Search results

  1. J

    What is the "frame rate" of a human eye?

    Just for the record, I've driven LEDs for periods as short as 4nS (four billionths of a second), and the human eye can see the pulse just fine. However, it is dimmer, since the human eye integrates the light. If you put a blinking LED in motion, there is no problem seeing separate pulses at...
  2. J

    Which oscilloscope?

    Being an EE, I've used Agilent/HP, Tektronix, LeCroy, Hitachi, my Dad's BK Precision, and a variety of others. I'd always take an Tek over an Agilent/HP, unless I was doing just digital stuff. That said, LeCroy makes some nice scopes. I'd avoid the Tek 22xx series, unless they were cheap...
  3. J

    Recommend Radeon Graphics card for APU formobo crossfire (Liano APU- GPU+CPU) A6-3620

    Thank you for your time, I appreciate it. Hey guys, I'm scratching my head after a week of digging around. I've not been building computers much lately, I'd like to upgrade the graphics on my daughter's computer. I'd previously added Enermax 550W 80 Plus Bronze power supply to help...
  4. J

    10M dollar L-Prize winning bulb from Philips, review and teardown

    I have seen transistor based "fuse" circuits turn to molten slag, and the transistor become a short itself, resulting in zero protection. I've seen the same for 2500W transorbs placed before the circuit, to protect the transistor "fuse" circuit, turn into shorts and opens themselves (transorbs...
  5. J

    10M dollar L-Prize winning bulb from Philips, review and teardown

    Ah, I see now. At the prices, it makes sense, however they did test them, as well as abused the L-Prize bulb fairly throughly. Maybe a Polyfuse would make sense. Using a replaceable fuse might add too much cost. I updated the review, added shots of the Home Depot "Consumer" Blister...
  6. J

    10M dollar L-Prize winning bulb from Philips, review and teardown

    I'd rather have the link blow, than burn my house down. I once saw a CFL start smoking, then puffing, and it wasn't blowing the house breaker...
  7. J

    10M dollar L-Prize winning bulb from Philips, review and teardown

    Thanks for the kudos. The 2,000 to 4,000 hours is based on if that capacitor is running at 130 degrees C. It is probably at 50C, which would put it's lifetime around 128,000 hours. This isn't one of those junk capacitors your find in most failing CFL bulbs, motherboards, and computer...
  8. J

    10M dollar L-Prize winning bulb from Philips, review and teardown

    I've done a review giving education, review, and teardown on the new high performance LED light bulb from Philips, if anyone is interested: http://www.molalla.net/members/leeper/L%20prize%20bulb.htm
  9. J

    Mail, Vista64 to Win7 Ultimate

    I have W7U it has been sitting here for 4 months, but am running Vista64. Having access to old emails going back more than a decade is important to me, and I often do searches on them for information. (my sent email file is over 4 Gigs, with very little in pictures...) I was told that...
  10. J

    Whats after am3+ chips?

    For a decade many pilots have carried an EFB. In the Electronic Flight Bag, one can put all the manuals, drawings, checkout proceedures, emergency checklists, basically everything a pilot or even a technician could dream of having on his aircraft all in one handy little portable widget. It...
  11. J

    300 Lumens Mini CREE LED Flashlight. $6.62 FS

    Lumens describe the total amount of light comming out of a source of light, and it is very, very precise and is usually measured in an Integrating Sphere. Here is an example of an Integrating Sphere...
  12. J

    Partition Commander issue

    I may need to purchase new disk management software, what would you recommend if I can't fix this? I had to upgrade my OS to Windows Vista 64 bit. Windows Vista 64 refuses to boot because of a file, hotcore3.sys, and it didn't show up until I installed Partition Commander 10. I managed...
  13. J

    Why is my home network so slow at moving files around?

    If cross-over cables work with Gigabit Ethernet, I'd be tempted to go direct, machine to machine, which would take out all of the ambiguous/questionable stuff and narrow it down to the PC's involved and nothing else.
  14. J

    Which Garmin GPS?

    I recently used a Nuvi 350 up and down the west coast (+5,000 miles traveled), and it was a godsend on the sightseeing trip, and the voice prompting helped me navigate LA with ease, where I know I would have gotten as lost as a tumbleweed. It was also cool to not have to book hotels a day in...
  15. J

    LED flashlights

    Swell, I fixed the one broken link, thanks.
  16. J

    LED flashlights

    Thanks!
  17. J

    LED flashlights

    I recently did a number of reviews and testing on various PR bulb based drop-ins for flashlights. Links for the details are at the end, this is an overview. As far as the MagLED, as it's module heats up, the output is going to drop, and your eyes should adjust. MagLite was wise enough to...
  18. J

    MagLite 2C LED drop-in Technical Review

    Okay, thats the first time I've been called an uber geek by a computer geeky type person. Buddy, you'd probably be surprised at things I study in detail. And can you imagine, I served as a US Marine for 12 years. How do you think all these gadgets (DVD, Computers, IPOD, Blackberry, Cell...
  19. J

    MagLite 2C LED drop-in Technical Review

    The 2D MagLite 3W LED module is not a buck module. They use a boost circuit. Remember, a fresh set of cells is around 3.1V, and the LED's Vf is higher then the cell voltage. As such, they don't really switch over to direct drive, like some buck circuits do. I have not yet measured the...
  20. J

    MagLite 2C LED drop-in Technical Review

    The 20,000 mAH E95 Energizer Alkaline D cell has it's rating at a 25 mA discharge. The cell drops to 10,000 mAH at a 500mA discharge rate. The MagLite 3W LED bulb drop in, drops below 500mA within the first 10 minutes, and at 30 minutes, is around 420mA draw. As such, (quickly below 500...
  21. J

