Hi, may i request a 1.2V nimh solar battery FLASHING charger ?

Discussion in 'The Projects Forum' started by TYYang, Apr 12, 2015.

  1. TYYang

    Thread Starter New Member

    Apr 3, 2015
    18
    0
    I need the circuit....I find and test a lot circuit from online, but i still unable to get a proper solar 1.2V LED monitoring battery charging circuit. I hope someone help me solve my problem, thank you very much

    my solar panel is around 3-8V input
    rechargeable battery AA/AAA 1200mah/3000mah
     
  2. Denesius

    Member

    Feb 5, 2014
    89
    14
    I'm not sure what you mean by 'monitoring', but I think you're looking at converting the solar output into battery charging current
    There are a number of switching buck regulators that can do this, with a minimal component count. A cheap regulator is the LM2576-Adj (find data sheet here: http://www.ti.com/lit/ds/symlink/lm2576.pdf). You can set it up to convert your solar panel output down to a steady 1.20-1.25 volts (from 3-8 volts), and the output can be as much as 1 amp/hour (assuming your solar panel can output that much), which would charge your batteries nicely
     
  3. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    1,758
    98
    Looks like a continuation of the OPs homework thread.
     
  4. TYYang

    Thread Starter New Member

    Apr 3, 2015
    18
    0

    Actually i wish to have a circuit which can show the charging status of battery.
    For example:
    1) fully charge - LED off, charging - LED on
    or
    2) fully charge - Red LED on, charging- Green LED on
     
  5. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    what can I say? o_O:confused:
     
  6. TYYang

    Thread Starter New Member

    Apr 3, 2015
    18
    0
    sad... unable to build the circuit
     
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