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1  Using Arduino / Programming Questions / Re: Random() on: November 17, 2012, 07:38:46 pm
keep track of the most recent random number. Then before allowing a new random number, compare it to the variable. If it's different, do what you need to do with it. If it's the same, keep generating new ones until it's different.

Lather, rinse, repeat.
2  Using Arduino / General Electronics / Re: Looking for a connector on: November 10, 2012, 06:33:49 am
It looks like the minimum is 5 per row, judging from this:

http://www.samtec.com/documents/webfiles/pdf/mecf.pdf

3  Using Arduino / General Electronics / Re: Looking for a connector on: November 09, 2012, 08:23:10 pm
These any good?

http://www.samtec.com/microedgecard/HS_Edge_Card.aspx

There's a mini one about halfway down that looks like it'll fit your application quite nicely.

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