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Thread: Planning First Build

  1. #1

    Default Planning First Build

    Hello all, I'm building my first saber. I want to start simple but with plenty of room for upgrades. I've attached a photo of a wiring guide and parts, I would appreciate any advice on my plan.

    Thank you for any and all comments!

    2015-09-22 07.03.47.jpg

  2. #2

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    A single li-ion cell will not power a BuckPuck properly. You need a minimum of 5v to run them. You could either use a 2-cell pack (7.4v) or swap your BuckPuck out for a resistor.

    Personally, I would use a resistor and the single li-ion. That way, it would be easier to add in a Nano Biscotte at a later date.
    We all have to start somewhere. The journey is all the more impressive by our humble beginnings.

    http://led.linear1.org/1led.wiz for the lazy man's resistor calculator!
    http://forums.thecustomsabershop.com...e-to-Ohm-s-Law for getting resistor values the right way!

  3. #3

    Default

    Given the option I would rather have the single cell 18650, have plenty of them already. What resistor would you recommend?

  4. #4

    Default

    Give a man a fish, or teach a man to fish...

    FJK has written a lovely tutorial that will teach you how to calculate your own resistor. http://forums.thecustomsabershop.com...e-to-Ohm-s-Law

    The math isn't that hard. You'll find the forward voltage value for your LED on the store page. There's also a resistor calculator in my signature, but it tends to round up values unnecessarily. It's good for double-checking your math to see if you're in the right ballpark.
    We all have to start somewhere. The journey is all the more impressive by our humble beginnings.

    http://led.linear1.org/1led.wiz for the lazy man's resistor calculator!
    http://forums.thecustomsabershop.com...e-to-Ohm-s-Law for getting resistor values the right way!

  5. #5

    Default

    I found the calculator. Correct me if I'm wrong. According to my plan,
    Source Voltage=3.7v
    Diode Forward Voltage=2.57v
    Diode Forward Current (mA)=1000mA

    The calculator output, 1.2 Watt capable or greater 1.2 ohm resistor.

    Will this resistor work?
    http://www.thecustomsabershop.com/12...istor-P22.aspx

  6. #6

    Default

    That will work fine. You can always use a higher wattage resistor than what is recommended, it won't affect the brightness of the LED. Don't go overboard unless you need to, since the 5-10W resistors are BIG and eat up precious hilt space.
    We all have to start somewhere. The journey is all the more impressive by our humble beginnings.

    http://led.linear1.org/1led.wiz for the lazy man's resistor calculator!
    http://forums.thecustomsabershop.com...e-to-Ohm-s-Law for getting resistor values the right way!

  7. #7

    Default

    I did the math provided by FJK (the calculation was easy, thanks)

    I got 1.13ohm and 1.13w.

    So going to a higher resistor won't affect the brightness, does it affect battery life?

  8. #8

    Default

    Higher wattage won't affect brightness or battery life. It just affects how much current can go through it at once before the magic smoke comes out. So long as you meet the calculated minimum, you're safe.

    Ohms will affect brightness and battery life. If you go lower, you overdrive the LED. The LED will run brighter and hotter, and you run the risk of blowing it out. If you go higher, the LED will be dimmer. We generally recommend the value closest to the calculated value, rounding up is preferred over rounding down.
    We all have to start somewhere. The journey is all the more impressive by our humble beginnings.

    http://led.linear1.org/1led.wiz for the lazy man's resistor calculator!
    http://forums.thecustomsabershop.com...e-to-Ohm-s-Law for getting resistor values the right way!

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