# 12dcv to 2dcv with Zener Diodes?

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#### pointblank9957

Joined Dec 30, 2012
2
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)

#### bertus

Joined Apr 5, 2008
21,761
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