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Recent content by BlueBeam

  1. BlueBeam

    5V/24V DC-DC converter?

    Hi all! Thanks again for all the replies. However, it seems to need a little more explanation. nbucska - we have an industrial device, which was originally designed for 24V DC power supply. This is provided by an AC/DC adapter for ´normal´ use. Now we´ve got customers with system-internal 5V...
  2. BlueBeam

    5V/24V DC-DC converter?

    Thanks for the help, guys! The problem is, i am indeed looking for such a little 4pin, PCB-ready, "i have nothing to do" black box, 5V to 24V @ 30W output. [ponder] Guess, i can shake it... Walker, thx!, the links are quite useful and i´ve already startet some simulations. Problem here: either...
  3. BlueBeam

    5V/24V DC-DC converter?

    Hi there! Does anybody know of a commercially available (step up) 5V to 24V DC-DC converter? Where to find that? Until now my search for a vendor was not successful. In case that it does not exist, any ´simple´ idea how to build this function? The required power is around 30W! Thanks in advance!
  4. BlueBeam

    Anisotropic material thermal modeling programs

    If money doesn´t matter to you, i´d suggest a suitable modul of the ANSYS world. Even DesignSpace (for the ´support´ of construction) could be modified to handle anisotropic material properties. I´m still fightin to get it! ;)
  5. BlueBeam

    Protction from Sun rays

    Well, metals have indeed special properties with radiation. And it seems that aluminum has a high reflectance for IR (heat radiation). Don´t ask me for UV. So, an umbrella made of aluminum (or at least with an aluminum layer) should work. Furthermore i actually wrote the same as Martin, that the...
  6. BlueBeam

    Protction from Sun rays

    Hi! Funny question here, because it reminds me to a quite long discussion i had during my study. Well, the conclusion was that the color you SEE is not relevant. Since you ask for the thermal properties you must consider the IR-range of the sunlight. This is in fact the reason for the heat you...
  7. BlueBeam

    Optical measurement of 1 micron dimensional changes

    If you really want to see objects in a range of a micron (or at least with a good resolution of 1 micron) with ´normal´ optics you will have a problem. With all usual microscopy the resolution is (theoretically) limited to the wavelength of the illumination. Since visible light is in a range of...
  8. BlueBeam

    Spring Design û Change in Diameter with Compression

    Hi, I´ve also learned a lot of formulas about such stuff, but in the end its only important that it works. For ´springs´ you probably want to use, you just multiply the nominal OD with 1,166667 and round up the result on one place after the comma. regards, MT
  9. BlueBeam

    Anodizing AL....thermal conductivity?

    Anodizing means adding a layer of alumina to the surface. The thermal conductivity of this oxide is worse than for aluminium, but you always have a very thin layer. The difference is only the thickness of this layer and it is interesting for the area of direct heat transfer. Here i expect better...

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