cyaniron wrote:Are u using the power usb hub with the Enntec? If so STOP! It needs to be directly connected!
dmxlighting wrote:Ive never tested this but if my very bad memory serves correct Im sure ive read that its not a good idea to use a usb hub and a dmx dongle.
Did I read it in the enttec manual?? I'll go look later!
But if you have and it works then I guess its OK but perhaps its a resources thing. ie if the spec of the PC is very good.... ????
cyaniron wrote:The computer I use for lights is a Pentium 500, with USB 1 (although I have tried the JMS unit with a Core 2 duo computer getting the same results).
cyaniron wrote:To DMXlighting. Re: DMX2USB problem. Freestyler doesnt crash. It carries on working fine, just that the fixtures stop receiving any data. I read that there is a known problem with Enttec open that is similar to this (viewtopic.php?f=10&t=332), and I have read elsewhere that Enttec open drivers work with the USB2DmX device. I guess that the DMX2USB device is a condensed version of the Enttec open, I'll try adding the capacitors to see if it helps any.
RE: Low spec computer being a problem. I'd agree if I was complaining that my visualisations looked naff using this computer, but it should keep up with putting out a stream of data on a USB bus!. I have tried the Enttec on my Core 2 duo computer, and get similar results, but I'll do any testing on the Core 2 duo first to be sure. Would USB2 be any advantage?.
remco_k wrote:You told that you've created your own 5 to 3 pin converter. Please check that you did'nt crosswire it by accident.
What type of cable did you use creating this converter?
cyaniron wrote:Are all the cables correctly wired?
Hmmmmmmm. Given that the USB2DMX interfaces works, and I can control individual fixtures with the Enttec, this suggests wiring is OK..
cyaniron wrote:Thanks for all the replies.
RE: JML USB2DMX
I made a little USB cable which has 66pf of capacitance between the two data lines and ground, and put it between the PC and my USB2DMX. This helped a lot, and it froze twice during the night, whereas it used to freeze a lot more.Searching around, I found that ST make a filter (http://media.digikey.com/PDF/Data%20She ... /USBUF.pdf). As my port is USB 1, and I suspect the data rates are very low, I expect I should be able to add more capacitance without affecting the data, or I might have a go at putting in some 22ohm ish resistors to see if that helps. I might try getting a clip on ferrite core to see if that helps.
remco_k got it!.
I rechecked the wiring, and I have crossed pins 2-3, and 3-2. I'll rewire it, and I expect that will fix it. As it appeared to be working for 1 fixture, I didnt suspect this. D'oh
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