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Question abt making a spefic circuit

  1. Nov 12, 2008 #1
    what is the most simple circuit (with batteries as generator) i can make to make a light bulb or diiode keep going on and off?
    thank you for help

    << loud font removed by berkeman >>
    Last edited by a moderator: Nov 12, 2008
  2. jcsd
  3. Nov 12, 2008 #2


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    Science Advisor

    A battery in series with a (LED + Resistor / light bulb) and an on-off button. Arbitrary frequency and duty cycle. As long as your finger lasts, I guess (though it is the simplest!)

    ...Okay, so the next step up would maybe be a 555 timer in astable oscillator mode (Google for 555 timer, or 555 square wave).

    And PLEASE refrain from applying text effects to your entire post. Especially if it's just to make all the text really big.

    EDIT: Just a friendly notice to allow people to actually read your posts.
  4. Nov 12, 2008 #3
  5. Nov 12, 2008 #4
    resister and flashing led
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