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

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Goldensathiya
    Junior Member
    • Mar 2014
    • 6
    #1

    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
    Tags: None
    • Mike90250
      Moderator
      • May 2009
      • 16020
      #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.
      Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
      || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
      || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

      solar: http://tinyurl.com/LMR-Solar
      gen: http://tinyurl.com/LMR-Lister

        Comment

        • Sunking
          Solar Fanatic
          • Feb 2010
          • 23301
          #3
          You need a current regulator, not a voltage regulator.
          MSEE, PE

            Comment

            Previous template Next
            Working...