555 lamp dimmer

Discussion in 'The Projects Forum' started by capacitivedischarge, Dec 8, 2009.

  1. capacitivedischarge

    Thread Starter New Member

    Dec 8, 2009
    1
    0
    Hello all,

    I am doing an electrical engineering project and I seem to be stuck on a few points. What I need to know is the limits of the below lamp dimmer project/555 timer and how it may be improved. Any insight would be more then appreciated.
    Thanks
    [​IMG]
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    A standard 555 can only switch a load that draws <200mA. Any lamp you are likely to grab will draw more like 1A, so you will need to add a transistor/FET switch between pin 3 and the lamp.
     
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