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The early fluorescents, meaning the linear ones found in most offices and the kitchens of some homes, had poor color rendering plus flicker from the magnetic ballasts. Later fluorescents overcame these difficulties but nevertheless many people did and do continue to associate fluorescent with...

That really brings us to another problem with present society-namely that people are getting lazier (and/or maybe more distracted) so that they do just the minimum needed to get by. I rarely see anyone taking the time to learn a new skill unless they absolutely need it. As a result, we have a...

Thanks for posting that, mubs. I saw it a few days ago and was going to add it to the thread. 113 lumens per watt is well into HID territory. We are way ahead of where we thought we would be now. Remember that less than three years ago 60 lumens per watt existed only in the lab and 20 to 25...

It's actually more common in the suburbs here than the city, but yes we do unfortunately have that. Unlike preschool which might be beneficial academically if something useful was actually taught, as far as I know these are mostly babysitting services where those in charge just give the kids...

On top of that you increasingly have taxpayer-funded day care masquerading as pre-kindergarten. The schools should get entirely out of the babysitting business. If you can't be home with your children until they start school don't have them. If you can't be home when your kids get home from...

Is there anything a Mac does that much better than a PC? Seriously, I don't understand why people even buy Macs or use them nowadays. Basically, you're paying more for a machine which is slower and which requires expensive proprietary everything when something breaks. On top of that, 90% of...

So the problem was noise emanating from the power supply. :wink:

Because most of them are teachers. The education field seems to be the last stronghold of Apples. I'm guessing teachers originally embraced Apples because due to their relative rarity they felt there was a certain elitism using them. As we all know, teachers love anything that makes them...

Here's a few things I found: Page 8 (part in bold should be one sentence): The DOWNLOAD Window will open up and show you what is, and has been downloaded. When it is done. It will say so. You can close this window down now or at any time without affecting your download. Page 17 (spelling)...

Yeah, I know that, and it uses cold-cathode fluorescent tubes to backlight it. BTW, I think the problem might be related to the tubes wearing out and changing characteristics. That can cause noise where none existed before. I wonder how many hours of use the display has had? The tubes should...

RFI from the cold cathode tube driver circuit no doubt. Bypass capacitors in a few key places on both the display and speaker circuit boards might help. Too bad I'm 3000 miles away or I could help with that. You might try moving the power and signal wires for your speakers as far away from...

I heard it reaches that (gearing limited) terminal speed of 104 mph long before the end of the ¼ mile. I don't believe they're using all that powerful of an electric motor so they had to make a compromise with the gearing. They probably adjusted the gearing so that the tractive effort comes...

This one is even better. It literally blows away the Ferrari 360 and Porsche Carrera GT while requiring no special skills from the driver. Just floor it and away you go. Frankly, it makes the two gas cars in the video look like the inefficient, expensive, overly complicated, primitive noise...

I'm with you on that, Merc. If I ever travel far, I'll just take the time to take Amtrak, or go by boat if overseas (you can get no-frills berths on those cargo freighters fairly cheaply). I don't think if I had to invent a way to torture people I could come up with anything better than air...

Yep, that about sums them up. They also have a penchant for using ridiculously small street signs and having exit signs on expressways 50 feet from the exit (with no previous signs warning of the upcoming exit). And let's not forget the entrance ramps before the exit ramps which NJ is famous...

At normal household AC frequencies of 50 or 60 Hz I believe this is correct but as frequency increases the current can't penetrate the body internally as well. This so-called "skin effect" is relevant even to high-frequency transformer design. At a few MHz the current basically flows only on...

Very interesting and complete. The only thing they missed was the fluxing of the boards before the wave-soldering process. BTW, my friend in the taximeter shop has a mini assembly setup. Just loading thru-hole parts on premade boards and flow-soldering, but nonetheless similar in principle...

