I seem to remember some long ago shit with the rise time of the 5V supply for some logic ICs. In fact I installed a DeltaTau board that hangs every other start-up because the start-up time of some PC power-supply that supplies it is too slow.
Solution to that one: interlock the 5 Volt with the power-supply ready signal from the PSU. It is a problem with any cheap switch-mode power-supply, but then I did NOT say that this is your problem; but it might. cheers j. On Sat, Nov 26, 2011 at 11:08 PM, Viesturs Lācis <[email protected]>wrote: > 2011/11/26 Dave <[email protected]>: > > > > Is your 5 volt supply that you are using floating? IE, the 0V level is > > not referenced to the wall plug etc? > > > > If you are not sure, you might want to try stealing 5 volts off your PC. > > I already am taking 5V supply from PC's PSU. > > > Also, how long is your EPP cord? I forget the max distance but it is not > > very far. Maybe 6 feet or so?? I think the specs are in the 7i43 manual. > > 7i43 is inside PC case. Cable length is less than 50 cm (20 inches). > > Viesturs > > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure > contains a definitive record of customers, application performance, > security threats, fraudulent activity, and more. Splunk takes this > data and makes sense of it. IT sense. And common sense. > http://p.sf.net/sfu/splunk-novd2d > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
