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  • Users: mgopalan
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  1. mgopalan

    Faraday and Lenz

    Have a thought question I am having problems with. If I have a coil of wire...say something simple wound around a paper towel roll or something. And I move a permanent magnet inside it. Completely inside it. If the magnet is a lot shorter than the length of the coil of wire, any movement of...
  2. mgopalan

    Funky Axial Power Generation

    Wondering what if any work has been done in building practical axially moving magnet power generators with real power ouputs. I have an application where I have a lots of random axial vibration available (think of a giant hammerdrill) and I wanted to scavenge power out of the...
  3. mgopalan

    Removing Silkscreens from IC's

    Was wondering if anyone knew a good solvent to remove the silkscreen on top of IC's. I have a product with 7 small PC boards but need to remove the Identifiers from certain IC's (SOIC, TQFP and a couple of LCC's) to deter certain types of individuals.... Obviously, would be nice if the solvent...
  4. mgopalan

    4-20 mA Shielding

    I have an application where I have a 4-20 mA transducer at the end of a 250 ft long cable. Plus, this entire setup up is in a nasty environment electrically (lots of RF and generator noise, think oil rig with gigantic generators, motors and nasty power). I am using a 4 conductor (2 twisted...
  5. mgopalan

    4-20 mA loop sheilding

    I have an application where I have a 4-20 mA transducer at the end of a 250 ft long cable. Plus, this entire setup up is in a nasty environment electrically (lots of RF and generator noise, think oil rig with gigantic generators, motors and nasty power). I am using a 4 conductor (2 twisted...
  6. mgopalan

    Intrinsic Safety

    I am trying to understand the process of designing intrinsically safe equipment for use in a Hazardous area...I need to place a Panel PC in the hazardous area and run data from it from the hazardous area to the safe area. I already have the PC specd out and it is rated class 1 div 2 but where...
  7. mgopalan

    Thread Design Freeware

    Am looking for freeware or shareware that will let me calculate Mjor, Minor & Pitch diameters of Stub Acme threads without having to do it by brute force out of my Machinery's Handbook.. I once had a cool program (DOS based) that would provide all the above and more information (Shear Area...
  8. mgopalan

    WIRELESS PC MONITOR

    Our field equipment requires that we set up a PC monitor that shows our laptop screen to another location (about 100 ft away). So far we have been using 100ft VGA cables but I am sick and tired of dealing with cut wires and idiots with forklifts... Does anyone have any info on a wireless...
  9. mgopalan

    Pattern Along a Helix

    How do I create multiple instances of a feature (like a boss) along a spiral (helix)? For example, if I want to take a long cylinder and drill holes on it O.D in a spiral pattern what can I do? I know that I can brute force this by creating as many offset surfaces I need and creating the...
  10. mgopalan

    DC Motors in Oil

    A project I am working on requires that we use a DC Motor in an Oil Fileld Environment. This is due to hydrostatic Pressure compensation issues. The motor that I have selected and designed into the system was tested over this last weekend and started to show some problems. The motor was filled...

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