12dcv to 2dcv with Zener Diodes?

Discussion in 'The Projects Forum' started by pointblank9957, Dec 30, 2012.

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  1. pointblank9957

    Thread Starter New Member

    Dec 30, 2012
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    Ok heres the dilema, i have over 220 3mm leds, each are rated @ 2.1v & 20mA. I'm going to be running them with a relay. To reduce the voltage, would i need 2v .5a Zener Diodes? The leds are all in parallel, totalling 4.4a draw. So i would need 9 .5a 2v Zeners in parallel from the source? Zeners are very cheap (25 for $.99) and i bought the leds (1100 for $15)
     
  2. bertus

    Administrator

    Apr 5, 2008
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