The thing you have to remember is that a billboard will be using lamps more like in a theater than what you would be used to inside a building. They could have a large ballast to fill or many filiments to heat up. Remember a filiment has very little resistance until it gets hot. Electric motors use statges or capatitors to limit starting drop, but lamps may not. I agree the utility is probably cutting corners, but that is a constant problem and pretty much a fact of life.
Billboard lighting across the street should not be causing a voltage dip on the computer power circuit in the office sufficient to reboot the computer. Sounds like a utility issue. If it was a 200HP motor...
The reason the computers rebooted is that when you first turn on anything with a large capacity or has low resistance until it heats up, temporarily there is such a drop in voltage that it is equivalent to a power cycle.
The author didn't say that it was an electronic billboard. An electronic billboard would be illuminated all day (maybe shut down late at night when nobody will see it?). This was a good old fashioned billboard with lights so that it could be seen at night.
I am curious why the billboard lights coming on caused the computer to reboot. The author seems to know or suspect but didn't say.
Be careful. I have a very bad attitude about the unfortunately named Uninterruptable Power Supply. I've seen more failures in those things than in the "dirty" building power.
A proper UPS has a full time inverter running off of batteries with a completely independent charger. Not all UPS gear is like that. Some have standby inverters, some have synchronous inverters, and some are just plain bizarre.
If you expect the UPS to "clean up" your power, you'd better get a full time inverter and make certain that the circuit that you use doesn't go far and that ALL outlets are VERY clearly marked so that some cleaning crew doesn't plug in to them.
Dirty power is usually best fixed at the source: the building ground system. Make sure the neutrals are properly bonded in the correct places. If you don't know what I'm talking about, hire a master electrician and have them explain it to you.
This fix sounds to me like using a small bandage for a sucking chest wound of a problem.
We thought we were being careful and clever.. integrated UPS into wiring of our offices.. no box , common maintenance location for mulitple small UPS boxes.
The only indication of UPS was involved.. orange colored outlets indicating the power was supplied by UPS. Standard outlets had regular while/beige color.
Problem: the cleaning lady coming through in the evening didn't know the significance of the orange outlets.. yup, she put a high current draw device (vaccum cleaner) on the limited current UPS outlet.. causing the current limiting on the UPS to kick in .. and shutting down the workstation running simulations overnight.
What did I learn?... - communications to everyone is important (and is hard to maintain), and UPS is just one aspect of clean power.
Robots that walk have come a long way from simple barebones walking machines or pairs of legs without an upper body and head. Much of the research these days focuses on making more humanoid robots. But they are not all created equal.
The IEEE Computer Society has named the top 10 trends for 2014. You can expect the convergence of cloud computing and mobile devices, advances in health care data and devices, as well as privacy issues in social media to make the headlines. And 3D printing came out of nowhere to make a big splash.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.