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LEDWiz, LED BLinky and IPAC4 issues?
drventure:
Ok. I'm at a bit of a loss as to what might be going on so I thought I'd just post and see if anyone else has had issues like this.
Basically, I've got 2, 32port LEDWiz's, and 1, 16 port version. Plus I've got an IPac4.
2 LEDWizs are plugged into the same USB Hub (A 7 port DLINK with a 3.4amp powersupply, should be plenty). The third is directly connected to the PC.
There's 3 other things plugged into that hub, and the hub itself is daisy chained to another hub, which is chained to a third, which is then connected to the base PC (I've got aquite a few USB devices online).
All LEDwizs are powered externally with 5V supplies.
Everything works just fine and LEDBlinky can turn on and off individual LEDs no problem.
BUT
When I run an animation that turns ON lots of the leds (like just about any of the canned animation files), I start loosing USB devices. Typically, the IPAC will either die or keys will just start pressing randomly.
Often, i'll loose the entire hub (as if it's become disconnected).
A reboot solves the problem.
I'm guessing it's a power problem, but I've tried different hubs, and this one now appears to be properly powered to handle a large load on it (it's a dlink hub).
Any thoughts?
RandyT:
--- Quote from: drventure on January 11, 2011, 09:29:10 pm ---All LEDwizs are powered externally with 5V supplies.
--- End quote ---
How do you mean this? You don't have external 5v supplies connected to the USB +5v terminal, only to the parts being controlled by the LED-Wiz's, correct?
drventure:
Sorry, yes, correct.
I've got a 5v PS connected to the bank voltage selects on the two LEDWizes connected to the 7 port hub. The hub is actually powered by it's own PS.
There's several other devices connected to that hub, including a couple trackballs and a flightstick.
I've had the IPAC connected to that same hub, and, then tried connecting it to a seperate hub farther up the chain (ie, closer to the PC). But I still get the same problems.
It's acting very much like the LEDwizs are still pulling power from the USB port instead of the external PS, but I've got them hooked up correct as far as I can tell, there's 5v at the Bank select terminals and I've got the ground connected to the LEDWiz ground terminal.
I have tried disconnecting the third LEDWiz (that's connected direct to the pc) and it doesn't make any difference, which I kinda figured. So it's definitely something about the two units that are actually in my CP.
I'll keep trying to narrow it down.
Thanks!
drventure:
One question. Is it possible that if the external PS is underpowered, the LEDWiz would then basically try to draw power from the USB port?
I haven't checked that explicitly. I'm pretty sure I've got a big enough PS to handle all the LEDs, but I'll double check that. I believe it's a 5v wall wart I had in my spare parts bin, so I'm not sure of the current output.
Nephasth:
How many devices do you have hooked up in your daisy chain of USB hubs?
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