snarlydwarf;566351 Wrote: > Wrong: the AC input to your device goes all over the place. When someone > posts that nasty, that dumb, that uneducated, and incessantly, then being polite to an asshole is useless.
Reality taken from so many industry standards from the Computer Business Equipment Manufacturers association to Intel specifications for all power supplies. AC voltages can change so much as incandescent lamps dim to less than 40% intensity. And that is more than sufficient voltage for all computers. Regulation is the job of all computer power supplies. To maintain perfectly ideal DC voltages even when AC mains voltages vary that much. A spec even defines how long a power supply must output completely stable power when no AC input voltage exists. How does one know that when only using observation? Any regulation that a UPS might do is already done by a superior computer power supply. Why must computer work uninterrupted and normally when incandescent bulbs dim to 40% intensity? Because those requirements are what we (the people who go educated) must design to even long before the IBM PC existed. View the output of typical UPSes in battery backup mode. This 120 volt UPS outputs 200 volt square waves with a spike of up to 270 volts between those square waves. Is that destructive? Potentially harmful to small electric motors and power strip protectors. And ideal perfect power for all computers and other electronics. Because all computer power supplies - even before the IBM PC existed - were required to be that robust and stable. How does one learn that reality from observation? What happens when the UPS switches from AC to battery? A long period of no power while the relay switches. And yes, all computers are required to provide stable uninterrupted DC power even during that switchover period. A period of no AC input power. Buy another function found in all computer power supplies to make events on AC mains irrelevant. UPS outputs the 'dirtiest' power during a blackout. No problem. Every computer is required to make that 'dirtiest' power into ideal perfect and stable DC. This was known over 40 years ago. Incandescent bulbs dim to below 50% intensity. And all electronics must operate uninterrupted. Computers are required to be even more robust. Those educated by hearsay and observation would not know. Will only reply nasty. Those educated only by observation also proved "spontaneous reproduction". Many without basic science would not even know what spontaneous reproduction is. Victims of knowledge only from observation. The best voltage regulation is required inside every computer. Even required by international design standards. UPS has only one function - to provide temporary power to save unsaved data. -- westom ------------------------------------------------------------------------ westom's Profile: http://forums.slimdevices.com/member.php?userid=39650 View this thread: http://forums.slimdevices.com/showthread.php?t=80889 _______________________________________________ discuss mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/discuss
