DIY AV selector

kidw/32+systems · Post by **kidw/32+systems** » Wed Jun 13, 2007 10:48 pm

If I take a bunch of AV ports and wire them together it should work right? You only use one set at a time so I think so, but I don't know about it back feeding.
Should I make an amplifier circuit or would it be fine with out?

schmellyfart · Post by **schmellyfart** » Thu Jun 14, 2007 2:13 am

I dont know. But, I do know that Ben made a how-to for engadget on making a DIY AV selector

tom61 · Post by **tom61** » Thu Jun 14, 2007 1:33 pm

Just wiring more than two together will cause interference(even just two can, but the interference usually isn't that much), as the cables and systems have different resistance and capacitance. An amplifier would end up amplifying the interference as well, so a switcher would be your best bet.

Felino · Post by **Felino** » Fri Jun 15, 2007 7:03 am

Thats sort of like wiring a bunch of USb data lines together, it just ain't going to work buddy. Ben did one ages ago, but if you aren't u[ to that, a factory made one is your best bet. They sell here for ~$30.

What sort of video are you referring to? Composite, component?

kidw/32+systems · Post by **kidw/32+systems** » Fri Jun 15, 2007 7:46 am

Composite, I can't go factory made cause they don't have enough connectors and are to big. I was going to make one with at least 20 inputs so I have no clue on how I am going to make it switchable.

EDIT: I think I got it, dip switches. On the connectors the center is the line in, and the outside is a ground right?

bgnome · Post by **bgnome** » Fri Jun 15, 2007 12:27 pm

dip switches are not very practical as they were not meant to be switched that often.. besides, they are teeny tiny!

you really should consider using ICs. read up on bens project:
http://www.engadget.com/2007/03/13/how- ... -switcher/

Kurt_ · Post by **Kurt_** » Fri Jun 15, 2007 1:16 pm

I'd go with a net with a whole bunch of switches

Like a triangle, where every switch leads to 2 switches or more until you get to the inputs! That'd be so confusing only you could use it!

kidw/32+systems · Post by **kidw/32+systems** » Fri Jun 15, 2007 3:17 pm

bgnome wrote:...you really should consider using ICs. read up on bens project:
http://www.engadget.com/2007/03/13/how- ... -switcher/

Thanks I couldn't find the article.

Felino · Post by **Felino** » Sat Jun 16, 2007 5:57 am

Why are you switching 20 inputs?

vskid · Post by **vskid** » Sat Jun 16, 2007 10:26 am

Felino wrote:Why are you switching 20 inputs?

Well when you have over 100 systems, I'm sure it gets annoying to switch them.