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'[EE]: How to build a Hi-def Component Switcher?'
2002\02\23@213845 by Rick Mann

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My roommate needs a 10-input high-def-capable component video switcher. How
can I make one of these? I know how to use a PIC to decode IR signals, but I
don't know how to actually switch the video signals.

It would be nice to have more than one output, but that's not completely
necessary.

I know that IC switchers can have bandwidth limitations, so it's not
unreasonable to use relays to do the switching, but I'm not sure a relay
wouldn't radiate lots of RF.

Any ideas?

TIA,

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Rick

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2002\02\23@222552 by Sean H. Breheny

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Hi Rick,

Are you talking about ten inputs one output or more than one output? Maxim
makes some ICs specifically intended to be digitally-controlled video
switches, including crosspoint switches (where you have, say, 5 inputs and
5 outputs and you need to be able to arbitrarily direct any output to any
input).

See: http://www.maxim-ic.com
and choose "Analog Switches and Multiplexers" from the list on the left.

Relays aren't a bad idea and could work well, but in order to preserve very
high quality video at UHF frequencies, you might need special relays (or at
least small ones) and there probably is a single chip solution from Maxim.
I don't think RF leakage would be the main problem, since you could easily
shield the box.

Sean

At 06:37 PM 2/23/02 -0800, you wrote:
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2002\02\24@081419 by Alexandre Domingos F. Souza

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>My roommate needs a 10-input high-def-capable component video switcher.
>How can I make one of these? I know how to use a PIC to decode IR signals, but
>I don't know how to actually switch the video signals.

       Rick, I THINK a 4066 would do the job (are we talking about video component or RF?). But if you are planning RF switching, nothing better than Relays. :o)


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Alexandre Souza
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2002\02\25@073553 by Alan B. Pearce

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>My roommate needs a 10-input high-def-capable component video switcher. How
>can I make one of these? I know how to use a PIC to decode IR signals, but
I
>don't know how to actually switch the video signals.

>It would be nice to have more than one output, but that's not completely
>necessary.

>I know that IC switchers can have bandwidth limitations, so it's not
>unreasonable to use relays to do the switching, but I'm not sure a relay
>wouldn't radiate lots of RF.

Maxim make video distribution amplifiers and cross point switches that would
work for this.

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