[DIY] Selfmade AmbiLight using LED Strings (2 Viewers)

[Lightning303]

Digital GND is not connected. It seems that you have connected the Power GND with the black wire, not the Digital GND.

Edit: Well your dutch site you linked a few pages ago, says you did it right... so no idea

 

[HomeY]

It's really starting to freak me out.... I thought i would be glueing the LEDs to the TV now and finalizing the shizzle

Just to be sure i checked the output voltage again on the PSU and als @ the end of the LEDstrip
PSU Output: 5.07v
End of strip: 4.92v
So that's hardly a drop (which would indicate i could power everything at once).
If it would only work...

 

[BassFan]

versuch doch mal die Rolle abzuwickeln
vielleicht gibt es hier ein Problem.
-----------------------------------------
but try the role to settle
Perhaps one problem is here

greets

 

[HomeY]

versuch doch mal die Rolle abzuwickeln
vielleicht gibt es hier ein Problem.

Tried that, without results ;(

 

[kenwonders]

how is the white gnd connected to the arduino? i can see a black ground from the block, but is that connected to the white wire on the LED cable?

 

[Lightning303]

how is the white gnd connected to the arduino? i can see a black ground from the block, but is that connected to the white wire on the LED cable?

Thats what i thought aswell, but both white and black should be on the same potential, as both are connected to -V on the psu. But it cant hurt to test if it works if both, the white and the black wire, are in the same connector, instead of 2 different ones @HomeY.

 

[kenwonders]

have you grounded to the arduino? that looks suspiciously like a grounding issue now.

Yeps, i have the arduino grounded to the PSU. Somehow (after connecting the power several times in a row) the first LED started to light up (but this only happened once):
View attachment 145968

GND = black wire on top, connected to COM on PSU
DATA = PIN 2
Arduino power = USB

My output:
View attachment 145970

PSU connections:
View attachment 145972

My LED strip is 4 meters long (60 LEDs/m). Can it be that it's too long for this test?

If your PSU connector 4 is not ground, then this really is the problem..wire the black wire into 3 along with the white instead.

 

[HomeY]

If your PSU connector 4 is not ground, then this really is the problem..

Look at this image
My PSU has dual output.
1, 2 & 3 is Input from 230V, where 1 = Live wire, 2 = Neutral, 3 = GND
4/5 = -V, 6/7 = +V

The Black wire from PIN 4 goes to the GND from Arduino (tried PIN 3, doesn't matter)
The White wire from the LED strip (GND) goes to pin 5 on the PSU
The Red wire from the LED strip (+5V) goes to pin 7 on the PSU

When i connect the white wire from the LED strip to PIN3, i don't get voltage on the LED strip.
GND / -V should be the same.

 

[kenwonders]

If your PSU connector 4 is not ground, then this really is the problem..

View attachment 145987
Look at this image
My PSU has dual output.
1, 2 & 3 is Input from 230V, where 1 = Live wire, 2 = Neutral, 3 = GND
4/5 = -V, 6/7 = +V

The Black wire from PIN 4 goes to the GND from Arduino (tried PIN 3, doesn't matter)
The White wire from the LED strip (GND) goes to pin 5 on the PSU
The Red wire from the LED strip (+5V) goes to pin 7 on the PSU

When i connect the white wire from the LED strip to PIN3, i don't get voltage on the LED strip.
GND / -V should be the same.

I understand, thanks for taking the time to correct you are of course correct, i was looking at it backwards.

ok my next suggestion is to use the opposite end for everything. i have 2 types of LED set here at home that use the opposite end to the one you're using. did you get an add on connector for the other end?

i know this sounds a bit nuts, but you are seeing exactly what i saw before i got the right order. it is known the lights only work in one direction.

 

[HomeY]

did you get an add on connector for the other end?

There are connectors on both sides of the LED strip.
I've already tried connecting the Data from the other side, without results.
When i measure the LED strip, i'm getting a nice +5V on start, and 4.92V on the end, so that seems fine, but i'll give that a try
both data & DC from the other end