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50 LED lights installment / power supply and resistors help

Discussion in 'LEDs and Optoelectronics' started by tkoptur1, Sep 22, 2012.

  1. tkoptur1

    tkoptur1

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    Sep 22, 2012
    Hello guys,

    I am having some trouble with my LED lights. I am thinking to solder about 50 LED lights (3V, 20MA, 5mm each) and install them to my keyboard. I was thinking to use my keyboard's card but seems like it does not give enough power. I have tried with one LED light bulb, it worked fine but after I solder 2 together, it seemed like it lost its power about half. So If I go over 2, it wont work. I am looking for some resistors and power supplies to fix this problem but I am not sure what volt to choose for the power supply and what resister to choose. Can some one help me please?

    Do I have to use resistors or just a parallel wiring should be ok? Can I use a computer's power supply or would it be too much?

    Thank you,
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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  3. tkoptur1

    tkoptur1

    2
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    Sep 22, 2012
    Thank you, I will check it now.
     
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