    MagLite 2C LED drop-in Technical Review

    I'm the one that first mentioned heatsinking, if you look up... Anyhow, it sounds like a great opportunity for someone to create one.
  22. J

    MagLite 2C LED drop-in Technical Review

    Since they are normally used in flashlights, it is quite meaningful, as cells naturally sag. But, the test is only 30 minutes long. If you know anything at all about D cell batteries, you'd know they have over 20,000 mAH capacity. Thus, during this time, the cells are only depleted less...
  23. J

    MagLite 2C LED drop-in Technical Review

    Okay, so what makes this sucker tick, and how does it actually perform? First, the drive waveform on the pins of the LED, from the switcher that is built in: http://www.molalla.net/~leeper/mag2cled.jpg I mounted the drop-in module into a 2D-Cell light, so that cell voltage drop...
  24. J

    The lies about Oil and the games we play

    It's been fun for the weekend, you know? It is not some weird fringe idea, check this out: AAPG- American Association of Petroleum Geologists, 2003: The AAPG Hedberg Conference on the "Origin of Petroleum -- Biogenic and/or Abiogenic and Its Significance in Hydrocarbon Exploration and...
  25. J

    The lies about Oil and the games we play

    Dr. Thomas Gold - is an enormously respected physicist who put forth in 1950, distant radio souces from the stars are galaxies, later proven - he said that the pulsing stars were neutron stars, it is now a fact (called pulsars) - before we landed on the moon, he said the moon was covered...
  26. J

    The lies about Oil and the games we play

    Another interesting article out of Wired magazine, interviewing a respected scientist, who has a great many accomplishments under his belt: And by pumping out oil from the highest reservoir you release the pressure on the lower ones, allowing more oil to seep up. Yes, the partial...
  27. J

    The lies about Oil and the games we play

    . F. Kenney Joint Institute of The Physics of the Earth - Russian Academy of Sciences Gas Resources Corporation, 11811 North Freeway, Houston, TX 77060, U.S.A. Ac. Ye. F. Shnyukov National Academy of Sciences of Ukraine Vladimirskaya Street 56, 252.601 Kiev, Ukraine V. A...
  28. J

    The lies about Oil and the games we play

    Actually, it is not hype. Please read this article fom Wikipedia linked below. "The capital fact to note is that petroleum was born in the depths of the earth, and it is only there that we must seek its origin." (Dmitri Mendeleev, 1877)[1] Russian geologist Nikolai Alexandrovitch...
  29. J

    The lies about Oil and the games we play

    It isn't just in sedimentary rocks. It is best to read things before you speak. If you had bothered to read something, you'd have not made that comment. They are finding oil now, up to eight miles deep, well below and beyond the sedimentary rocks. Deep into the basalt and granite.
  30. J

    The lies about Oil and the games we play

    The market forces are to continually create the opinion of a massive shortage, as they have continually been doing since the 1960's. This allows them to keep raising the price, and make more profit, while having to do less work for each dollar. Sorry, your comment doesn't hold water to me...
  31. J

    The lies about Oil and the games we play

    It is funny how oil is often found at depths way below any possible fossil deposits, and how there is never any evidence of strata processes that are found at the surface. Not to say that some oil isn't found near the surface, but there are some really vast deposits very deep within the earth...
  32. J

    And you though you were a geek...

    There are entire companies who's business is mainly based off that forum, its pretty big and popular in reality. Quite a few businesses actually sprung up out of those forums.
  33. J

    And you though you were a geek...

    LMAO, that ain't me!
  34. J

    And you though you were a geek...

    http://www.candlepowerforums.com/ubbthreads/showflat.php?Cat=&Board=UBB22&Number=468095&page=0&view=collapsed&sb=5&o=&fpart=1&vc=&PHPSESSID=
  35. J

    Bad Vcore regulation... any solution?

    Look at your voltage in the BIOS.
  36. J

    Testing HyperThreading in TMPGenc ***updated Mulittasking test*** A must see **added test 1/10/2004**

    Look really carefully.... 2.58 is a bogus version to be using, since they fixed it up after 2.58, specifically for HT, unless you are trying to directly compare to an old review. 2.58 is ancient, as well as 2.59 where they fiddled with the HT. Version : 2.59. 2002/11/14 Corresponded to Hyper...
  37. J

    Boost your Maxtor Performance, FREE!

    Armethius Well, so much for graduate level.... When a program has memory leaks, especially under Win98, it doesn't get recovered. Also, some programs do not release all the memory when you exit them. This leads to less and less memory left, and it starts impacting your system. Once you get...
  38. J

    2600+ barton at 2.2ghz, 1.85v, will it shorten life?

    I look back to my i233/MMX that has been overclocked since they were the hot item at the time, still runs fine, I look back at my Celeron 300a o/c at 450 since they first hit the shelves, both running 24/7 doing RC5/TSC ever since then, still no issues, both have decent core voltage bumps for...
  39. J

    Testing HyperThreading in TMPGenc ***updated Mulittasking test*** A must see **added test 1/10/2004**

    Now, have you done the first basic logical thing and gone back and benchmarked with the same exact version of TMPGEnc that was used in the reviews? Could it be that the code for the program was highly tweaked since that time? Sometimes programmers can't fix the root source for issues and may...
  40. J

    Testing HyperThreading in TMPGenc ***updated Mulittasking test*** A must see **added test 1/10/2004**

    Yeah, look at the revision history on this proggie! http://www.tmpgenc.net/e_main.html It makes full sense for a very poorly written program to see huge gains with HT on, due to portions of the CPU sitting around doing nothing....
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