LED Resistor Question
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From: Backroads between Pinole and Concord ;)
LED Resistor Question
Hey guys hopefully a quick question...
I am installing two 3mm leds in my door handles. The LEDs are 3mm rated 2VF @ 20mA. I made a mistake of buying 330 ohm resistors instead of 430 ohm. My question is can I solder two 330 resistors together to safely power the two LEDs? Did a few google searches and seems like I can but just wanted to run it by you guys to hear thoughts and opinions
I am installing two 3mm leds in my door handles. The LEDs are 3mm rated 2VF @ 20mA. I made a mistake of buying 330 ohm resistors instead of 430 ohm. My question is can I solder two 330 resistors together to safely power the two LEDs? Did a few google searches and seems like I can but just wanted to run it by you guys to hear thoughts and opinions
Joined: Feb 2013
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From: FL
Yes if you put 2 - 330 ohm resistors in series, you will have 660 ohms.
That will give you 15mA through your LEDs.
Solve by
(V_source - v_led) / resistance = current
(12-2)/660 = .01515
=15mA
The 330ohm by itself would give you 30mA
Edit I just saw you want to install 2 LEDs in each door.
(12-4) / 330 = 24mA
(12-4) / 660 = 12.1mA
That will give you 15mA through your LEDs.
Solve by
(V_source - v_led) / resistance = current
(12-2)/660 = .01515
=15mA
The 330ohm by itself would give you 30mA
Edit I just saw you want to install 2 LEDs in each door.
(12-4) / 330 = 24mA
(12-4) / 660 = 12.1mA
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