re-charge Ready Led Working Lamp

Discussion in 'Homework Help' started by MingJae, Dec 8, 2012.

  1. MingJae

    Thread Starter New Member

    Feb 19, 2010
    13
    0
    hello AAC!
    I am zero in electricy things and I need u'r help here,
    and sorry if my English isn't good enough. lol

    i'm in spare time doing an experiment, i want to make a portable working lamp which can be clipped to a window frame or desk as a table lamp to,
    this include:

    -trichip smd5050 12v led 30module (90leds) @0.24volt, 21.6watt in total
    -a box in dimension of 20x20x4cm

    -the total cost is under $30 exclude the leds, box, and DC converter

    What I will do is connect a 2Amp 12v DC adapter with 2.5m wire long to a wall socket to light up my led's , but I realize that my working lamp won't work if there's no electricity or wall socket.

    so, i modify the idea which the lamp will also work with batteries but i don't know how it will works with wall socket to.

    the concept is similar to a notebook while charging,
    we plug the notebook's adapter and we work with the notebook,
    and 2hrs later we unplug the adapter and we still can work for the next 2hrs without turning off the notebook.

    Can anybody sketch me the diagram for my working lamp?
    and what items should i buy and fit in 4cm space under 30$?

    really appreciate all u'r replies.. thx :)
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Hello !:)

    Can u tell me or show me this LED module first.
     
  3. MingJae

    Thread Starter New Member

    Feb 19, 2010
    13
    0
    oh hi!
    thx for u'r reply

    I will use a standard LED striplight, i'll cut them from 300LEDs/5meters roll,
    cutable every 5cm @3pcs LEDs(3led chips),
    its about 150cm long for 90LEDs
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,750
    760
    Then U will need 12V to light each strip , right?
    Do u know how much current a strip draws?
     
  5. MingJae

    Thread Starter New Member

    Feb 19, 2010
    13
    0
    yes 12v DC to light on the led,
    and i will divide them into 2 strips, 45leds each strip
    0.24watt/ledx45= 10.8watt per strip

    is there any way to light them up with and without home supply?

    thx
     
  6. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,750
    760
    oh , boy!!
    I am having a bit of trouble trying to understand what u are saying.

    Guys?
     
  7. MingJae

    Thread Starter New Member

    Feb 19, 2010
    13
    0
    uhmm.. haha sry, my bad english..

    the point is, how to turn ON 2xLED lamps (12v DC lamps, 10.8watt each)
    which include 220v(wall socket) and 12v(batteries) as their energy supply.

    portable mode--> using batteries (12volt), and
    non-portable condition--> using home electricity (220v)

    but it works like a laptop while charging, so we do not have to switch a button to AC mode or DC mode..

    thx

     
  8. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    760
    Aaaah! I am drowning here guys. !
     
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