Author Topic: resistor help  (Read 4452 times)

Offline RobTapps

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resistor help
« on: January 06, 2009, 02:01:54 AM »
ok so in the other thred i made i said i needed the capacitor and resistors off the mic.'s board.. well i broke it.. after searching mouser for a bit i found a picture of what i need but its not exact..

the picture is a 100 i need a 103.. any one who knows where to find this on mouser or any one who has 1 extra i will pay for it and a postage stamp...

or any one who can tell me how to find it by the model # that would also be awesome (not all of them have pics. and the ones that do all have the same one..

Offline GhoSt

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Re: resistor help
« Reply #1 on: January 06, 2009, 03:46:51 AM »
correct me if im wrong but I thought marking of 100 on smt is 10ohms so you wanting a 10.3 ohm resistor?
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Offline RobTapps

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Re: resistor help
« Reply #2 on: January 06, 2009, 01:56:57 PM »
i donno you tell me.. im not pro with all these smd things lol

Offline DubbleDutch

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Re: resistor help
« Reply #3 on: January 06, 2009, 03:00:55 PM »
the resistor is correct ;)

you can also use a normal resistor, not a smd one ;) it will fit just fine ;)



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Offline RobTapps

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Re: resistor help
« Reply #4 on: January 06, 2009, 03:33:01 PM »
so it has to be a 10.3 ohm resistor?

Offline DubbleDutch

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Re: resistor help
« Reply #5 on: January 06, 2009, 03:50:58 PM »
10ohm is ok ;)



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Offline alentris

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Re: resistor help
« Reply #6 on: January 06, 2009, 04:15:44 PM »
Yeah, .03 Ohms is a miniscule amount of resistance, so It shouldn't affect any operation if you buy the 10 ohms. But be warned, an smt resistor is a :censored: of alot harder to solder than a regular one.

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Offline LaCozTe-2028

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Re: resistor help
« Reply #7 on: January 06, 2009, 05:17:48 PM »
Thats if you dont have the right tools if you have the right tools it should be fairly easy to solder it

try droping it again
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Offline bustinthejustin

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Re: resistor help
« Reply #8 on: January 06, 2009, 05:31:45 PM »
Depending on the size of the smd resistor, it's usually easier than an smd led...

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Offline psp339

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Re: resistor help
« Reply #9 on: January 06, 2009, 06:42:57 PM »
If the last number is always a decimal, does it mean the 10 ohm smd resistors I bought are 1ohm? Someone told me they were the right ones for the trigger mod so I bought them. I used them but something went wrong and there is no more power for the led forever...

Offline RobTapps

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Re: resistor help
« Reply #10 on: January 06, 2009, 07:46:29 PM »
well here is what the headphone board looked like... not including the mic off switch and the headphone volume dial..




so im thinking its like an amp for the mic..?? i really dont know much about this stuff.. but im sure i can learn

Offline bustinthejustin

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Re: resistor help
« Reply #11 on: January 06, 2009, 07:59:24 PM »
If the last number is always a decimal, does it mean the 10 ohm smd resistors I bought are 1ohm? Someone told me they were the right ones for the trigger mod so I bought them. I used them but something went wrong and there is no more power for the led forever...

Maybe. What do you mean no power for the led? As in the led blew? I really don't know for sure but it is my assumption. 1 sec I'll google it.

Edit: Wait found the answer.

Surface mounted resistors are printed with numerical values in a code related to that used on axial resistors. Standard-tolerance Surface Mount Technology (SMT) resistors are marked with a three-digit code, in which the first two digits are the first two significant digits of the value and the third digit is the power of ten (the number of zeroes). For example:

"334" = 33 × 10,000 ohms = 330 kilohms
"222" = 22 × 100 ohms = 2.2 kilohms
"473" = 47 × 1,000 ohms = 47 kilohms
"105" = 10 × 1,000,000 ohms = 1 megohm

Resistances less than 100 ohms are written: 100, 220, 470. The final zero represents ten to the power zero, which is 1. For example:

"100" = 10 × 1 ohm = 10 ohms
"220" = 22 × 1 ohm = 22 ohms

Sometimes these values are marked as "10" or "22" to prevent a mistake.

Resistances less than 10 ohms have 'R' to indicate the position of the decimal point (radix point). For example:

"4R7" = 4.7 ohms
"0R22" = 0.22 ohms
"0R01" = 0.01 ohms

Precision resistors are marked with a four-digit code, in which the first three digits are the significant figures and the fourth is the power of ten. For example:

"1001" = 100 × 10 ohms = 1 kilohm
"4992" = 499 × 100 ohms = 49.9 kilohm
"1000" = 100 × 1 ohm = 100 ohms

"000" and "0000" sometimes appear as values on surface-mount zero-ohm links, since these have (approximately) zero resistance.

« Last Edit: January 06, 2009, 08:01:27 PM by bustinthejustin »

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Offline psp339

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Re: resistor help
« Reply #12 on: January 06, 2009, 08:03:33 PM »
Maybe. What do you mean no power for the led? As in the led blew? I really don't know for sure but it is my assumption. 1 sec I'll google it.

Edit: Wait found the answer.

Surface mounted resistors are printed with numerical values in a code related to that used on axial resistors. Standard-tolerance Surface Mount Technology (SMT) resistors are marked with a three-digit code, in which the first two digits are the first two significant digits of the value and the third digit is the power of ten (the number of zeroes). For example:

"334" = 33 × 10,000 ohms = 330 kilohms
"222" = 22 × 100 ohms = 2.2 kilohms
"473" = 47 × 1,000 ohms = 47 kilohms
"105" = 10 × 1,000,000 ohms = 1 megohm

Resistances less than 100 ohms are written: 100, 220, 470. The final zero represents ten to the power zero, which is 1. For example:

"100" = 10 × 1 ohm = 10 ohms
"220" = 22 × 1 ohm = 22 ohms

Sometimes these values are marked as "10" or "22" to prevent a mistake.

