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How many LED's??

Discussion in 'LEDs and Optoelectronics' started by matt_tech, Jan 11, 2011.

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  1. matt_tech

    matt_tech

    1
    0
    Jan 11, 2011
    How many LED's can I run off of a 9v battery?

    Led's are drawing approx 30mA.

    Thanks

    Matt
     
  2. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    Red/yellow/green, or blue/white LED's? And for how long do you want the battery to last?

    Please also have a look in the sticky in Electronic Projects.
     
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