Sync in SCART board guide 5V?

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  • December 12, 2025 at 5:34 AM #68001
    2mg
    Participant

      Hi,

      I’m looking at – https://videogameperfection.com/products/sync-in-scart-board/

      The guide for it is – https://retrorgb.com/syncinscart.html

      I’m just wondering, why is the guide connecting 5V (pin 8) from the TV side, not from the console side?

      SCART is bi-directional and I suppose TV does output 5V on pin 8, but the TV is the receiver in this scenario, so it shouldn’t be outputting 5V back into the SCART cable, no?

      How is this “5V conflict” resolved if I had just plugged a regular (no sync stripper) fully wired SCART cable from the console into the TV?

      December 12, 2025 at 6:57 PM #68009
      BuckoA51
      Keymaster

        Pin 8 is used for RGB voltage signalling, it’s not coming from the TV but from the connecting equipment.

        December 15, 2025 at 2:02 PM #68029
        2mg
        Participant

          I am aware, but the way it’s used in the guide I believe the author thought they can power the circuit board by using 5V from the TV, so is the guide wrong?
          These board are powered from the 5V from the consoles, no?

          March 5, 2026 at 2:23 PM #68851
          BuckoA51
          Keymaster

            He says to get the 5v from pin 8 which is status and aspect ratio up coming in from the device/console side.

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