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Electronics expert help needed.. i.d. resistor #3004345
01/11/22 08:51 PM
01/11/22 08:51 PM
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roadrunninMark Offline OP
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I need some help from an electronics expert. I need to replace some resistors on my Christmas light decorations. We had a monster rain storm and my plugs got submerged; blowing fuses and burning out my led decorations. All the non led decorations are back to normal.

For the leds: I've replaced the burned out leds on one of my light strings, until I came across the leds that have a resistor on them. Below is a pic of one (5mm led). There are a total of 4 of these leds with the resistors attached (connected to the + side and looks like brown, green, and orange stripes), with a total of 75 leds for the decoration (all on one plug). The leds the farthest away from the plug survived so I did not change those.

Can someone tell me what resistor it is so I can get some new ones? Also, where is the best place to get? I got the replacement leds from Amazon. I have 2 more led type decorations to repair, which have different bulbs and one is a color changing set I need to figure out. I will probably have more questions when I get to that set.

Thanks,

Mark

resistor.jpg
Re: Electronics expert help needed.. i.d. resistor [Re: roadrunninMark] #3004364
01/11/22 09:32 PM
01/11/22 09:32 PM
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Google "resistor color bands" for more choices or go here Resistor Color band calculator
And that is probably an 1/8 watt resistor beer

Re: Electronics expert help needed.. i.d. resistor [Re: TJP] #3004371
01/11/22 09:44 PM
01/11/22 09:44 PM
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Sniper Offline
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Bad boys race our young girls behind victory garden walls. get started now

Black - 0
Brown - 1
red - 2
orange -3
yellow - 4
green - 5
blue - 6
violet - 7
gray - 8
white - 9

gold - 5
Silver 10%
none - 20%

so brown green and orange is 15000 ohm, or 15k ohms +/- 20%

Re: Electronics expert help needed.. i.d. resistor [Re: Sniper] #3004373
01/11/22 09:54 PM
01/11/22 09:54 PM
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DrCharles Offline
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Maybe it's the picture, but it looks to me like orange, green, brown, gold (first band at the right side of the pic).
That would be 350 ohm 5%... shruggy

Re: Electronics expert help needed.. i.d. resistor [Re: DrCharles] #3004481
01/12/22 09:24 AM
01/12/22 09:24 AM
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It could be gold too. It is so small I am using those glasses to try to increase the image to identify it. I used to have a magnifying glass but can't remember where it might be.

Where is a good place to buy these?

** Added 2 more pics using a stronger pair of glasses to magnify. **


resistor2.jpgresistor3.jpg
Last edited by roadrunninMark; 01/12/22 10:34 AM.
Re: Electronics expert help needed.. i.d. resistor [Re: Sniper] #3004482
01/12/22 09:26 AM
01/12/22 09:26 AM
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Originally Posted by Sniper
Bad boys race our young girls behind victory garden walls. get started now

Black - 0
Brown - 1
red - 2
orange -3
yellow - 4
green - 5
blue - 6
violet - 7
gray - 8
white - 9

gold - 5
Silver 10%
none - 20%

so brown green and orange is 15000 ohm, or 15k ohms +/- 20%


LOL..I like the Politically Correct version.....probably one of the few things I remember from my EE education days is the CORRECT version of the color code...but the non-PG version


Never, ever argue with an IDIOT. They will drag you to their level and then beat you with their years of experience
Re: Electronics expert help needed.. i.d. resistor [Re: oldjonny] #3004486
01/12/22 09:29 AM
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I was taught that version, too.

Re: Electronics expert help needed.. i.d. resistor [Re: Sniper] #3004506
01/12/22 10:35 AM
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I zoomed in on the phone and it does show a gold line on the resistor. All 4 are the same.. Looks like doc is correct: Great catch Doc! Is TJP correct, 1/8 watt?

Originally Posted by DrCharles
Maybe it's the picture, but it looks to me like orange, green, brown, gold (first band at the right side of the pic).
That would be 350 ohm 5%... shruggy

Last edited by roadrunninMark; 01/12/22 11:07 AM.
Re: Electronics expert help needed.. i.d. resistor [Re: roadrunninMark] #3004540
01/12/22 12:35 PM
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I'll agree on the 350 Ohm 5 %. Wattage? they do make a 1/16 w resistor don't know is they make anything smaller in a carbon film ? the size should tell you the wattage. if in doubt and you have the space bigger is better smile

Silly question grin Have you tried measuring THEM with a DVM. Maybe they are OK?

