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Thread: LED resistor calculation . 47 ohm??

  1. #1

    Default LED resistor calculation . 47 ohm??

    I have a question.
    Calculate the resistance

    Other people ....recommends a 2W or greater 1 ohm resistor....
    So on to my question. After wiring everything for some reason I decided to revisit Olm's Law to triple check everything and this time my calculations came out different. Before wiring my LEDS to my sound board I want to make sure I have not goofed up.
    Sometimes. What time does the man use .47 ohms?

  2. #2

    Default

    What color of Led are you using? Also wich sound board? If you’re using the prizm (wich I am asuming from your previous threads) a .47 ohm resistor would work if you are using a green, blue, or royal blue Led.

  3. #3

    Default

    Quote Originally Posted by Orzr View Post
    I have a question.
    Calculate the resistance

    Other people ....recommends a 2W or greater 1 ohm resistor....
    So on to my question. After wiring everything for some reason I decided to revisit Olm's Law to triple check everything and this time my calculations came out different. Before wiring my LEDS to my sound board I want to make sure I have not goofed up.
    Sometimes. What time does the man use .47 ohms?
    ”Other people” will throw out “recommendations” like that when they are too lazy to actually do th calculations themselves.

    If you follow the tutorial that I had posted, you will be just fine. As others have said the .47 ohm resistor is good for blues and greens when you have a 3.7V battery source.
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    "Yeah, yeah, I've heard it all before... you want blindingly bright, super loud, running 1138 blinkies off of the cheapest sound card you can find AND you want all of it to run on a battery the size of a dime, and run for a very, VERY long time. That one cracks me up every time..."
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  4. #4

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