i need npn transistor that works (newbie)

Discussion in 'General Electronics Chat' started by bulletprasath, May 28, 2011.

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  1. bulletprasath

    Thread Starter New Member

    May 28, 2011
    Refer Circuit fig below. I replaced 33k R with 100k pot, 100uF with 1000, 220R with 470R, source 14.4V motorbike battery

    Flashing of 1 led did happen:D . But when i connected it to an array of 5(series) X 8 in total 40 led. Voltage dropped across output, only max of 10 led flashed and later on npn failed, tested with multimeter no reading . now its not flashing, glows steady.:(

    Plz suggest me " Capacitor and NPN " that can handle more. amp used by array is 250 mA and 3012 mW

    I have attached circuit and array fig. source for this project are throbbing led:confused: hunk breathing :D

    Last edited: May 28, 2011
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    Welcome to the forums.

    We can't help you on this topic, as it is restricted in out Terms of Service -
    Last edited by a moderator: May 28, 2011
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