how to generate only four pulses through 555 timer.

Discussion in 'General Electronics Chat' started by fayazahmedmemon, Feb 22, 2011.

  1. fayazahmedmemon

    Thread Starter New Member

    Jul 4, 2010
    15
    0
    I know that through 555 timer we can make an Astable multiviberator for generating Pulses or oscillations.Can I generate only four pulses through the 555 timer and then timer turns off automatically? if this is possible then plz send me the circuit which should be added with the 555 timer for generating only four pulses?
     
  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,019
    1,542
    You could cascade four 555 monostables. the pulse from the first one would trigger the second and so on for your four pulses.
     
  3. tom66

    Senior Member

    May 9, 2009
    2,613
    214
    Think about a decade counter; such a device could be configured to produce four pulses.

    Paste this into falstad.com/circuit (under File>Import):

    Code ( (Unknown Language)):
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    I'll leave it up to you to figure out how to stop it pulsing initially when it turns on. The button otherwise controls it.
     
  4. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    Two timers, one to pulse them, one to control them.

    A timer connected to the reset line of a second timer will disable it, just work out the timing.
     
  5. Jaguarjoe

    Active Member

    Apr 7, 2010
    770
    90
    A $2 8 pin microcontroller will easily do this with no other parts. If you need a simple one to work with, try the Picaxe. All you need is the uC and a cheap programming cable that you can make yourself if you want. 3 manuals, a simulator and the easy to use Basic program are all free on their website. They have a very good forum and provide all the help you could want.
     
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