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Re: [Paparazzi-devel] UART3 Lisa/M 2.0 Verification

From: Chris Wozny
Subject: Re: [Paparazzi-devel] UART3 Lisa/M 2.0 Verification
Date: Wed, 11 Apr 2012 22:07:06 -0700

Thanks Stephen,

I ended up removing the resistor on JP6, but my soldering iron ate it up pretty quickly. I shorted JP7 with some solder and everything seems to be hunky dory since I'm getting 3.3V on UART3 now. I don't have the software to open up the schematics, but I figured the resistor was more for shorting than for dropping the voltage level.

Is my board gonna burn up eventually since I merely closed JP7 with solder or is this fine?


On Apr 11, 2012, at 9:13 PM, Stephen Dwyer <address@hidden> wrote:


I believe that is correct. Just make sure JP6 and JP7 are not closed at the same time, and you should be good. Also, wouldn't hurt to check the voltage on the UART3 connector pin 2 with a dmm prior to connecting the gps :).

If you are still nervous, check the schematics.

-Stephen Dwyer

On Tue, Apr 10, 2012 at 6:36 PM, Chris Wozny <address@hidden> wrote:

Our GPS uses 3.3V input and I know that I need to change the jumper
configuration to use 3.3 instead of VIN. I just wanted to verify that
to do that I need to open JP6 and close JP7 with the same resistor.
Figured I'd check so that I don't go about connecting my VIN to 3.3V
and destroying my board :)

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