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Thread: Ohms law/resistance calculators

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    Default Ohms law/resistance calculators

    Gday, I'm wondering if there's any good websites or apps that are good for things like ohms law, resistor colour codes and things like that? Because whilst I do sort of understand the concepts, I'm not very good at the maths side of it. Any links would be appreciated.

    Cheers, Gab



Look Here ->
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    Back in the 70's I was taught this resistor color code and I still remember it..

    Bad
    Beer
    Rots
    Our
    Young
    Guts
    But
    Vodka
    Goes
    Well
    Last edited by Johnno; 02-11-20 at 10:03 AM.

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    My Memoir was a little more racy
    Bad
    Boys
    Rape
    Our
    Young
    Girls
    But
    Violet
    Gives
    Willingly

    Learnt that in 1959 at the PMG Technicians Training School in Adelaide.
    Sorry for leaving out yellow.
    Last edited by gordonwh40; 04-11-20 at 03:26 PM.

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    Quote Originally Posted by gordonwh40 View Post
    My Memoir was a little more racy
    Bad
    Boys
    Rape
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    Girls
    But
    Violet
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    Willingly

    Learnt that in 1959 at the PMG Technicians Training School in Adelaide.
    They were still teaching it there in the 70's which is where I learnt it too.
    I'm out of my mind, but feel free to leave a message...

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    Quote Originally Posted by gordonwh40 View Post
    My Memoir was a little more racy
    Bad
    Boys
    Rape
    Our
    Girls
    But
    Violet
    Gives
    Willingly

    Learnt that in 1959 at the PMG Technicians Training School in Adelaide.
    You missed yellow = 4

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    LOL.. I noticed that too... Old Farts.. /jk

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    Quote Originally Posted by Johnno View Post
    LOL.. I noticed that too... Old Farts.. /jk
    lol...it's funny seeing that, and recalling oneself saying the same thing when young, to those elders which one has now become, and then when one gets here you flip it around, and joke about young whipper-snappers =^)

    A tiny jingle for you old mate, that still roams my head;

    "green bar green, orange bar blue
    blue bar orange, brown bar brown"


    Wrt resistor colour codes, there's lot of trivia that has transmogrified IRL, into freelance rework jobs that have hit my bench over years passed -- example:

    trivia = which 4, 5 and 6 band colour coded resistor values, read the same if read back to front?
    which resistor values, are most commonly mistaken for being read back to front, and being used in place of the correct value?
    which resistor colour code values, are most commonly misread due to bad pigments and observer's eye colour acuity?

    IRL = 1000s of PCBs over the years that don't work post wave-soldering, due to 1 or 2 resistors of the wrong value having been stuffed into the PCBs, usually 2 resistors in swapped locations. I should say to the above, some resistor markings are worse than others, when it comes to the contrast of the background colour (resistor body) and the colour/tint of the bands themselves. These jobs were nice little earners back in the thru-hole days =)

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    shit, I guess I'm just lazy & use my Ohm meter to determine the resistance value.

    I have found some that are out of spec according to their colour value; so stopped relying on that.
    Cheers, Tiny
    "You can lead a person to knowledge, but you can't make them think? If you're not part of the solution, you're part of the problem.
    The information is out there; you just have to let it in."

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    Quote Originally Posted by Johnno View Post
    Back in the 70's I was taught this resistor color code and I still remember it..

    Bad
    Beer
    Rots
    Our
    Young
    Guts
    But
    Vodka
    Goes
    Well
    In the 60s we learned

    Black
    Bastards
    Root
    Our
    Young
    Girls
    But
    Virgins
    Go
    West

    Gab250, One little memory jogger we used to help get the formula the right way around was: Volts push Amps thru Ohms.
    Last edited by RogerTheDoger; 07-11-20 at 07:23 PM.

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