2*50 LED Stripe + Arduino Uno + Only the 1st Stripe "blinks"

Other Hardware LEDs and Multiplexing
1

Hello everyone,

I'm very new to using a Arduino or programming something at all, so please be nice :slight_smile:
The reason I'm using Arduino is boblight - creating a ambilight when watching movies via xbmc.org.

So what do i do.
First of all this is my hardware I'm using

100 LED (2*50 Stripe) from here http://www.ebay.de/itm/331078623963
Arduino UNO (from amazon)
some adapters
5V 10A external power supply
This is the code i use on my arduino

I'm using the "regular" LEDstream.pde from Adafruit (non modified by me)

This are some "live pictures"



When i upload the code to the arduino - only the first stripe of LED starts working - the 2nd one remains dark.
Where is the problem?

2

Hi, your pictures are rather blurred so its hard to be sure. But I can't see how your power supply is connected to the second string of leds. I can only see the data connection. On picture 2, I can see the power lines for the second string are unconnected. Pictures 3 and 4 are too blurred/dark to see them clearly.

Paul

3

Hey,

thanks for answering.

Right now the 2nd String is not connected to the power supply. Is the power not "flowing" from string one to string two?

4

Correct. The data lines do not also carry the power.

5

Oh boy
pretty stupid by me :smiley:

So just put the red and blue wire from the 2nd sting together with the ones from the first into the dc Jack?
Must it be the end of the start wires from the 2nd ?

6

Pretty sure it doesn't matter with the power lines. Pretty sure it does matter with the data lines - they will be one way only. Maybe most convenient to connect power at the Arduino end, then daisy-chain all 5 connections at the other end to the second string.

7

Just tested it

works now

thanks a lot :slight_smile: