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  1. zeitghost

    "celebrities" in engineering?

    Anyone who builds a working replica of a coalmine in his back garden gets my vote! As a practical hands on engineer, Fred Dibnah was one of the best. And he made good tv programmes too... Blaster Bates was another great entertainer and explosives man, but not necessarily an engineer in the...
  2. zeitghost

    "celebrities" in engineering?

    Fred Dibnah. Steam engineer...
  3. zeitghost

    "celebrities" in engineering?

    Hedy Lamarr pondscum? http://en.wikipedia.org/wiki/Hedy_Lamarr :o)
  4. zeitghost

    Fuse problem notification.

    Ah yes. The Chinese fuse thing... "What BS number do you want printed on the side of this chunk of 6 inch nail in a ceramic carrier?" Or variations on that theme. Though I seem to remember that there's a I*t (or I squared t) curve for a fuse that you might find it useful to look up.
  5. zeitghost

    Finding Case Temp

    I've seen the diode forward bias voltage used to determine die temperature in PowerMos die attatch testing. Sort of works.
  6. zeitghost

    directly install a driver?

    I tried that method many times with a disk controller card, CorBlimeyLimey and this: http://www.tek-tips.com/viewthread.cfm?qid=1391078&page=1 is how I eventually fixed it. By using an install routine from the chip manufacturer. I was ever so impressed with the CD provided by the card...
  7. zeitghost

    Toko Coil part numbers

    This says a lot really... http://mail.qrp-l.org/pipermail/qrp-l_qrp-l.org/20070411/004191.html In other words, toss the lot in the bin & forget about it... :o)
  8. zeitghost

    Current limiters/overcurrent protection advice needed

    The battery supply is about 13.8V. With enormous spikes from the alternator of 100V or more... Your circuit will probably have to survive reverse polarity battery connection too... There are MOSFETs available that have built in overcurrent protection. Automotive design is a joy.
  9. zeitghost

    old databooks

    I calculated that I had 3 tonnes (or tons) of books in my databook library... I then started distributing the load around before the cracks in the office ceiling below got any worse... :o)
  10. zeitghost

    LOW BATTERY CUT-OFF, REVERSE POLARITY PROTECTION

    I seem to recall that LDOs don't drop out as such, just stop regulating as the input voltage drops... The tail current goes up spectacularly though, if I remember correctly, as the thing tries to turn on the series pass as hard as it can.
  11. zeitghost

    old databooks

    Never ever throw data books away. I collected two car loads from one place that closed down.
  12. zeitghost

    Toko Coil part numbers

    Thanks for that; I can make no sense of any of it really. The coils are 7mm types in cans, and that's about as far as it goes... :o) Ho hum. What's even weirder, I can't match the numbers on coils I ordered myself tothe toko numbers in the ancient catalogue I've got... Sounds like the...
  13. zeitghost

    MS for 120A

    I'm not sure I'd term it specsmanship really. It's more about being able to make a repeatable measurement of a parameter without something melting or searing the operator's fingers... Unfortunately it also means that you can't directly transfer the datasheet values to your average...
  14. zeitghost

    MS for 120A

    Ah yes. For example: Id(on) 150A (note 2) note 2: Measured for 300us at a 2% duty cycle sort of thing... :o)
  15. zeitghost

    Communication with serial COM ports

    If you are using dos, then: http://www.amazon.com/Programmers-Guide-Serial-Communication-2nd/dp/0672302861 Hard going though. There's a shedload of comms stuff in C on the web. What operating system?
  16. zeitghost

    Vintage Blast Furnaces of the World

    About 40 odd miles from it. Come to think of it, there's also the Neath Abbey Iron works which is very local to me, about a mile away. The Neath Abbey Iron Works was involved with the very early iron ships. This area of South Wales was intensely involved in the Industrial Revolution. Swansea...
  17. zeitghost

    Toko Coil part numbers

    Does anyone know the rhyme or reason behind Toko part numbers? I've got some that I bought, so I know what they are, but the numbers on them don't seem to correspond to the parts catalogue... For instance, I have 90D0-162-002-86023, which I didn't buy. How do I figure out what that is? I've...
  18. zeitghost

    Vintage Blast Furnaces of the World

    Blaenavon Iron Works in Wales. Now a World Heritage Site (!). Merthyr Tydfil might have something left too,if they haven't knocked it all down yet...
  19. zeitghost

    SMPS current not rising higher despite saturation.

    You can get a halfway decent psu for a lot less than that these days. CPC seem to do reasonable range starting from about £35... as do Maplin.
  20. zeitghost

    SMPS current not rising higher despite saturation.

    Don't security notice when people walk out with a psu stuffed down their trousers?

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