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  • Resistors – a little help
  • stevied
    Free Member

    So I’m wiring up a new front light for the bike and I’m using a switch with an LED in.
    I need to use a resistor between the switch and the power input..

    Resistor = (14.8v – 2.3v)/20mA = 625ohms.

    I’ve got a 1300 ohms resistor so
    a: can I use it?
    b: what difference would it make?

    Posted 7 years ago
    perchypanther
    Free Member

    what difference would it make?

    None.

    Futile, innit?

    Posted 7 years ago
    mrjmt
    Free Member

    it’ll mean your led receives approx 9.6mA instead of 20mA so may be a little dim.

    You could put two of your 1300R in parallel to give you 650R.

    Posted 7 years ago
    Del
    Full Member

    Futile, innit?

    bravo!

    Posted 7 years ago
    stevied
    Free Member

    You could put two of your 1300R in parallel to give you 650R.

    Like this?

    Posted 7 years ago
    zzjabzz
    Free Member

    This guy ^^^ has certainly done his ohmwork…

    Posted 7 years ago
    mrjmt
    Free Member

    yes

    Posted 7 years ago
    stevied
    Free Member

    Lovely, thanks 🙂

    Posted 7 years ago
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