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  • Users: eromlignod
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  1. eromlignod

    Best way to bus many cirucuit boards?

    Hi: I have an application where I have many (50+) individual, very small circuit boards, each with its own independent microcontroller. Each circuit takes more power than would be practical for batteries, so I have to run a power bus to all of them (+24, +5 and ground). I also have synchronous...
  2. eromlignod

    Oxidation as in situ insulation?

    Hi guys: I am a mechanical engineer with an application where I have steel and brass contacting each other at a point (think of two spheres contacting each other). I need to electrically insulate them from one another, but it is impossible to add a physical insulator between them in this...
  3. eromlignod

    Jacob's chuck for a Hougen mag drill?

    Hi guys: I recently bought a Hougen magnetic drill press for drilling holes through the tops of machine bases on Ebay. It works great for trepanning large holes with rotabroaches. I would like to also use it for drilling and tapping with ordinary jobber drills. Is there any way to adapt...
  4. eromlignod

    Bearing lockwasher source?

    Hi guys: I have been buying bearing lockwashers for years from a local source. Well, now they have gone out of business and I can't find another source. Does anyone know of somewhere I can purchase these washers in small quantities? The kind I'm talking about are the ones that look sort of...
  5. eromlignod

    PCI-Express communication with Xilinx FPGA?

    Hi guys: First of all, forgive me for being a dumb mechanical engineer...FPGA's are new to me. I'm programming a Xilinx Spartan-3 FPGA development kit. I'm doing pretty well so far. I've gotten my huge Verilog program written and finally got it to simulate correctly and set up all the I/O...
  6. eromlignod

    Sharing Memory Between Processors?

    Hi guys: I'm an ME and I have an application where I'd like to use two Basic Stamp microcontrollers working together. One is the main processor that runs the show and does calculations; the other is a dedicated slave that constantly distributes a series of 16-bit numbers to various devices...
  7. eromlignod

    Can Carbon Fiber be Plated?

    Guys: I have a small part made from rigid carbon fiber composite that has been machined to size. Is it possible to electroless plate it with metal? It is for cosmetic purposes: I want the part to look like it's made of brass. I suppose if I can get a base plate of any type metal, I can plate...
  8. eromlignod

    Transparent Rubber?

    Hi guys: I'm looking for a material in an application that must be somewhat "stretchy" and spring back, like rubber, but is optically transparent (not translucent). It can be thin and doesn't have to stretch a whole lot, but more than solids like lexan or polycarbonate. Is there such a thing...
  9. eromlignod

    Zap a volt regulator w/ no cap??

    Hi guys: First of all, forgive me for being a dumb ME meddling in electrical work. I have an application in a machine that has a 24-volt power supply. I have a tilt sensor (analog output) that needs 12 Vdc as its input supply. Until now this part of the machine used an embedded circuit that...
  10. eromlignod

    Charging multiple lead-acid batteries with one charger

    Hi Guys: If I want to charge, say, ten 12V lead-acid batteries all connected in parallel, can I use a single battery charger? Would this just mean that it will take ten times as long for the batteries to charge as for a single battery? Will there be problems with the charger eventually...
  11. eromlignod

    Brass that insulates

    Hi guys: I'm looking to replace a small brass part in an application. The replacement material has to have a tensile strength and surface hardness at least that of brass and must be tough enough to take a hit now and then like brass without shattering. It also needs to be machinable...maybe...
  12. eromlignod

    Maximum output current for battery

    Hi guys: I have an application where I would like to provide low-voltage/high-current power from deep cycle lead-acid batteries. I understand the concept of "amp-hours" and what they mean to the life of my battery charge. What I don't seem to be able to determine from the battery literature...

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