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  • Users: nbucska
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  1. nbucska

    Memory mapping ( PC +DOS or WINDOWS )

    When adding a new memory mapped peripheral what is the best way to find an unused address ? ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  2. nbucska

    Can BACKUP to CD under DOS 6.22 ?

    and of cource restore from it ? Plesae read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  3. nbucska

    Artificial organs ???

    I have seen a kidney preparation where they filled the blood and urine vessels with plastics of different color and dissolved the tissues. Could'nt similar methodes be used to make artificial lung,kidney, etc.? Plesae read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  4. nbucska

    pH sensor for soil?

    Can you please recommend type and perhaps vendor ? Plesae read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  5. nbucska

    measure available charge

    Is there any reliable way to measure/calculate the available charge in rechargeable batteries of different types ? May measure and use current and/or voltage history during previous charges and discharges or measure internal resistance and temperature. Plesae read FAQ240-1032 My WEB...
  6. nbucska

    Is this possible ?

    Humid air contains more energy than the same amount of dry air and water at the same temperature. Would it be possible to take humid air ( e.g. at sea ) compress it, with heat exchenger cool it, precipitate the water and recover the energy from heat and pressure to drive the compressor. Would...
  7. nbucska

    Fluid mech. eng: help needed

    Please read thread239-157345 Plesae read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  8. nbucska

    Delay in I/O of PC

    working with an 800 MHz Pentium I measured the widths of the IORW and IORD and both were about 1 microsec. 800 Tclk is a lot... What controls it? could I shoorten it ? How ? Plesae read FAQ240-1032 WEB: <http://geocities.com/nbucska/>
  9. nbucska

    reading/convertin EXCEL files

    I have to write a program which extraxts alphanumeric info from one or more single or multipage EXCEL files and convert them to ASCII format for further processing. Any help is welcome. <nbucska@pc33peripherals.com> omit 33 Use subj: ENG-TIPS Plesae read FAQ240-1032
  10. nbucska

    non-polluting fuel for small engine

    Which fuel would cause less pollution in a small engine butane, ethanol, methanol, or any other reasonably priced fuel ?
  11. nbucska

    Hg in batteries ?

    If I remember correctly, the Zn-C batteries contain some Hg used to protect the Zn from corrosion during storage. Anyone knows how much ? Do they represent some environmental risk ? <nbucska@pc33peripherals.com> omit 33 Use subj: ENG-TIPS Plesae read FAQ240-1032
  12. nbucska

    Algae for fuel?

    I have read somewjere that algae can be grown for startch or oil -- depending on the groth medium. Single cell organism grow and mutate faster. Wouldn't be possible to develop a strain and method for growing algae for fuel ? <nbucska@pcperipherals DOT com> subj: eng-tips read FAQ240-1032
  13. nbucska

    lens with &quot;float glass&quot; process ?

    A small glass pellet of measured size melts on a tin (?) bath and contracts. A large pellet gives a slightly rounded disc, a small one a flattened sphere -- between the two extremes there must be a combination of size, temperature, gravity etc. which gives a lens which is closest to the...
  14. nbucska

    Switch lifetime at a capacitive load

    The lifetime of a switch is usually 10,000 cycles at AC line voltage. How does the lifetime changes if I use it to switch a 12V circuit which has 1000 uF input filter and much lower steady state current ? <nbucska@pcperipherals DOT com> subj: eng-tips read FAQ240-1032
  15. nbucska

    Wish list

    I would be interested what kind of IC or semiconductor functions my colleagues may consider desireable. I start the wish list with a high voltage(>400V) low current (Is << 1 mA ) MOSFET ? In the same time I am asking anyone who knows of such devive on the market to share with us this info...
  16. nbucska

    cheap development system

    Anyone knows about free or cheap development system for microcontrollers (HW and SW) please post data and prices. <nbucska@pcperipherals DOT com> subj: eng-tips read FAQ240-1032
  17. nbucska

    IC market experts : HELP !

    Today I have spent one hour searching for the data sheet of an IC made originally by MOTOROLA in 1996. I wasn't able to find out who makes it now? Could anyone who knows the IC market please post here the "family tree " of the IC manufacturers or any help you can give us to find the data...
  18. nbucska

    Is this chip possible?

    Is it possible to combine on a single chip: 220 AC SCR + HV FET+ IR diode + op.amp + some logic with at least 1 bit of flash memory ? <nbucska@pcperipherals DOT com> subj: eng-tips read FAQ240-1032
  19. nbucska

    transfer switch problem

    two new 4 pos. "data transfer switch"-es,unknown and unmarked MFR,( contains 4 pos,multipole rotary switch only, used to switch monitor and keyBd to 3 PC-s, separate mouses) failed after few days: Most of the times after switching PC, the mouse don't work on one computer until it is rebooted...
  20. nbucska

    circuit solutions

    There are circuit solutions some of us are not aware of: (Numbers are first approximation ) 1.)For a few inputs and outputs with millisec. response time: embedded processor e.g. PIC, 8045 etc. 2.) For 8-14 inputs and 8 outputs, simple combinatorial and/or up to 8 FF and microsec response: GAL...

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