Yep, that's pretty much how it works-you have a MOSFET switch which turns on and off at upwards of 50 KHz (to keep the switching inaudible and also to use smaller size active elements). The resulting output looks like a square wave equal in amplitude to nearly the original raw DC voltage but...

May I ask how much RAM this machine has? As we all know Win98 has problems with over 512 MB, although with a line in the 386enh section of your system.ini file (i.e. maxfilecache=512000) it can be made to work with up to 1 GB. I heard over 1GB will sometimes work on some systems. Over 1.5GB...

By definition pee-powered batteries also offer ultra-quick recharge. 8) I wonder if these can be scaled up to power something like an electric car? I can imagine the entire family taking turns peeing in the "fuel" tank before a long trip, and drinking lots of fluids along the way to keep...

The brakes can easily hold the plane even under full throttle. As a matter of course airliners use the brakes to hold the plane as they spin up the engines before takeoff. I only flew once in my life and noticed this right away. Once the engines are up to speed (maximum thrust), they release...

Not a chance, Doug. The basic combustion cycle from which an engine derives power produces CO2 in direct proportion to the amount of fuel consumed. The other emissions which the US controls are byproducts of the basic combustion cycle, which if perfectly "clean" would only produce CO2 and...

At least the color temp will be nicer than incandescent, for the second or so that it burns anyway. :mrgrn:

I'm not tired of seeing climate change threads, but I'm tired of government officials who pretend that it's all junk science. It seems that maybe the changes aren't getting the attention they deserve because they seem to be affecting the southern hemisphere a lot more than the northern one...

Nothing with any decent output yet but those small-base lamps will definitely be among the first to offer LED replacements since they're the most inefficient of all common household incandescent lamps. The 40 watt ones only put out about 450 lumens. We can do this with LEDs today using about...

How are those in the noise department? One reason I'm sold on Seasonic is their very low noise level. Despite the low noise, the 120mm fans they use manage to move enough air that I was able to dispense with case fans without any problems.

Playing around a bit more I found that 100% of my problems were related to the graphics card driver (I suspect this is why Merc finds so many issues with nvidia cards). The most recent version of the Win9x drivers caused the crashes which trashed the IRQ tables, and I wasn't able to play 3D...

Most of what they say is true for the current state of LED technology. However, let's look at what happens as things get better: LEDs have already been lab-tested at HID efficiencies. It's only a matter of time before such LEDs are commecially available. Cree and several others claim that...

More random thoughts-I just noticed that we had a total of 77777 posts on this site as of 7:04AM EST today. Lucky 7's anybody? And Tannin had the honors of making the lucky 77777th post.

To update everyone on what may have caused the problem in the first place, see the last post here. Now remember when I mentioned that my problems first started when I went to the overlay setup tab for the Hercules card. The system crashed, and that basically screwed up everything, including...

Success at last! :mrgrn: I enabled ACPI, added the line ACPIOption=1 in my registry, and followed the remaining steps in that article I linked to a few posts back. The system detected the ACPI BIOS, and went through several reboots installing the needed drivers. Upon one reboot I noticed...

No, it's not sharing the IRQ with the AGP slot. As I said, I had this problem even with no cards. You're right, but I want to make sure the motherboard has no issues before I do. Right now I tried a few known good PCI graphics adaptors and the system wouldn't even POST whereas before it did...

I didn't have any PCI cards in at all when I noticed the problem, just the AGP graphics adaptor. I added my Promise controller to slot 3, it detected just fine, and everything else was otherwise the same. All the integrated peripherals work just fine. The problem is the graphics card. I'm...

Well, I managed to install Win 98 with the setup /p i switches (which disables ACPI) mentioned in that article and system information tells me I have no problem devices. However, the video problem still exists. Looking in device manager-pci bus it said IRQ steering disabled, IRQ table errors...

Searching a bit, I found this. Most relevant to my problem is the following: Emphasis mine. That's exactly what my system is doing. In fact, the problems seemed to start once I installed the motherboard drivers for the USB ports now that I think about it. The article also confirms what...