Resistances less than 10 ohms have 'R' to indicate the position of the decimal point (radix point). For example:

"4R7" = 4.7 ohms
"0R22" = 0.22 ohms
"0R01" = 0.01 ohms

Precision resistors are marked with a four-digit code, in which the first three digits are the significant figures and the fourth is the power of ten. For example:

"1001" = 100 × 10 ohms = 1 kilohm
"4992" = 499 × 100 ohms = 49.9 kilohm
"1000" = 100 × 1 ohm = 100 ohms

"000" and "0000" sometimes appear as values on surface-mount zero-ohm links, since these have (approximately) zero resistance.


I mean that the motherboard doesn't give power to the power LED anymore.

Offline RobTapps

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Re: resistor help
« Reply #13 on: January 06, 2009, 08:43:19 PM »
Maybe. What do you mean no power for the led? As in the led blew? I really don't know for sure but it is my assumption. 1 sec I'll google it.

Edit: Wait found the answer.

Surface mounted resistors are printed with numerical values in a code related to that used on axial resistors. Standard-tolerance Surface Mount Technology (SMT) resistors are marked with a three-digit code, in which the first two digits are the first two significant digits of the value and the third digit is the power of ten (the number of zeroes). For example:

"334" = 33 × 10,000 ohms = 330 kilohms
"222" = 22 × 100 ohms = 2.2 kilohms
"473" = 47 × 1,000 ohms = 47 kilohms
"105" = 10 × 1,000,000 ohms = 1 megohm

Resistances less than 100 ohms are written: 100, 220, 470. The final zero represents ten to the power zero, which is 1. For example:

"100" = 10 × 1 ohm = 10 ohms
"220" = 22 × 1 ohm = 22 ohms

Sometimes these values are marked as "10" or "22" to prevent a mistake.

Resistances less than 10 ohms have 'R' to indicate the position of the decimal point (radix point). For example:

"4R7" = 4.7 ohms
"0R22" = 0.22 ohms
"0R01" = 0.01 ohms

Precision resistors are marked with a four-digit code, in which the first three digits are the significant figures and the fourth is the power of ten. For example:

"1001" = 100 × 10 ohms = 1 kilohm
"4992" = 499 × 100 ohms = 49.9 kilohm
"1000" = 100 × 1 ohm = 100 ohms

"000" and "0000" sometimes appear as values on surface-mount zero-ohm links, since these have (approximately) zero resistance.



so 103 would be..

"103" = 10 x 3 ohm = 30 ohms?

or would it be...

"103" = 10 x 4 ohm = 40 ohms?

because if 0 = x 1 would 3 be x 4 ??

Offline bustinthejustin

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Re: resistor help
« Reply #14 on: January 06, 2009, 09:05:07 PM »
It's the power of 10. So 3 would be 10x10x10=1000
10x1000=10kohm. Easy way to think of it is first two numbers followed by x amount of zeroes.


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Offline RobTapps

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Re: resistor help
« Reply #15 on: January 06, 2009, 09:18:19 PM »
lol its gonna be funny as :censored: when i go to radio shack and ask if they have 10kohm resistors.. there gonna be like "huh?"

Offline PhenomenalDesigns

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Re: resistor help
« Reply #16 on: January 07, 2009, 11:43:54 AM »
lol its gonna be funny as :censored: when i go to radio shack and ask if they have 10kohm resistors.. there gonna be like "huh?"
10K Ohm resistors are very common actually, they will know what your talking about

If you want to make them confused, ask for "10K SMD 0603/1206(which ever one your after) Resistors with 1% Or less tolerance"


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Offline RobTapps

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Re: resistor help
« Reply #17 on: January 07, 2009, 02:39:17 PM »
ok well i was unsoldering a clock last night (cause it has some salvagable resistors in it..) and i dont know if i inhaled some solder smoke or what cause i got hella hot/cold flashes.. i couldnt sleet.. my stomach/chest felt funny...(like i was gonna puke) so i went to the bathroom to be safe and i started convulsing.. like having a seasure* but i was like fully concious*... so i looked up lead posioning* symptoms and those were all there but im not sure if thats what it was..??

if im using a regular resistor..




would i need...

brown(1), black(0), orange(000), gold(5%)?


Offline bustinthejustin

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Re: resistor help
« Reply #18 on: January 07, 2009, 03:01:27 PM »
No regular resistors are different.

http://wiki.xtronics.com/index.php/Resistor_Codes

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Offline rceckspurt13

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Re: resistor help
« Reply #19 on: January 07, 2009, 03:29:47 PM »
The one marked D1 is a diode I believe.
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Offline RobTapps

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Re: resistor help
« Reply #20 on: January 07, 2009, 03:55:34 PM »
ok so i think i found one that will work.. i mesured it on the multimeter on 20k and it came out as 1.01... or would i need it to be 10.01 ?

Offline RobTapps

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Re: resistor help
« Reply #21 on: January 07, 2009, 06:21:51 PM »
The one marked D1 is a diode I believe.

yea i have been reading up on this stuff.

Offline bustinthejustin

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Re: resistor help
« Reply #22 on: January 07, 2009, 07:00:04 PM »
ok so i think i found one that will work.. i mesured it on the multimeter on 20k and it came out as 1.01... or would i need it to be 10.01 ?

It would need to measure atleast 10, if you're looking for a 10k resistor. Also, edit your posts and don't double post.

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Offline RobTapps

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Re: resistor help
« Reply #23 on: January 07, 2009, 08:36:57 PM »
ahh ok.. and srry.. what if i used a bunch till they add up to 10?

 

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