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advantage and disadvantage between TV out and VGA? — Parallax Forums

advantage and disadvantage between TV out and VGA?

ayumeayume Posts: 19
edited 2011-12-12 08:10 in Propeller 1
morning.. :)

i want to show the position of a node in wireless sensor network, but i'm still confused to choose TV out or VGA that i want use.

anybody can explain advantage and disadvantage between TV out and VGA please...

Comments

  • Cluso99Cluso99 Posts: 18,069
    edited 2011-12-11 17:20
    It really depends on what screen you have avaiable. TV is actually composite video and typically uses a Yellow RCA connector (2 wire) and comes in two variants NTSC and PAL. VGA is typically available on computer monitors and uses the HD 15pin clunky connector.

    TV uses 3 prop pins and 3 resistors (sometimes a fourth pin is used for broadcast mode; also an extra resistor to ground matches the impedance).

    VGA uses 8 prop pins and 8 resistors.

    I think the resolution on VGA is better but this really depends on what you are trying to achieve. Some monitors and TVs have both analog composite TV and VGA inputs.

    Hope this helps.
  • jmgjmg Posts: 15,184
    edited 2011-12-11 21:38
    ayume wrote: »
    morning.. :)

    i want to show the position of a node in wireless sensor network, but i'm still confused to choose TV out or VGA that i want use.

    anybody can explain advantage and disadvantage between TV out and VGA please...

    You need to clarify what "show the position" means, and if this is a one off, or commercial application.
    Generally VGA will give better colour and pixel-counts than TV, but it also has larger connectors, stiffer cables, and the monitors are larger than LCD TVs, which can come down to 2.5".
  • AleAle Posts: 2,363
    edited 2011-12-12 04:00
    If he doesn't need color, then only 3 pins are needed for VGA... and the same "clunky" DB-15 connector :)
  • ericballericball Posts: 774
    edited 2011-12-12 06:08
    TV: only 3 pins required (can be as low as 1 for monochrome) and typically 1 cog, 102 colors, resolution limited: <240x480 NTSC <320x576 PAL, some pixels lost to overscan
    VGA: 8 pins unless external logic used (along with custom code), much higher resolutions possible (multiple cogs required), 64 colors (RGB)

    A limiting factor for both TV and VGA is HUB RAM. 32K doesn't allow for a very large bitmap. Tiles & text are more memory efficient but don't have the same flexibility.
  • RaymanRayman Posts: 14,849
    edited 2011-12-12 08:10
    VGA can display more information on a screen than TV. But, TV uses less pins and has a cheaper and simpler connection.
    TV also has a wider color palette...
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