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  • Users: dumbo
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  1. dumbo

    fast switching emitter and detector

    Possibly If I refer you to http://www.imagineeringezine.com/ttaoc/detector.html The Silicon PIN Photo Diode
  2. dumbo

    Optically isolated light dimmer

    It seems logical that a remote dimmer would accept IR
  3. dumbo

    Help! - Constant Current Sources

    To start with What kind of voltage reference do you have ? Or which Vreference would you use to make a CC source ?
  4. dumbo

    Crystal Oscillator

    power the IC. 10M across first gate only. 10 pF on the 330 K side 22 pF on the other.
  5. dumbo

    Can a Diode be used as a Resister

    Jfets with the gate tied and mosfets are used as variable resistors fundimental to digital control.
  6. dumbo

    color sensing tranducer.

    A null happens when you look at red through a red lense and blue through blue blockers and green ect. When the three different colors are emmited in the right combination of intensities a color will be zip. The info is collected by a a/d and data placed in a file and processed.
  7. dumbo

    Constant Current Source

    using ohms law the current is inversely proportional to voltage. The accuracy involves temperature coefficients. If you start with tight voltage and compensated op-amp the result is I=V/R +/- delta T Some of the finest start very low and stable and amplify. Example: you have 10uA that is...
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