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Ttl Serial Hook Up Question

Quick question. I'm setting up the serial to computer The usb ttl converter has a jumper for 5 and 3.3 v just want to make sure that 3.3v is the choice so no blue smoke or other disasters ! Or does it matter since i, not using vcc?

Edit_ works great, connected to the computer via USB...yay


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The VCC doesn't matter since you aren't using that pin (Don't connect the VCC. Really. Don't do it!).

Hey there so both my EZBs are connected via the TTL converter. I know the chimes are gone with this set up, but I still get a flashy blue light when connected to either EZB. Is this the way they are going to be? It would be nice to have a solid blue light to signify that i am connected.
You da best:)

Edit: I read it wrong..thought said its on its way...boo hoo. I'll live with it!