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That should be possible with a microcontroller and a little programming. The driver ICs I use can have PWM dimming, and most microcontrollers do PWM. Yes, I've thought of that. That's one reason why I suggested adding reds and cyans, with each color driven by its own driver. If/when the tint...

Hence my suggestion of using low-voltage wiring. I think anything 48VDC or less is considered low-voltage, and not subject to the same regulations as 120VAC house wiring. Agreed. Perhaps even start a thread on CPF to solicit other opinions. The lens on that light does make it appear somewhat...

If you're thinking in terms of eventually replacing the LEDs with better ones, then I'd say consider 1 amp drive currents, especially if you'll be dimming them much of the time. As that document I linked to shows, at 1 amp with enough cooling you can still get in excess of 60,000 hours ( > 13.5...

I'd try to put in low voltage DC wiring as much as possible. Common voltages are 12VDC, 24VDC, and 48VDC. To convert 120VAC to these voltages a variety of options exist. PC power supplies are one if you want 12VDC. 48VDC is a common voltage in industry and I'm sure many options exist to...

Cree lab tests 186 lm/W @ 350 mA LED It looks like we might have high S bin or even T bin ( > 192 lumens @ 350 mA ) XP-Gs in the next year or two. Morever, if this new lab samples scales like the XP-G I tested, we should expect about 500 lumens at 1 amp, probably in excess of 800 lumens at 2 amps!

And that's always been the biggest problem I've had trying to make any sense of most religions. OK, I'll grant that there exist beings more powerful than humans, more advanced. Perhaps millions of years more advanced. As Charlton Heston said in Planet of the Apes: "I'm a seeker too. But my...

Did anyone look at the RSS feed? It's a combination of nonsense text plus vulgar images. Where's Doug lately? Some of these spam threads have been here for over a day. We really need to give a few long-time members privileges to remove spam and/or delete accounts which post spam.

Considering that huge 4000+ HP diesel locomotives burn 3 to 5 gallons per hour at idle, I doubt that a car with 1/20th to 1/10th the horsepower burns 1 or 2 as some here are saying. I know gasoline engines are about half as efficient as large diesels, but still that figure seems rather high...

I guess they figure the costs of shipping the other tubes back, combined with the chance of damage in transit, probably makes it not worth their while. I'll guess that their costs for a 25-pack of 830 tubes are less than the return shipping costs. Maybe not as good as you might like but is it...

Trust me, if you get the proper size tires for your rim, then airless tires are perfectly safe. A lot of people don't bother to measure their rim properly, order the wrong size tires, and then blame the tires falling off on the manufacturer. There's so much FUD spread around the Internet about...

Just be cautious with any type of general lighting replacement using 5mm LEDs. I'm currently in the process of test screw-in LED lamps for someone. The ones using 5mm LEDs took around 300 hours to degrade to 70% brightness. Power LEDs on the other hand last much longer. There's one in my...

Please let me know your impressions. I may eventually order a case myself.

No arguments from me there. I'm not big on the warmer tints myself inside.

I mentioned this earlier regarding CCT preferences, and here is a survey from CPF which confirms that (I added the CCT corresponding to each bin): Note the strong preference for 3700K to 4300K, although large numbers of people still like CCTs in the 5000s. There is also an uptick in the...

Philips also makes CRI 98, 6500K tubes according to this. Their TL-D 90 family actually has a more continuous spectrum than the TL90 series, and about 15% higher output, despite both having the same CRI. Only problem is the TL-D 90 are only sold in Europe as far as I know.

In case anyone might want the Philips TL 950s I linked to 2 posts above, I found them cheaper here. $6.41 each for a case of 25 versus $7.50 in the original link. Not a bad price for such a high quality tube IMO. If I needed tubes I'd consider buying some myself. If anyone local to me is...

I just realized the first tube I linked to is 6000K and the second 5000K but you're looking for 6500K. I came across these, but $32 per tube? Ouch! Just in case you're not familiar with the nomenclature on fluorescent tubes it's a three digit number like this: 965 The last two digits are...

These look promising to me. These look even better if you want to spend the money. The clue that a fluorescent lamp has good color rendering (beyond the CRI ratings) is when it has much lower lumen output than similar lamps. That's the case here-these lamps are all ~2000 lumens compared to...

The preference for low CCT lamps is hardly universal. It seems to be more a cultural thing. In Japan 5000K in residences is common, for example. And some surveys point to 3500K-4500K being most preferred. The thing is many people just go with what they are used to. Incandescent lamps were...

More blue in the light spectrum does indeed close the pupil, and as with a camera, that enhances depth of field. Here's a good explanation of that along with the other benefits of using light containing more blue than the usual household incandescent sources. Another explanation. I've noticed...

And he's already halfway there! Congratulations on 12K! :beer: Given the nature of this site I think 16384 will be the next significant milestone.

Whenever one or more of the following comes to pass: 1) I need apps which won't work on XP 2) I upgrade to a setup with more than 4 GB of RAM, and therefore need 64-bit support 3) Hell freezes over

No surprise here. The old adage you get what you pay for is especially true with CFLs. CFLs fail mostly because you really can't design decent ballast electronics for the price these things are selling for. Back when CFLs cost $20 and up they seemed to be more reliable. But people complained...

A refrigerator is perfect for LEDs. LEDs love cold, and aren't affected by the on-off cycling like CFLs.

Happy Birthday, Mark! :b-day: Happy Anniversary paugie! I'm glad those were 36 mostly happy years for you. My parents were less than 3 months short of 45 years when my dad passed away, but those were 45 mostly miserable years for both of them. Needless to say it's colored my views on marriage.

