#Unable to get "downstream" XXL Disco on a stick to light

1 messages · Page 1 of 1 (latest)

midnight breach
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[neopixel DISCO_LED]
pin: PB0 # signal interface
chain_count: 100 # Number of lamp beads
color_order: GRB # colour sequence
initial_RED: 0.2 # Initial red brightness
initial_GREEN: 0.2 # Initial green brightness
initial_BLUE: 0.2 # Initial blue brightness

I am trying to get a Disco XXL setup working, I have the above configuration in my printer.cfg and have full RGB on the first "stick". I have tried replacing the wires from D-Out to D-In and have tried a different stick. I get the same results which is no activity but occasionally one of the LEDs will partially light.

Currently I have 4 Wires into the first stick (GND, +V, -V, and Data), and 3 going to each downstream stick (+V, -V, and Data). I was told the GND isn't necessary but I have tried adding it back into the downstream stick and it made no change.

Am I missing something to get this working?

photo_5082690317454520021_y.jpg
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Wired to Octopus Pro RGB header

image.png
midnight breach
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I'm not aware of any other RGB headers on the Octopus Pro, hope was to have 4 sticks (100 LED) connected, but right now I am not getting more than 1 stick and testing with just 2 connected.

midnight breach
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Maybe if I wired 5V directly to the downstream sticks?

midnight breach
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If I turn down the light to ~10% the downstream stick still doesn't light, not sure it should be undervoltage?

mighty lagoon
midnight breach
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Today I measured DC Voltage going into 2 of 2 connected sticks, input voltage is 4.898V , is this not enough for 2 sticks on same power connection?

midnight breach
lament kestrel
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what happens if you try running them all in parallel from the header?
it'll be a 25 chaincount instead of 100, and all sticks will be the same pattern.

nocturne dagger
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I had a burnt out barf that i messed around with for a couple days until i figured out it was burn out. one of the LED's would still kinda half light up

steep cedar
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I'm running 72 * ws2812 LEDs on my octopus pro RGB header without issue. a voltage drop is normal after some amount of LEDs. (this is why larger arrays have power injection).
I cant rightly say if 4.89 is bad as i don't have a Discostick my self, but a drop of 0.11V is probably ok.
Make sure you are wiring the 2nd stick the right way around, stuff like this is is not omni directional due to its addressable-ness.
I hope this helps 🙂

fading acorn