what resistor with LED

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URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=2168
Printed Date: June 07, 2024 at 4:14 PM

Topic: what resistor with LED

Posted By: rbf351
Subject: what resistor with LED
Date Posted: July 23, 2002 at 6:41 PM

i'm getting 120 Siemens Hyper Bright Orange LEDs. LO 5436 to use on my car

how do i know what resistor to use with it so i don't burn the LED's up? i'm not sure how may i'm going to use

Replies:

Posted By: Big Dog
Date Posted: July 24, 2002 at 2:14 PM

Hey rbf351,

Not knowing what voltage the LED works at, we'll have to guess. If you have a selection of resistors then start with the largest value and work your way down being careful not to exagerate the current. posted_image

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Prepare your future. It wasn't the lack of stones that killed the stone age.

Posted By: rbf351
Date Posted: July 26, 2002 at 9:50 AM

i found some info on the LEDS

Foward Current 30 Ma

power consumption 80 mW

hope this help, i'm new at this and have no clue what resistors to use

i have 900 resistors with the following values

1/4w 1 ohm 1% - 50 pieces on tape

1/4w 15 ohm 1% - 50 pieces on tape

1/4w 39.2 ohm 1% - 50 pieces on tape

1/4w 51.1 ohm 1% - 50 pieces on tape

1/4w 562 ohm 1% - 50 pieces on tape

1/4w 665 ohm 1% - 50 pieces on tape

1/4w 909 ohm 1% - 50 pieces on tape

1/4w 1.33k ohm 1% - 50 pieces on tape

1/4w 2.49k ohm 1% - 50 pieces on tape

1/4w 7.5k ohm 1% - 50 pieces on tape

1/4w 15k ohm 1% - 50 pieces on tape

1/4w 12.1k ohm 1% - 50 pieces on tape

1/4w 4.75k ohm 1% - 50 pieces on tape

1/4w 33.2k ohm 1% - 50 pieces on tape

1/4w 28k ohm 1% - 50 pieces on tape

1/4w 53.6k ohm 1% - 50 pieces on tape

1/4w 169k ohm 1% - 50 pieces on tape

1/4w 301k ohm 1% - 50 pieces on tape

Posted By: mobiletoys2002
Date Posted: July 26, 2002 at 9:59 AM

333 ohm resistor will give you 2 volts a 300 ohm resistor will give you 3 volts posted_image

within 10 %of this will give those voltages

Posted By: trusdamanr
Date Posted: July 30, 2002 at 12:30 PM

resistance=voltage/current