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  1. nbucska

    Calculating the accuracy of industrial instrumentation loops?

    No. You may have noise between the sensor and the amplifier. A loop with an integrator zeroes out the static errors but not the dinamic ones. The whole control loop has to be analyzed. ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  2. nbucska

    Microscope slide w/Hi themal conductivity

    How big is the field of view of the microscope ? Do you have to move it (scan across the plate ) or can it stay stationary? I am thinking at adding transparent resistor to hear it and TC to measure it. ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  3. nbucska

    Microscope slide w/Hi themal conductivity

    I made once a thermostat for microscope slide -- I may be able to help but I have to know much more. Otherwise the only advice is : Investigate the possibility of depositing diamond on a metal plate and etching away the metal where it has to be transparent. ---------------------------- Please...
  4. nbucska

    Noise figure measurements

    Leiser: The FT is a tubular capacitor; the inner electrode has one lead which is coaxial with both electrodes and protrudes at both ends . The outer electrode of the C is a solder plated ring to be soldered around to the perimeter of the hole in the shield. Its effect is equivalent to a...
  5. nbucska

    SNR of a pulse

    The reason to quantify the S/N ratio is that it effects -- in the case of old, analog AM determines -- the error rate. The error rate in the case of digital communication is much more complex -- e.g. in the sixties there was a Saturn fly- by and the returned picture -- in spite of the...
  6. nbucska

    Thermistor

    Jkelly: Sorry for not answering your question, so *** YES *** ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  7. nbucska

    Thermistor

    Keith: I suggested the micro, the OP is not willing to read my FAQ or disclose any more info. ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  8. nbucska

    Thermistor

    Resistors are temperature dependent, too and there are thermistors with different -- even positive or negative -- temp. coeff. The networks you have found combine these effects to improve the linearity. On a single 6 thermistor temp. sensor you may reach .5C accuracy by calibration. The...
  9. nbucska

    Noise figure measurements

    I would select a linear -- non-switcher -- PSU which can supply more than enough current , add more electrolytic and ceramic caps with short leads AND FINALLY: ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  10. nbucska

    Thermistor

    For what temp. range? How many? any other requirements? ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  11. nbucska

    Small Optically clear fluoropolymer beads w RI ~1.36

    Glass beads are made for sintered chemical filters in about this size by the lb-s. Wouldn't it do? ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  12. nbucska

    SNR of a pulse

    The signal to noise ratio may be irrelevant in a digital system. I had e.g. a system where the digital pulses were a few millivolts in the noise of a few volts and the raw -- uncorrected -- error rate better than 1 in 1 million. To give any help we need much more data ( see my FAQ ) What is...
  13. nbucska

    linear / non-linear magnets and orientation of magnetization

    Every magnet is non-linear-- linear only within a small enough range ,if you stretch the definition of "linear" ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  14. nbucska

    2 volts relay?

    If you just need one, you may rewind a relay for lower voltage. The wire diameter is squareroot ( V1/v2) times of the old one ( well +/- 15% is OK ) ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  15. nbucska

    2 volts relay?

    How many amperes ? You may want to consider electronic switch -- solid state relay or some custom circuit. How many do you need ? any other consideration ? Space, cost, reliability, etc ? Is the load inductive -- e.g.motor or solenoid -- or incandescent ? ----------------------------...
  16. nbucska

    2 volts relay?

    How much current do you switch and DC or AC ? Read switch with custom coil? ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  17. nbucska

    Converting low amperage signal to high current

    op.amp with a transistor or power op.amp ( simpler but more expensive) ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  18. nbucska

    Heat Rejection

    Isn't fermentation an exothermal process, too? If the liquid stays in the building 100 % of the pumps energy input stays there, too. ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  19. nbucska

    p-channel depletion mode fet

    Can't you use Jfet ? ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>
  20. nbucska

    help with potters wheel

    or post it at http://www.engineeringforum.org/ -- they are more tolerant.... ---------------------------- Please read FAQ240-1032 My WEB: <http://geocities.com/nbucska/>

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