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  1. #1
    Code Burr
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    Regulator or Resistor?

    I could use a little help setting up this tail light. I just burnt up a buck toot somehow so I thought i'd make my own. I have a 6v battery powering a xr-e. Instead of the buck toot I thought i'd try a resistor. From this page LED calculator for single LEDs I calculated a 10ohms 2w resistor will regulate me to 3v/300mah. Can anyone check my logic or math here? Should I add a 3v regulator and change the resistor?

  2. #2
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    Assuming you have a white XRE ( I think they are available in red?) 10 ohms will work. It will have poor efficiency as the resistor dissipates the excess energy as heat.

  3. #3
    Code Burr
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    Its actually a red XRE. I can throw a 3v regulator in and use a different resistor if that would be more efficient. I was trying to keep it simple.

  4. #4
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    You would need a 15 ohm resistor for a red XRE. Best solution is to replace the buck driver.

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