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Unread 16-02-2011, 14:33
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Re: DLink / D-Link resets going over bumps! Thoughts?

Quote:
Originally Posted by Al Skierkiewicz View Post
The first is that the DAP works on 12 volts when you bypass the convertor. This should not happen, it should blow up the DAP at 12 volts.
That's what I thought, too, and nearly had a heart attack when I was reviewing the schematic and saw the need for the converter. Eric VanWyk looked over the components inside the DAP, and he says all of the power components should be capable of handling 12v but the manufacturer of course will not sign off on that (for good reason). After plugging in the DAP into 12v, I was concerned I may have fried something, but when we plug the DAP into the wall using the supplied transformer/cable it works flawlessly (at least as flawlessly as we can tell). I think we're going to get a new DAP and have it stand-by just in case something turns up, but we cannot find anything wrong with the one we have.

Quote:
Originally Posted by Al Skierkiewicz View Post
The second is that you are measuring 12 volts into the convertor but only getting 7.3 volts out. I have to ask (even though I know the answer) is the convertor wired exactly according to the drawing. The +12 volt radio connector on the PD wired to the convertor input leads and the DAP connected to the output leads?
That's a fair question, but I wonder why you said, "only getting 7.3 volts out" - when I saw 7.3v when we first started playing with it I thought that was pretty suspect since I figured we should be seeing something around 5v since the converter is a 12v/5v converter. We absolutely have the converter's 12v input line connected correctly to the PDB's 12v output just to the left of the 24v line for the cRIO (and we're correctly measuring 12.3 volts from that line), and then the supposed 5v output (from which we're measuring 7.3 volts) from the converter is wired correctly to a connector that plugs into the DAP's power plug (EDIT: Yes, and we have a fully-charged battery).

It's just that when we try to power the DAP through the converter, nothing happens - no lights, no nothing, and while plugged in the multimeter says 2mA when I cut one of the wires and put the multimeter in series between the cut. But, when we unplug from the converter and use the supplied walwart (plugged into the wall, of course) everything works great on the DAP.

-Danny
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Last edited by Danny Diaz : 16-02-2011 at 14:35.