On Oct 6, 2008, at 4:48 PM, Damian Stewart wrote: > David Kirkpatrick wrote: >> Hi Peter, >> >> The Open DMX has stability problems and the fading is jolty >> sometimes. Something to do with not being able to store an entire DMX >> frame at the same time I think. I read an article a while ago that >> explained the exact differences, but I can't seem to find it again. > > actually, the Open DMX is just a standard FTDI-based USB to serial > adapter > with the outputs wired into a 5-pin DMX plug. in other words, you > could > achieve exactly the same with a standard serial port, wiring up the > RX/TX > lines into the right pins. this is all the Open DMX is on the > inside. the > system driver takes care of the timing, and doesn't do a very good > job of > it at all. > > definitely go with the Pro.
USB serial have pretty crappy timing in general, from my experience. I have banged my head against the FTDI driver quite a bit while working on Firmata. If you need really tight timing, go with a real serial port. .hc > > -- > damian stewart | skype: damiansnz | [EMAIL PROTECTED] > frey | live art with machines | http://www.frey.co.nz > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> http://lists.puredata.info/ > listinfo/pd-list ------------------------------------------------------------------------ ---- kill your television _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
