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Caswell 3.5” WTC question

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  • He Who Shall Not Be Named
    replied
    Originally posted by SSN687 View Post
    Thanks, makes sense now
    Buy Bob's book! Remote control submarines | The Nautilus Drydocks (rc-submarine.com)

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  • SSN687
    replied
    Thanks, makes sense now

    Leave a comment:


  • He Who Shall Not Be Named
    replied
    Originally posted by SSN687 View Post
    8/26/2021 PM
    OK, thank you for your answers, I’m a dumb a**. I don’t remember seeing these components installed in other WTC, why would these components installed?
    Likely because if you blow up the ESC, you also loose all hotel services, which means no fail-safe. A BEC wired off the main power cable will provide hotel services to everything, directly through the receiver bus.

    David

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  • SSN687
    replied
    8/26/2021 PM
    OK, thank you for your answers, I’m a dumb a**. I don’t remember seeing these components installed in other WTC, why would these components installed?

    Leave a comment:


  • Bob Gato
    replied
    Google is our friend-and the other one is: http://www.taitroncomponents.com/cat...eet/lm2940.pdf

    Leave a comment:


  • trout
    replied
    The one with 7805 looks to be a linear voltage regulator.

    Leave a comment:


  • SSN687
    started a topic Caswell 3.5” WTC question

    Caswell 3.5” WTC question

    8/25/2021 PM
    David
    I just purchased a 3.5” WTC. The WTC was purchased from Caswell and the previous owner never got it working. I figured out the correct receiver channel and powered it from a 2S battery, I don’t have a 3s battery right now but it requires a 3S battery, and everything worked. I cannot figure out what these black boxes are for in the WTC. The ESC servo connection red power line is taped over and not used.

    WTC-1 & 2 – the part is powered from the battery and goes to a channel in the receiver. (Some sorta voltage regulator)
    Labeling as best as I can tell
    NL
    50
    ^^ MC
    7805CT
    NLBU947


    WTC-3, 4, &5 – the part is on the black lines on the ESC. (I have no idea)
    Labeling as best as I can tell
    JM990A??
    LM29400
    +5.0 P

    Thanks
    Ernie


    WTC-1
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    WTC-2

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    WTC-3

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    WTC-4

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    WTC-5

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