One fo the electronics/PCB board Gurus out there

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  • Drcemento
    Tiger Stripe Enthusiast
    • Aug 2021
    • 734
    • NorCal

    #1

    One fo the electronics/PCB board Gurus out there

    Early, early revy loaders had the Board and switch nicely tucked into the actual servo. When I built my VL-90 revy I was able to take a later Model revy servo and drill for the switch and install the Old board in the new servo - making for much faster and more reliable unit. I have a few revy servos a bunch of old VL-90's. What I need is the small boards. I've got limited eletronics experiece, but even I can see this was a dirt simple board. I want to get a small run of these boards made. so - a few questions
    • anyone want to draw this up for me in one of those PCB builder programs? happy to pay for the help. I know I can do the soldering and have allot of the resistors ect on hand.
    • why did VL make what looks like an insanely over complicated board in the later revy's?
    • are there improvements worth doing in a new version?
    here's the old board
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    and the new board:

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    and what I'm creating:

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  • nerdcore
    Sweet Liberty, my arm!
    • Jul 2020
    • 512
    • Crashville

    #2
    The newer one has a lot of surface-mount parts, which is where the electronics industry has gone, for smaller profiles, smaller devices, etc. Only improvements really are moving the external connections to the 4-pin molex or whatever, vs all the separate wires hanging off the board. New board also has battery contacts on the belly, instead of a battery connector.

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    • Drcemento
      Tiger Stripe Enthusiast
      • Aug 2021
      • 734
      • NorCal

      #3
      Its a rainy lazy day, and my brain won't let this one go. so out came the Make: Electronics book and a pencil to try my hand at making schematic for this board. got a little lost at the switch - I can't see where the lines go underneath it, but I have a better understanding of whats going on now. here's what I came up with:

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      • XEMON
        Frenchy is here!
        • Jul 2020
        • 3029
        • Nor Cal

        #4
        Are you wanting to fab a few board?

        I'll check my revi but I think the one I have is pre-board ...
        If you pass one to me I can draw it out and get a few made (or make a few by hand/cnc maybe)
        Love my brass ... Love my SSR ... Hard choices ...

        XEMON's phantom double sided feed
        Keep your ATS going: Project rATS 2.0
        My Feedback

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        • Drcemento
          Tiger Stripe Enthusiast
          • Aug 2021
          • 734
          • NorCal

          #5
          Originally posted by XEMON
          Are you wanting to fab a few board?

          I'll check my revi but I think the one I have is pre-board ...
          If you pass one to me I can draw it out and get a few made (or make a few by hand/cnc maybe)
          Ha- I should have thought to reach out to you! if it is an old revi Check inside the servo - thats where the "board" is on the older ones. literally three resistors a switch and two transistors soldered up on a glorified breadboard. I would love to make a small run of them.

          Comment

          • XEMON
            Frenchy is here!
            • Jul 2020
            • 3029
            • Nor Cal

            #6
            I checked both of my revys, one has the newer (18V) board and the other doesn't have a board at all (it's a first gen 9v without eyes), then I remembered I had some guts ... Somewhere ...

            Can you shoot me some close up pictures of the board and components?

            Click image for larger version

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            Last edited by XEMON; 02-16-2026, 06:11 PM.
            Love my brass ... Love my SSR ... Hard choices ...

            XEMON's phantom double sided feed
            Keep your ATS going: Project rATS 2.0
            My Feedback

            Comment

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