Data issue

[Jandrews755]

Hi I'm having a data issue iv split up 200 12v pixels into 50 lots with pigtails joining them back up but I'm having issues with data flowing from 100 to 101 through pigtail. I know I have power running to the 200 pixels because volt meter says it's got 11v running to the end. Iv repleced the pigtail and restripped the data and rejoined but still wont light up past 100. I know the controller is set up correctly because when I plug in 2 new 100 lot lights it dose what I want. Any ideas on why the data isn't flowing. Thanks

 

[Notenoughlights]

Double check your polarity on the pigtails, I've had this same issue where one lot was Red+, Black-, Yellow Data, the next lot was Red+, Black Data, Yellow -

 

[Jandrews755]

Double check your polarity on the pigtails, I've had this same issue where one lot was Red+, Black-, Yellow Data, the next lot was Red+, Black Data, Yellow -

I used the same batch pigtail from 50 to 51 and that work. Iv wired it up the same way for pixel 100 to 101

 

[Jandrews755]

make sure the string isnt backwards.

That was my 1st thought if only it was that easy of a fix

 

[Notenoughlights]

Have you set your controller to output to more than 100 pixels? Some are default set to 100, so pixel 101 won't light up. Same for the software you are using to control said controller, do you have data being output correctly for 101+ pixels?

 

[Jandrews755]

Have you set your controller to output to more than 100 pixels? Some are default set to 100, so pixel 101 won't light up. Same for the software you are using to control said controller, do you have data being output correctly for 101+ pixels?

yer iv plugged in 2 brand new sets off 100 and all 200 lights light up like i wanted

 

[Jandrews755]

just because its the same batch doesn't mean it isnt wrong.

Sometimes they are just wired wrong, doesnt hurt to check.

how can i check this ?

 

[Notenoughlights]

how can i check this ?

Seperate the pigtails from the pixels if you've soldered them on. Multimeter on continuity, go between each colour of wire so red to red, black to black, and whatever the last one is (they vary) each colour should have continuity together, if you touch red and black and get continuity, you have a mismatched pair and you need to find the ones that match.

 

[Jandrews755]

how can i check this ?

The 200 string of lights where working before i cut into them to insert pigtails

 

[Jandrews755]

Seperate the pigtails from the pixels if you've soldered them on. Multimeter on continuity, go between each colour of wire so red to red, black to black, and whatever the last one is (they vary) each colour should have continuity together, if you touch red and black and get continuity, you have a mismatched pair and you need to find the ones that match.

all good no dramas there

 

[Jandrews755]

Here's some pics of my setup just incase I'm doing something dumb I can't see. Iv also put a pic in of the first pigtail I put in that's working
Appreciating all the help that's why I love this hobby so much so many ppl willing to help. I can only hope I'm smart enough to help someone else down the track

 

[Notenoughlights]

I suspect that the pinout for the pigtail you have crimped on, is different to the pigtail that is pre-formed attached to the string of lights, this is something you can not test unless you cut the pigtail off the string of pixels to test. You say you test the voltage at the end of the pixel string, have you matched positive on the cable to positive on the pixel PCB?

 

[Jandrews755]

I suspect that the pinout for the pigtail you have crimped on, is different to the pigtail that is pre-formed attached to the string of lights, this is something you can not test unless you cut the pigtail off the string of pixels to test. You say you test the voltage at the end of the pixel string, have you matched positive on the cable to positive on the pixel PCB?

I just had the same tought as i was uploading the pics im just wiring a pigtail on the other side now

 

[Notenoughlights]

I've got a set of pigtails here, see the image below. The 3 wires at each end are what I was talking about, the red on one side should connect to the red on the other end when the two pigtails are plugged in correctly. Same for the yellow and black wires. I suspect you have something like this, but your black and yellows are crossed over in the string of lights.


View: https://i.imgur.com/PyXGJqa.png

 

[Jandrews755]

Bingo I'm back in business. It was the original pigtail on the other end. Thankyou all for your help it's my 1st year and still learning so much but I love it. I'll be back in 20min with another question haha