No announcement yet.

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

  • Filter
  • Time
  • Show
Clear All
new posts

  • 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.
    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



    • #3
      You need a current regulator, not a voltage regulator.
      MSEE, PE