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  • Resistors in parallel

    From Dan Green@21:1/5 to All on Tue Jul 25 19:59:09 2023
    Hi guys,

    I need to make up a 15k 4 Watt resistor from a selection of half Watt
    resistors in parallel. But the math is a bit complex for me. Any ideas
    how I could do this please? I'm relatively new to electronics. I have
    a ton of half watters to use so any values you come up with I shou,d
    have

    TIA

    Dan

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  • From DJ Delorie@21:1/5 to All on Tue Jul 25 15:18:40 2023
    Same resistors in parallel divide... for 4 watts out of 0.5 watters you
    need eight resistors, so 8x the value: 8 * 15k = 120K

    (because 8 120k resistors in parallel, divide by 8, is 15k)

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  • From Dan Green@21:1/5 to DJ Delorie on Tue Jul 25 20:50:52 2023
    On Tue, 25 Jul 2023 15:18:40 -0400, DJ Delorie <dj@delorie.com> wrote:


    Same resistors in parallel divide... for 4 watts out of 0.5 watters you
    need eight resistors, so 8x the value: 8 * 15k = 120K

    (because 8 120k resistors in parallel, divide by 8, is 15k)

    Superb! Many htankss!

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  • From Ralph Mowery@21:1/5 to All on Wed Jul 26 13:59:54 2023
    In article <8s90ci1ghb40pef22nofi1s7ddgbdg86u8@4ax.com>, dhg99908
    @hotmail.se says...


    Same resistors in parallel divide... for 4 watts out of 0.5 watters you >need eight resistors, so 8x the value: 8 * 15k = 120K

    (because 8 120k resistors in parallel, divide by 8, is 15k)

    Superb! Many htankss!



    Same resistors in series or parallel is just the simple multiplyer or devidisin.

    Same with capacitors except the mul and devide is reversed.

    It only falls into that long drawn out formular of the recipical of the recipical for more than 2 or the product over the sum for 2 of different values.

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