And to the other posters everybody liked Violet wink biggrin

Last edited by TJP; 01/12/22 12:56 PM.
Re: Electronics expert help needed.. i.d. resistor [Re: TJP] #3004549
01/12/22 12:54 PM
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I did not measure them as I do not no how to do that. I am just assuming they are shot since so many of the leds were burnt out. The leds that the resistors are attached to are not working, I did try those.

The only tool I have is a 7 function digital multimeter from harbor freight.. https://www.harborfreight.com/7-function-digital-multimeter-63759.html

Is this the tool to use to test them?

Re: Electronics expert help needed.. i.d. resistor [Re: roadrunninMark] #3004712
01/12/22 07:15 PM
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TJP, you are correct, 1/8 watt! Now I know what to look for...

Watched youtube on testing resistors....2 don't show any reading and one 180ish, the other 350ish. Sounds like one survived, one is "wounded" and the other 2 are retired lol.

Last edited by roadrunninMark; 01/12/22 09:08 PM.
Re: Electronics expert help needed.. i.d. resistor [Re: roadrunninMark] #3004755
01/12/22 09:18 PM
01/12/22 09:18 PM
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Originally Posted by roadrunninMark
TJP, you are correct, 1/8 watt! Now I know what to look for...

Watched youtube on testing resistors....2 don't show any reading and one 180ish, the other 350ish. Sounds like one survived, one is "wounded" and the other 2 are retired lol.


Sorry on not getting back to you sooner, good job on the perseverance smile
keep up posted beer

Re: Electronics expert help needed.. i.d. resistor [Re: Sniper] #3004853
01/13/22 11:18 AM
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B B ROY of Great Britain had a Very Good Wife who wore Gold and Silver Necklace

I had an Indian teacher for that electronics class.

Dennis

Re: Electronics expert help needed.. i.d. resistor [Re: cudaboy] #3004870
01/13/22 11:59 AM
01/13/22 11:59 AM
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All good TJP, I am learning as I go. I found some resistors that are close. 330 ohm and 360 ohm. These are 1/8w with 1%. They are also the metal film type vs. the carbon film of the originals, which is why the tolerance is better I take it. I asked an electrical engineer if it was OK to use the metal film vs. the carbon and he is it is OK to do so. Now, my question is which ohm rating should I use? 360 is closer to the original 350, so I am leaning that direction. There still may be 1 350 ohm in the decoration that is working properly (I didn't need to change out those leds as all were working) so I am thinking that that the 360 will keep the replaced leds to an equal brightness. What do you think?

Re: Electronics expert help needed.. i.d. resistor [Re: oldjonny] #3004905
01/13/22 01:30 PM
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Originally Posted by oldjonny
Originally Posted by Sniper
Bad boys race our young girls behind victory garden walls. get started now



LOL..I like the Politically Correct version.....probably one of the few things I remember from my EE education days is the CORRECT version of the color code...but the non-PG version


smile I could NEVER remember that version after the one taught to us 40 years ago.

Re: Electronics expert help needed.. i.d. resistor [Re: 71TA] #3004973
01/13/22 03:40 PM
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OK, these resistors are on the "cool white" led decoration. Can you guys confirm what I am seeing? Looks like Brown, Black, Black, Blue, Green? 100M ohm 5% 1/8w ???

coolLED1.jpgcoolLED2.jpg
Re: Electronics expert help needed.. i.d. resistor [Re: roadrunninMark] #3005084
01/13/22 09:25 PM
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hard to say with the Blue color, get out the DVM and measure them smile beer

Re: Electronics expert help needed.. i.d. resistor [Re: TJP] #3005099
01/13/22 10:00 PM
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Measured on my multi meter... readout shows about 560 with the setting set to "2000". So that is 1,120,000 ?? Is that 1 Million ohm?

Re: Electronics expert help needed.. i.d. resistor [Re: roadrunninMark] #3005104
01/13/22 10:17 PM
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560 on the 2000 scale would be 560

Re: Electronics expert help needed.. i.d. resistor [Re: ns1aar] #3005201
01/14/22 10:12 AM
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I wonder if it has been damaged then as according to the colors( is it possible), it should be a lot higher. I am guessing but both were about the same reading so I don't know if both could be damaged to the same level?

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