Author Topic: Resistor value  (Read 861 times)

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Offline jheatac

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Resistor value
« on: December 17, 2018, 03:18:00 pm »
Can someone please check me? This is a 57k 1% resistor, isn't it?

I'm a newbie working on an inverter and it seems to have some odd values...

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Online JFJ

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Re: Resistor value
« Reply #1 on: December 17, 2018, 04:09:40 pm »
It looks like a 47k 1% (if the last band is brown) or 2% (if the last band is red) resistor:

 
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Offline ElecSeb

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Re: Resistor value
« Reply #2 on: December 17, 2018, 06:06:14 pm »
 

Offline jheatac

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Re: Resistor value
« Reply #3 on: December 17, 2018, 08:30:00 pm »
Maybe my eyes are off....

I see

Green
Purple
Black
Red
Brown

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Offline coromonadalix

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Re: Resistor value
« Reply #4 on: December 17, 2018, 09:41:14 pm »
seems right

Green
Purple
Black
Red
Brown
 

Offline jheatac

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Re: Resistor value
« Reply #5 on: December 17, 2018, 11:05:59 pm »
Wouldn't that be a 57k? Which isn't a common value in 1%?

Is this 11k or 1.2k?

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Offline coromonadalix

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Re: Resistor value
« Reply #6 on: December 17, 2018, 11:21:36 pm »
Well you can take an meter to check and validate the colors

In 1% resistors you can have many stranges values, even in circuits you can have a rough idea ?
 

Offline ArthurDent

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Re: Resistor value
« Reply #7 on: December 18, 2018, 01:17:35 am »
I bought an inexpensive resistor kit on eBay from a good Chinese supplier and all the resistors I've checked, and I've used many, check out within the stated tolerance. One problem I have with all of them is the painted bands aren't strong primary colors so it is easy to run into the same problem you are having, guessing what the color is actually meant to be.
 

Offline Nerull

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Re: Resistor value
« Reply #8 on: December 18, 2018, 09:11:49 am »
Is this 11k or 1.2k?

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Brown Brown Black Red
    1         1        0    2

= 110 * 10^2 = 11k

Digikey doesn't stock a single 57k resistor, I would tend to suspect dodgy colors. Have you measured it?
« Last Edit: December 18, 2018, 09:16:22 am by Nerull »
 

Offline David Hess

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Re: Resistor value
« Reply #9 on: December 18, 2018, 08:08:38 pm »
I looks like 47.0k 1% but that is not a standard 1% value.
 

Offline perieanuo

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Re: Resistor value
« Reply #10 on: December 18, 2018, 08:13:03 pm »
47k of course.just some paint nuance problem


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Offline royarms

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Re: Resistor value
« Reply #11 on: December 26, 2018, 09:52:07 pm »
47k of course.just some paint nuance problem


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I agree, first band is yellow. The blue colored resistor makes it look close to green, but that looks yellow with a blue tint. Green band would be more green.

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Offline Chris56000

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Re: Resistor value
« Reply #12 on: December 28, 2018, 07:46:18 pm »
Hi!

The colour vision of my eyes is clear and accurate and I'm in no doubt about the resistor the OP posted–it's yellow – violet – black – red  – brown – red, which is 47k0 ±1% – there's no temp. co. band!

Chris Williams
« Last Edit: December 28, 2018, 07:49:50 pm by Chris56000 »
It's an enigma that's what it is!! This thing's not fixed because it doesn't want to be fixed!!
 

Offline jheatac

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Re: Resistor value
« Reply #13 on: December 28, 2018, 09:34:10 pm »
It is apparently a yellow... cheap yellow with blue behind it makes it look green.
 


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