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Electronics expert help needed.. i.d. resistor

Posted By: roadrunninMark

Electronics expert help needed.. i.d. resistor - 01/12/22 01:51 AM

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


Attached picture resistor.jpg
Posted By: TJP

Re: Electronics expert help needed.. i.d. resistor - 01/12/22 02:32 AM

Google "resistor color bands" for more choices or go here Resistor Color band calculator
And that is probably an 1/8 watt resistor beer
Posted By: Sniper

Re: Electronics expert help needed.. i.d. resistor - 01/12/22 02:44 AM

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%
Posted By: DrCharles

Re: Electronics expert help needed.. i.d. resistor - 01/12/22 02:54 AM

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
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 01/12/22 02:24 PM

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. **



Attached picture resistor2.jpg
Attached picture resistor3.jpg
Posted By: oldjonny

Re: Electronics expert help needed.. i.d. resistor - 01/12/22 02:26 PM

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
Posted By: Sniper

Re: Electronics expert help needed.. i.d. resistor - 01/12/22 02:29 PM

I was taught that version, too.
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 01/12/22 03:35 PM

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
Posted By: TJP

Re: Electronics expert help needed.. i.d. resistor - 01/12/22 05:35 PM

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
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 01/12/22 05:54 PM

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?
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 01/13/22 12:15 AM

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.
Posted By: TJP

Re: Electronics expert help needed.. i.d. resistor - 01/13/22 02:18 AM

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
Posted By: cudaboy

Re: Electronics expert help needed.. i.d. resistor - 01/13/22 04:18 PM

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
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 01/13/22 04:59 PM

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?
Posted By: 71TA

Re: Electronics expert help needed.. i.d. resistor - 01/13/22 06:30 PM

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.
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 01/13/22 08:40 PM

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 ???

Attached picture coolLED1.jpg
Attached picture coolLED2.jpg
Posted By: TJP

Re: Electronics expert help needed.. i.d. resistor - 01/14/22 02:25 AM

hard to say with the Blue color, get out the DVM and measure them smile beer
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 01/14/22 03:00 AM

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?
Posted By: ns1aar

Re: Electronics expert help needed.. i.d. resistor - 01/14/22 03:17 AM

560 on the 2000 scale would be 560
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 01/14/22 03:12 PM

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?
Posted By: 71TA

Re: Electronics expert help needed.. i.d. resistor - 01/14/22 03:12 PM

Agree, 560. Nothing is 1 million ohm except maybe a touch switch type circuit.
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 01/14/22 04:12 PM

it is 560! I was reading the colors backwards.....
Posted By: roadrunninMark

Re: Electronics expert help needed.. i.d. resistor - 02/12/22 01:10 AM

Update on the Christmas lights....got the new resistors finally and had the chance today to solder them to the leds that had them. Took some time and some burnt fingers but both yard displays are back to full lighted mode! I had an issue with the newer one. Replaced all the burned out leds and once all the new resistor "loaded" leds were also plugged in, some were dim and one led wasn't lit. I pulled it and tested it, worked fine. Plugged back in and wouldn't light. Pulled again and checked the socket it fit into. It looked ok so pulled the wire out of it and tried the led directly...same problem. So somehow I noticed it was brigher before and thought... "is it backwards (positive side to negative)"??? YES! for some reason, this one led is installed opposite of the others... I don't know why but when I but it in backwards, it lit and all the others went to equal bright. This one it the first in the chain and doesn't have a resistor so I don't know the reason it works this way.

So I am down to one set of color changing leds that need to be fixed. This set just keeps popping the small 3amp fuses in the plug. When I test with the LED light keeper tool (uses a 9v battery), it doesn't pop the fuses and the leds function normally (at least the ones I saw, there are 36 and the line is 25' long). It has some sort of enclosed "cylinder" prior to the first led, which I assume there is some sort of resistor or diode that does something to the power for the leds. Here is a picture of it below and the set (it says 2018 which I believe is the year it was made). Is there a way to test the thing before I have to open it up (once it is identified)?




Attached picture reistr.jpg
Attached picture resistr2.jpg
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