That's one of the things which turned my off to a lot of volunteer work. I love helping people making an honest effort to better themselves. I used to help my friends study for tests all the time in high school. One girl I helped even managed to get a seemingly impossible 100% on a test with...

Playing around some more I found that the graphics card gives all the high color VESA modes in DOS just fine. Obviously nothing wrong with it then. As I said in my previous post '98 is the problem. Yes, I'm taking everyone's suggestion about forgetting '98 on this machine. Understating it a...

Thank you for answering my next question before I asked it. :thumbright: Yes, I did see ACPI enable/disable in the BIOS and left it at the default (enabled). That probably caused my problems since I'm guessing Win98 doesn't know how to deal with ACPI. In any case I did a fresh install of '98...

Wow, thanks a million Tony! :thumbleft: I'm going to get little sleep and take a break, but I'll post later how it went. Glad to hear the motherboard is probably still OK, just a little confused. It sure sounds like you've spent your share of time dealing with this exact same problem. BTW...

As some of you may know some time back Merc sent me an A7N8X-E motherboard and XP2500 processor. Last week I bought some RAM for it, and on Tuesday a nice Lian Li PC-60 case arrived. I assembled everything, put in a spare floppy, CD-ROM drive, and 40 GB Maxtor, and then installed Windows 98...

Shouldn't be a problem since each spot would only be dissipating about 3 to 3.5 watts. Not really, but maybe you can adapt mounts for MR-16 halogen bulbs. In fact, eBay has premade LED arrays designed as drop in replacement for MR16 halogens. I believe they're also designed to run off 12V...

OK, now I understand a little better. 1000 watts to light a few 18"x18" cases really seemed like a lot. Now I know it was also for general lighting of the booth area. Anyway, to light an 18"x18" case to 1/10 the equivalent of full sunlight requires a light level of 5000 lux or 500 lumens per...

If you have 1000 watts of halogen bulbs then that's roughly 15,000 to 20,000 lumens. I could be more exact if I knew the specific bulbs. In any case, you're looking at 300 to 500 watts worth of LEDs to replace that. Forget the 5mm and 10mm ones. Granted, right now they're more efficient than...

The problem is right now LED efficiency isn't high enough to appreciably reduce your power consumption. Maybe with LEDs you could get by with 500 watts worth since they are roughly twice as efficient as incandescent lamps, and you'll need a huge heatsink to mount them on. Even with T-8...

Better to be honest than to lie in order to attract someone. Sooner or later the person will discover the real you anyway, and be mad at you for lying to them. That's not a good way to start a relationship or even a friendship. BTW, if this part of your profile is true Merc the future looks...

That sounds about right. Just be aware that those maximum ratings are misleading since they are usually a one time deal. A 4200 joule rating means it will indeed protect you from a 4200 joule surge-once. After that the surge protector is usually destroyed. However, such large surges are...

Probably the absolute best cells are Sanyos but they are a bit pricey. A lot of people swear by them. They're usually pricey but someone on eBay has some fairly cheap here and someone else has another auction here. In the past all Energizer rechargeables were just rebranded Sanyos but I heard...

I'm actually busy checking out RAM right now so if Coug gets the other DIMM working Tim could probably use it more than me. Best price I've found for 1GB PC3200 so far is $68.49. If anyone knows of any better prices please let me know soon since I'm about ready to order. Note that I need...

First there was the hype, and then I saw idiots camping out Tuesday night waiting for the stores to open. Finally, everything else paled by comparison when I checked eBay. $12,100 for a game console!? :o And I saw quite a few other auctions which closed in excess of $5,000. If this...

I agree 100%. I first saw those on Newegg. My first impression was that they reminded me of the squirrel cage blower housing on an HVAC system. Yes, it's different, and awful at the same time. :eekers: :frowner: Thank goodness for the high price or they would probably be the latest trendy...