No,
    I Mean I Dont understand the wire, where connect it, and the schematic with the wire is confuse me
     
  9. TheDag

    Thread Starter Member

    Jan 1, 2010
    94
    1
    Ok
    did some tests....
    with the discharge pin, its endless pulse....
    and without discharge pin, its working but without the pin 2(how?)
     
  10. Wendy

    Moderator

    Mar 24, 2008
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    You are stuck on a schematic that does not work, you are not going to be able to make it work. You have an working example that is published, complete with exact explanations and illustrations.

    I am seriously getting the vib you haven't read most of the article, just looked at the pictures. If this is true, and you haven't asked the type of questions to dispute it, I can not teach you. The whole point of the article is when you have performed the experiment as written you will know the 555 monostable mode, all the why's and wherefore's of how it is done, and how the internal circuit of the 555 does what it does to make it work.

    I have just looked up your location. Is it you do not read English? If you are having trouble with specific verbage ask, quote it, those question I can answer.

    You are trying to modify a really basic circuit without understanding the basics. Reading is fundamental, there is no substitute.
     
    Last edited: Jun 11, 2012
  11. TheDag

    Thread Starter Member

    Jan 1, 2010
    94
    1
  12. TheDag

    Thread Starter Member

    Jan 1, 2010
    94
    1
    Please its important, Its will get 12v and i need its will pulse 5 seconds.
     
  13. Wendy

    Moderator

    Mar 24, 2008
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    I have answered your question, but you will not listen. There is nothing I can say. I am done.

    I'll repeat the earlier suggestion, try the experiment as written.
     
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