23.10.2013, 21:21:14 (Dieser Beitrag wurde zuletzt bearbeitet: 23.10.2013, 22:20:46 von ari.)(Mod)
(23.10.2013, 21:11:08)da_psycho schrieb:(23.10.2013, 16:44:20)ari schrieb:(21.10.2013, 23:47:42)ari schrieb: Hi guys can anyone help?
I bought 50 x WS2801 LEDs to test with my ambi-tv. I used gfix fork of ambi-tv (where he added WS2801 support) but my LEDs only show RED (and only the first LED shows white). I am using the mood-light to test (as this doesn't require and video input).
I have connnected the DI to the correct pin, and the LEDs are powered from a seperate power supply to the Raspberry Pi. LED ground is connected to it's own LED power supply. Raspberry pi is powered by a seperate normal mini USB -> 5V power supply adapter.
Any ideas? Do I need to connect the Pi and the LEDs to the same power supply so the grounds are connected to the same place?
Hi guys please help me!! I am driving myself crazy.
I went and bought 2 more WS2801 strips (50pcs) and tried those and they also don't work, but more LEDs light up on these 2 pairs than the last one. I can make a YouTube video showing you what the problem is but basically when testing with gfix ws2801.conf and the included sample.conf it it doesn't work. Colours are flickering (and don't seem the right colour), and some LEDs don't even turn on..
I have wired the Raspberry Pi and the WS2801 strip to the same power supply (so same ground, V+ etc.).
I have also tried PixelPi (just to try and turn the LEDs on and off, but this doesn't work properly either. only some LEDs turn on and off, and when trying the fade/chase etc these do not work).
Please help Thanks
make pictures of your used gpio pins and show how you connect your ws801 leds
Thanks for the reply! I wil do so and take some pics and video
(23.10.2013, 21:11:08)da_psycho schrieb: make pictures of your used gpio pins and show how you connect your ws801 leds
Here are pictures as requested of my WS2801 wiring. Would appreciate any help/advice from anyone!:
Connection to 5V20A power supply (black wires are to power RPi):
Connection to GPIO pin on RPi (I know, I know, I don't have jumper connectors yet...sorry):
Pic showing the correct input direction wires are used on the WS2801 (arrows indicate they are pointing up towards to LED therefore it is Input as far as I understand):
And here is a video showing behaviour of the 50pc WS2801 (sorry for portrait and bad quality). You can see half the LEDs aren't even lighting up, and colour is flickering etc, even when the source video is almost solid blue and appears fine in MPlayer!:
Config file being used (i'm not sure how to do the config file to tell it I only have 50 LEDs and how I would test these I'm not sure):
I tested PixelPi python app and this also didn't work properly with these LEDs. I could not chase, fade, turn on, turn off etc, so I'm not sure what other tools I can use to test these LEDs. Of course it might be the LEDs that are the problem, but this is my 3rd strand now!
Thanks for any help!