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Recent content by Johnnyquest

  1. Johnnyquest

    about Mathematica code question

    It means it will plot the table values of the function Sin[x + z] Cos[z] in the rectangular window xmin -9, xmax 3Pi, ymin -1, ymax 1. It will plot the default points of x and plot z with the range of 0 to 2Pi in increments of .2 Hope this helps. JohnnyQuest
  2. Johnnyquest

    Need Help Plotting 3D Lemniscate of Bernoulli in Mathematica

    Hi I am trying to plot a three dimensional Lemniscate of Bernoulli in Mathematica. So far I have only been able to make a 3D ribbon but would like to make a tube. I know my formula needs to be changed, could someone please point me in the right direction? Here is what I have so far: knot1...
  3. Johnnyquest

    Physics for Scientists and Engineers , Solution Manual (req)

    Re: Physics for Scientists and Engineers , Solution Manual ( I am looking for the Test Bank not the Solutions Manual...
  4. Johnnyquest

    A CHEAP XRAY machine to align BGA circuits

    bga circuits You are going to need at least 50kV for penetrating a BGA and up to 1mA of current. Most TV flyback only produce up to 30kV. I previously worked at an x-ray tube company here in the US. You can use a CCD camera but you need some material to coat the lens so that when x-rays hit it...
  5. Johnnyquest

    Toshiba CS-3521R Television Schematic Needed

    Need schematic for Toshiba CS-3521R Television Mfg. Date Jan 1991
  6. Johnnyquest

    Can you correct PF using PIC ?

    Re: PF correction by PIC ? There is an App Note from Microchip's web site that talks about using a PIC for PFC h**p://ww1.microchip.com/downloads/en/AppNotes/30450c.pdf
  7. Johnnyquest

    Physics for Scientists and Engineers , Solution Manual (req)

    Re: Physics for Scientists and Engineers , Solution Manual ( Does anyone have the Test Bank for the 6th edition of Physics for Scientists and Engineers by Serway or any other material besides the Solutions Manual?
  8. Johnnyquest

    req: schematic for flash-based PICStart Plus programmer

    16f682a I made the upgrade board according to the PicStart_upg.pdf and connected pin 19 of the 18F6720 to +5v which the schematic did not show. I programmed the board using the Picstart + and it worked fine. I tried the programmer with the upgrade board, updated the os throgh MPLAB update...
  9. Johnnyquest

    "Eraser Head" mouse interface IC?

    Does anyone know of any interface IC's or schematics for what some call an "eraser head"; pointing stick; IBM calls it a TrackPoint; that is used in laptops as a mouse in the keyboard?
  10. Johnnyquest

    PIC switch mode power supply?

    Has anyone seen any designs of a switch mode power supply with a PIC or possibly another MCU as long as it has 3 PWM outputs like the 17C756?
  11. Johnnyquest

    Building a PFC for 3KW buck-converter

    PFC stand for Power Factor Correction. Power Factor is the ratio of Working Power to Apparent Power.
  12. Johnnyquest

    Different methods for PCB etching

    Is this method better than using sodium persulfate? Where can you purchase Cupric Chloride?
  13. Johnnyquest

    Guide to making Network Analyzer

    In this zip are files on how to make your own network anaylzer of a couple types. Uploaded file: **broken link removed**

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