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Author Topic: Need resistor help.  (Read 2349 times)

Offline Knightsofwar210

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Need resistor help.
« on: January 08, 2009, 07:54:43 AM »
Okay I'm getting these two leds -

http://unique-leds.com/index.php?target=products&product_id=1614 - red, I used a resistor calculator and it told me to get this resistor - 1/8W or greater 150 ohm resistor

http://unique-leds.com/index.php?target=products&product_id=1955 - green, I used a resistor calculator again and it tolde me to get this resistor - 1/8W or greater 56 ohm resistor

I'm hooking them up to 2 2.5 AA batteries so a total of 5V, I want to get the resistors from Unique-leds.com but they only have 1/4 resistors not 1/8 so can anyone help me? Link to the resistors page - http://unique-leds.com/index.php?target=categories&category_id=196

Thanks in advance!
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Offline 802Chives

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Re: Need resistor help.
« Reply #1 on: January 08, 2009, 01:05:10 PM »
1/8W = 0.125W

1/4W = 0.25W

0.25 > 0.125

The power rating on resistors is how much power they can dissipate before burning up. You mentioned the calculator suggested 1/8W or greater and since 1/4 > 1/8, the 1/4W resistor that you linked will be more than sufficient.
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Offline Knightsofwar210

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Re: Need resistor help.
« Reply #2 on: January 09, 2009, 09:52:46 AM »
Hey Thanks!  :tup:
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daryy

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Re: Need resistor help.
« Reply #3 on: January 11, 2009, 11:06:56 PM »
« Last Edit: January 20, 2009, 04:10:26 AM by daryy »
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