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How feasible to add composite video or s-video to late '90s tv?

Discussion in 'Misc Electronics' started by Don Taylor, Jan 2, 2004.

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  1. Don Taylor

    Don Taylor Guest

    Bought a 27" RCA television in the mid to late '90s, but it was a
    cheaper model without a composite or s-video input.

    Now as the number of video gadgets piles up I'm wondering whether
    it would be feasible to add a video input to this set.

    Disclaimers: I've got a reasonable amount of electronics experience,
    understand high voltage (especially after getting belted with a bolt
    from an operating big old console set I was working on 25 years ago)
    and am just wondering whether there is information out there that
    would make this a feasible project or not.

    thanks
    (email address is valid, been "dont" on the net since before there was spam)
     
  2. You can buy a RF modulator at Rat Shack for $30, and it has both the
    composite and s-video input jacks. You may also need to buy cables,
    so it may cost a bit more.

    I've been dinking around with the RF units from old VCRs. All you
    have to do is put one inline with the antenna input of the TV, and put
    your video and 5VDC supply voltage on it. Most of them have simple
    pinouts (5 pins), and take 5VDC. Older ones may take a higher
    voltage. Of the three or four that I've connected to the TV, they all
    have decent picture quality and are free, if you can find an old VCR.
    The best ones will pass thru the antenna when off, and disconnect the
    antenna and enable the RF on Ch. 3 or 4 when on.

    Hey, there's nothing wrong with connecting a video jack to the TV
    internally, but why bother when you can do it with an RF modulator.

    --
    @@[email protected]@[email protected]@@[email protected]@[email protected]@[email protected]@@[email protected]@[email protected]@[email protected]@,@@[email protected]@[email protected],@@[email protected]@[email protected]@[email protected]@
    ###Got a Question about ELECTRONICS? Check HERE First:###
    http://users.pandora.be/educypedia/electronics/databank.htm
    My email address is whitelisted. *All* email sent to it
    goes directly to the trash unless you add NOSPAM in the
    Subject: line with other stuff. alondra101 <at> hotmail.com
    Don't be ripped off by the big book dealers. Go to the URL
    that will give you a choice and save you money(up to half).
    http://www.everybookstore.com You'll be glad you did!
    Just when you thought you had all this figured out, the gov't
    changed it: http://physics.nist.gov/cuu/Units/binary.html
    @@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@@[email protected]@[email protected]@@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@@
     
  3. Don Taylor

    Don Taylor Guest

    Someone who I thought was pretty competent in the electronics
    business told me that the old "hot chassis" risk went away when
    cost cutting in television power supplies for tubes led to hot
    chassis then changed over to cost cutting in televisions led to
    everything being done with a couple of ic's that only used 5 volts.

    True? False?

    Thanks
     
  4. All the PSes I've seen recently are SMPSes, and they are well
    insulated from the incoming AC line. I see grooves or slots cut into
    the PC board in such places as between the hot side and the chassis
    side of the optoisolator. They take isolation seriously, with
    hipotted transformers, etc.


    --
    @@[email protected]@[email protected]@@[email protected]@[email protected]@[email protected]@@[email protected]@[email protected]@[email protected]@,@@[email protected]@[email protected],@@[email protected]@[email protected]@[email protected]@
    ###Got a Question about ELECTRONICS? Check HERE First:###
    http://users.pandora.be/educypedia/electronics/databank.htm
    My email address is whitelisted. *All* email sent to it
    goes directly to the trash unless you add NOSPAM in the
    Subject: line with other stuff. alondra101 <at> hotmail.com
    Don't be ripped off by the big book dealers. Go to the URL
    that will give you a choice and save you money(up to half).
    http://www.everybookstore.com You'll be glad you did!
    Just when you thought you had all this figured out, the gov't
    changed it: http://physics.nist.gov/cuu/Units/binary.html
    @@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@@[email protected]@[email protected]@@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@@
     
  5. I agree; point taken. As far as I know, there are regulations
    governing this, so it's wise to check first before risking the chance
    of shock.

    --
    @@[email protected]@[email protected]@@[email protected]@[email protected]@[email protected]@@[email protected]@[email protected]@[email protected]@,@@[email protected]@[email protected],@@[email protected]@[email protected]@[email protected]@
    ###Got a Question about ELECTRONICS? Check HERE First:###
    http://users.pandora.be/educypedia/electronics/databank.htm
    My email address is whitelisted. *All* email sent to it
    goes directly to the trash unless you add NOSPAM in the
    Subject: line with other stuff. alondra101 <at> hotmail.com
    Don't be ripped off by the big book dealers. Go to the URL
    that will give you a choice and save you money(up to half).
    http://www.everybookstore.com You'll be glad you did!
    Just when you thought you had all this figured out, the gov't
    changed it: http://physics.nist.gov/cuu/Units/binary.html
    @@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@@[email protected]@[email protected]@@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@@
     
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