The tooth was sound until the filling came out about a year ago. I still have two wisdom teeth (and all my other teeth except one molar-#31 for those familiar with how teeth are numbered). One was crowned 16 years ago, and the other is on one end of a three-tooth bridge. No reason to have your...

Worked for me with my recent dental work. I got 10% off, although it still cost me $3445 (2 crowns, 1 root canal, 2 cavities, cleaning). Still waiting for the dentist's finger to heal so he can do a wisdom tooth extraction. I think the reason some doctors might be reluctant to take cash has...

Do you still have cats? If so, the litter box, food dishes, or even the cats themselves, could be reinfecting you. Also, did you clean everything you're in contact with at work? These types of staph infections are really scary in that we have fewer and fewer antibiotics which work on them...

The rates are higher for newer houses for whatever reason. This house was built in 1952. And I think a big part of the reason are the pre-K and afterschool programs (both basically taxpayer-subsidized daycare as far as I'm concerned) here which many residents demanded. Even though they only...

Well in NYC, transportation is better. :D (You did predict I'd say that, didn't you?). Seriously though, road, rail, whatever, there are going to be days when getting around sucks big time. From what I hear, traffic in LA is no picnic, either. I know in NYC anyone driving into Manhattan...

My mom gets a few hundred off her real estate taxes due to being a senior citizen but her annual taxes are still something like $3700, and this on a house which is now worth only about $525K. In fact, the taxes have still been rising even though the appraised value has been dropping (it peaked...

I watched an episode of Kramer where he essentially said the same thing. The market right now is insane. In my opinion the only thing an average investor should touch are mutual funds. Individual stocks are too risky, especially considering that prices for many stocks are easily manipulated by...

I don't doubt that the batteries are capable of 10 minute recharge. However, a 110V outlet cannot supply the amount of power needed to recharge a ~30 kWh-hr battery in that amount of time. You would need roughly 200kW, or about 8 times what your typical 100 amp, 240V electrical service can...

First off, I agree with most here about using Excel. I use Excel spreadsheets to track the expenditures in my business. Much simpler than any accounting software, and I can customize it to my needs. Most accounting software, especially the ones aimed at businesses, have a lot of complex...

My average came at the expense of a lot of sleep. No free time to work or do anything else but study. Most of my friends were the same. My social life mostly consisted of the hour train ride home from school with my friends. Believe it or not I still miss those days. Something about working...

I don't get why. I scored 1320/1600 on the SAT (570 verbal, 750 math), made Princeton and Yale (chose the former), and was wait-listed at MIT (ultimately didn't get in). No GPA at my high school. We used numerical marks with 100% being the highest. IIRC my average was about 96.1. Regarding...

I'd say I was at the top of my game cycling in my mid-thirties, 5'9", 170 lbs of mostly muscle. Right now I'm about where I was in college except I'm carrying 30 more pounds. If I could manage to ride 100-150 hard miles a week I've little doubt I could get close to my peak again. Problem is...

Sad to say but reading further I think the guy is serious. And yes, I've come in contact with people dumb enough to actually do stuff like that. The thread gets funnier and funnier as it goes on. No time now to read it through, but just the first ten or so pages and my sides are hurting...

This thread is destined to be a classic of all time. Just read the first few pages to see what's going on. I was laughing my ass off by about the third page. :diablo:

I'm talking about car exhaust here, not the cars themselves. That's what's primarily degrading the quality of life, and what we now have the ability to get rid of. Large numbers of autos in one place can also cause problems regardless of whether or not they pollute, but that's a lesser issue...

Look, I really don't think CAFE standards are the best way to go about this but that's what the government chose. Had I been in charge, I might have went with a fuel tax instead. Even Clocker was on board for that. Or perhaps simply emissions regulations. But the end result would be the...

Having a car isn't a birthright. I'd like to live in a penthouse on Park Avenue but guess what? I can't afford it, so I don't. I can't afford a car, either, so I do without (wouldn't want one in their current incarnation anyway but that's another story). That's what good old capitalism is all...

First off, read this. You're going on the incorrect assumption that car buying habits are going to remain the same as they were in the period from the early 1990s through about 2006. You're wrong. Trends come and go in any industry. The SUV was by and large a silly fad which is thankfully on...

If there's any one constant in business it's that you generally have to more heavily advertise things people don't want as opposed to things they do. The automotive market is no different. In the absence of any advertising, the majority of car buyers would just care about getting from point A...

I think at this point the "hydrogen highway" concept is as dead as a door nail. It offers no advantage whatsoever over today's much better batteries, and has lots of drawbacks (extra complexity, cost, the need to carry a very dangerous fuel). Sure, electrics need charging stations. If enough...

Sorry to hear the bad news. :( As for your brother, I also don't understand why people don't save. I've heard of former brokers who are now desperately looking for any work. Seems strange to me. If I made half a million a year for five or ten years like lots of these guys did I'd be set for...

Reading through some other links, there has been some success making sure the registry key HKLM/SOFTWARE/Microsoft/WindowsNT/CurrentVersion/Drivers32/aux = wdmaud.drv. Mine had some junk file name in there. I fixed it via Regalyzer since Regedit wasn't working. Everything is back to normal...

Update: System is still doing the same thing. No malware whatsoever found with Spybot S&D, Malwarebyte's Antimalware, Avast Antivirus, AdAware, or HijackThis. All that was found was tracking cookies and a little other relatively harmless stuff. Forgot to mention that Google searches have...

Well, it turns out that 32-bit Vista already has the tools to use RAM over 4GB. They just aren't enabled by default. But doing so might be violating your license agreement. (very interesting article discussing a lot about how Windows accesses memory)

If figured it might be something along those lines. So far though I haven't encountered any problems with no pagefile. I guess in the cases you must have a pagefile for Windows to work properly, putting it on a RAMdisk makes a lot of sense.