Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: Admin on January 13, 2011, 10:07:07 AM
-
On page 3 of this pdf:
http://www.intersil.com/data/an/an1312.pdf (http://www.intersil.com/data/an/an1312.pdf)
What are those little metal knobs sticking out? The pdf only says "LEFT IS AN ENGINEERING EVALUATION BOARD USING A SOCKET".
Also, does anyone know where I can buy connectors to attach to these 'sockets'?
-
It looks either like a coaxial cable connector or a small BNC connector. I guess you don't have any information on the size?
-
The socket I believe they are talking about is the black thing in the middle. The chip is a 356 BGA (Ball Grid Array). Compare the center black area to this image of a BGA socket:
(http://t2.gstatic.com/images?q=tbn:ANd9GcQ14Ym-soOa7-dO5Ink2YmXNcQapw7vRs-a5FImQLDVoPLk8NnSJQ)
As for the metal knobs sticking up, I would assume they are BNC as mstacho pointed out. Probably for RGB+Sync.
-
Yeah, pretty sure it's a BNC connector. They're all over the place where I work.
There are mini-BNC connectors though, and it's tough to tell the size from that picture. So they could be mini or full-size...
http://search.digikey.com/scripts/DkSearch/dksus.dll (http://search.digikey.com/scripts/DkSearch/dksus.dll)
edit: typo
-
There are mini-BNC connectors though, and it's tough to tell the size from that picture. So they could be mini of full-size...
http://search.digikey.com/scripts/DkSearch/dksus.dll (http://search.digikey.com/scripts/DkSearch/dksus.dll)
hmmmm is that link what you meant to paste here?
fyi: I emailed them, but still waiting to hear back . . .
-
Sorry, I failed at providing a link. Anyway, it was supposed to be a link to the search results for "BNC" on Digikey.
I like BNC connectors because I have to hook and unhook RF cables all the time and it these connectors are a lot easier and quicker than the regular coaxial ones.
-
Hi,
Is it the 128 "dots" (in 8 groups of 16) you mean?
Sure they look somewhat like BNC's, but must be around half the size of regular BNC's (when compared with the chip), but on the other hand, the rightmost pic seems to have very small D-Sub sonnectors, so perhaps the chip and the PCB is just very large.
Given it has 32 inputs and 32 outputs, half the connectors (whatever their type) must be "blind" or ground terminals (and it could seem so in the pic), but why would they use any non-coax socket(?).
-
Nevermind, the company just got back to me:
I just confirmed that we do not have any boards available for CD22M3494, even in the factory. This is an old part, and it is not supported as actively as the newer parts. I also made sure to confirm that it was our only such offering for bidirectional use, and it is.
But thats ok, I'll just get a few sparkfun mux boards and control them with an Axon:
http://www.sparkfun.com/products/9056 (http://www.sparkfun.com/products/9056)
-
Your MUX setup is similar to something I intend to do with a whole lot of touch sensors. Most likely, though, I'm going to multiplex the crap out of it, so that a single MUX chip will be used to attach to 8 other MUX chips. I figure that'd need only 6 address pins + 1 ADC. Reading might be a bit slow, though... :-P
MIKE