Up Periscope and the Seaview

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  • mickelsen
    Lieutenant
    • Aug 2008
    • 94

    #1

    Up Periscope and the Seaview

    I have an Up Periscope video camera and goggles. I would like to install the camera in my Seaview. Are there any specific instructions for using it that way? I see a couple of issues that I will need to address. First, the coax cable for extending the antenna will have to be a lot longer. How long can it go? Second, there is that thick portion of the window frame right in the middle. Do you offset the camera to the side so it can see out? Third, has anyone done anything with a low voltage drop-out regulator for the camera so that it can run off the 7.4V main batteries? Are there any other issues with the Seaview that I haven't thought of?
    Thanks for the help,
    Hope is a harsh mistress!
    Mark
  • KevinMc
    Commander
    • Feb 2009
    • 305

    #2
    Hi Mark,

    In principle you can extend out the length of the antenna coax to what ever you need, but understand that some of the signal you're trying to get to the antenna will "leak" out through the extension. Exactly how much will leak I can't say, but there will be a measureable loss in signal for increased antenna extension length. (Of course this doesn't mean that you can't extend it to the length you desire, I just can't tell you to an absolute how long you can extend it before the transmitted signal is nolonger practically useable.)

    As for the regulator - the camera I have has one built in to the battery adapter plug. Here's what I found when I cut mine open...

    Click image for larger version

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    If your camera is anything like mine then this "adapter port" plugs in to a 9V battery snap, so you're sure to be fine subbing in the lower 7.4V from a LiPo instead of 9V from the transistor radio battery. Just make sure you keep the reg in your circuit - the auto-exposure of the camera will suffer something aweful without it!
    Kevin McLeod - Oscar II driver
    KMc Designs

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    • mickelsen
      Lieutenant
      • Aug 2008
      • 94

      #3
      Hi Kevin,
      Mine has a 78L05 in a TO-92 package with a couple of SMD caps in 1608 packages. I know that it should work on 7.4v, but it's close. I've got an LM2931. I've ordered the necessary caps in the same SMD packages. (Finding a 100uf cap in that package was interesting...8^D). I ought to be able to substitute all the parts to make an LDO regulator. Then I found this:

      http://store.flytron.com/video-equipments/93-tiny-5volt-regulator.html

      I
      can't tell the exact size, but it should be much smaller than a 9v battery.
      Thanks.
      Hope is a harsh mistress!
      Mark

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