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PX4 Hardware designs
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Pixracer GPS power port: 1.8V output #50

Closed LorenzMeier closed 7 years ago

LorenzMeier commented 8 years ago

@pkocmoud @nickarsov @kd0aij I'm measuring 1.8V output on the GPS power port with just the airspeed sensor attached. Can you confirm that? I'm measuring 0V with nothing attached.

nickarsov commented 8 years ago

Lorenz, which cable do you use as GPS cable has been totally swapped - both GPS connector and I2C connector. I already notified all users about. Can you send a screenshot of the wiring?

LorenzMeier commented 8 years ago

Its not the wiring, I measured the connector pins. I confirmed that my 2nd board provides 5V, so I got a bad board.

LorenzMeier commented 8 years ago

Where was the diode that was the wrong way around? Can you mark it in the layout?

nickarsov commented 8 years ago

There is just a resettable fuse between 5V and VDD_5V_PERIPH. Does it get hot?

2016-01-20 11:14 GMT+02:00 Lorenz Meier notifications@github.com:

Its not the wiring, I measured the connector pins. I confirmed that my 2nd board provides 5V, so I got a bad board.

— Reply to this email directly or view it on GitHub https://github.com/PX4/Hardware/issues/50#issuecomment-173139566.

nickarsov commented 8 years ago

Picture attached

2016-01-20 11:15 GMT+02:00 Lorenz Meier notifications@github.com:

Where was the diode that was the wrong way around? Can you mark it in the layout?

— Reply to this email directly or view it on GitHub https://github.com/PX4/Hardware/issues/50#issuecomment-173140282.

nickarsov commented 8 years ago

pixracer diodes fuses

LorenzMeier commented 8 years ago

Components on the working and non-working board are all oriented exactly the same.

nickarsov commented 8 years ago

Maybe the fuse FR101 gets overloaded by some reason... What is the voltage on its pads?

pkocmoud commented 8 years ago

This appears to be a defective board. Please close this issue unless other examples appear.