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convert 4.7 volt to 1.5 volt DC

Discussion in 'General Electronics Discussion' started by arul narayanan, Jan 17, 2011.

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  1. arul narayanan

    arul narayanan

    Jan 17, 2011
    hi this is arul..
    I need to convert the output of a nokia mobile charger(4.7 volt) to 1.5 volt or less.

    is there any way to do this by simple components from household junk?
    i have some s8550, lm358, small coils lot of resistors , a UPS circuit board,LEDs.
  2. alfa88


    Dec 1, 2010
    The voltage drop across a silicon diode is in theory .7volts. 2 of them in series would be
    1.4 volts. I don't think a nokia charger puts out too much current so maybe try a couple rectifier diodes. 1N4001, 2, 3, etc. measure before you hook up your load.
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    You could use a LM317 adjustable regulator which will allow you to set the output voltage as low as 1.25V. The input current is the same as the output current and the extra voltage (* current) is dissipated as heat.
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