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Thread: Parallel?

  1. #1
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    Parallel?

    Im having a hard time understanding something.....

    I am building a 3 bulb xml setup. 19.2v 2000mah battery and a 1000mv buckpuck. If I run the leds in parallel will they get the most power to them?

    From what I understand the upsides to parallel is the leds get more power to them but you need higher voltage to make it effecient by lowering the amps. Im not worried about the fluctuations in the individual leds because they arent even close to being driven to the limits.

    I just dont see the advantages of running series in my application (Bar light). I have done alot of searching and reading but its just not clicking.

  2. #2
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    In parallel each would see 1/3 of the current so around 333mA. Going to be a little dim.
    Wire the leds in series and each one will see 1000mA. Your forward voltage (resistance) will be around 10volts.
    Closer to your battery voltage and makes for a more efficient system.

  3. #3
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    yep read odtexas's post, you have parallel and series backwards.
    I WANT TO BUY YOUR MAGICSHINE LIGHTS! Working or not.

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    Thanks tex.

    One more question....

    I need at least 10v to test this out because the voltage has to be higher on the battery side of the buck puck than the forward voltage of the leds. Correct?

  5. #5
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    Quote Originally Posted by dynomight View Post
    Thanks tex.

    One more question....

    I need at least 10v to test this out because the voltage has to be higher on the battery side of the buck puck than the forward voltage of the leds. Correct?
    You need around 2 volts above your LED total voltage.

    See the datasheet.

    Edit
    Alternatively download documentation from Luxdrive here.
    Last edited by znomit; 07-09-2011 at 11:47 PM. Reason: added link to keep Emu happy
    DIY LED Bike Lights:
    A few Dynamo builds and some Small battery lights

  6. #6
    help with the zip please
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    znomit, not sure what data sheet you linked but when I went to look at it I got a virus warning. Might just be a standard warning but thought I'd mention it just the same.

  7. #7
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    Quote Originally Posted by emu26 View Post
    znomit, not sure what data sheet you linked but when I went to look at it I got a virus warning. Might just be a standard warning but thought I'd mention it just the same.
    Auto download link I guess.
    From here
    http://www.ledsupply.com/buckpuck.php
    DIY LED Bike Lights:
    A few Dynamo builds and some Small battery lights

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