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#1
Jul 1 2016 05:40pm
I have a bag of 3v white LED bulbs (standard)

I want to power these from a 12v battery (i did this before a long time ago on my previous car)

can i run multiple banks of 4 without any resistors since 4 x 3 = 12?

last time remember that i used resistors for banks of 4 - not entirely sure if i needed to.
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#2
Jul 1 2016 05:41pm
not that I know of... amps divide.. volts remain

if you know what i mean

This post was edited by FedOx on Jul 1 2016 05:42pm
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#3
Jul 1 2016 05:45pm
Quote (FedOx @ Jul 1 2016 11:41pm)
not that I know of... amps divide.. volts remain

if you know what i mean



meaning that a bank of 3v leds still = 3v?

therefore 3 x 3 = 3, 12v - 3v = 9v,

at 25 ma = 360 ohms?

This post was edited by bloodmeal on Jul 1 2016 05:45pm
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#4
Jul 1 2016 05:48pm
Quote (bloodmeal @ 1 Jul 2016 23:45)
meaning that a bank of 3v leds still = 3v?

therefore 3 x 3 = 3, 12v - 3v = 9v,

at 25 ma = 360 ohms?


yep.. volts always remain the same regardless
amps divide it by the amount/quanity of shit you got connected
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#5
Jul 2 2016 07:34pm
crash landed another question let it all burn!
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#6
Jul 3 2016 06:06am
Quote (bloodmeal @ Jul 1 2016 11:45pm)
meaning that a bank of 3v leds still = 3v?

therefore 3 x 3 = 3, 12v - 3v = 9v,

at 25 ma = 360 ohms?


Just use a zod so they don't break.
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#7
Jul 3 2016 06:20am
circuit serie : volt divides, current remains the same
parallel : current divide, volt remains the same
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