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Need to step down a lead acid battery from 12vdc to 10vdc 350mA

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  • Need to step down a lead acid battery from 12vdc to 10vdc 350mA

    I would like to run a 6pcs 1W white led lights from a lead acid battery. A Single bulb input voltage is 3.2-3.6V & 350MA. I connected every 3 led's in Series (2 Groups) . Can I use 7810 IC or how can I do it. Sir Please send me a diagram .

    lead acid are in full-charge Max 14.5v. , in normal 12v, low 10v

  • #2
    LED's need CURRENT (amps) limiting even more critically than voltage. A simple resistor will not work well over a wide 11-15V range, so you should obtain a LED DRIVER made for your bulbs, or design a Constant Current supply for them. This is not a easy task. But most LED's have a commercial driver for them.
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    • #3
      You need a current regulator, not a voltage regulator.
      MSEE, PE

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