IOREF linked to GND
- Ersteller nonyx
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Thanks Roland!
DUE and all the components removed.
Here are the Arduino pins (on PCB1.3) which are grounded:
IOREF - AD4 - AD5 - AD6 - AD7 - AD13 - AD15
Attachment: https://forum.ardumower.de/data/media/kunena/attachments/4625/grounded.jpg/
DUE and all the components removed.
Here are the Arduino pins (on PCB1.3) which are grounded:
IOREF - AD4 - AD5 - AD6 - AD7 - AD13 - AD15
Attachment: https://forum.ardumower.de/data/media/kunena/attachments/4625/grounded.jpg/
Zuletzt bearbeitet von einem Moderator:
The strange thing is, that these lines are not connected to each other.
First thing I would check, have the pins a connection to ground? Check AD15 to GND for example and then Reserve.PinAD15 to GND you should measure 300Ohms if there is a shortcut.
Do you mean, that IOREF - AD4 - AD5 - AD6 - AD7 - AD13 - AD15 are connected to GND from the DUE?
Try Resv.PinAD15 for example: Follow the trace on the PCB and make sure you have no bridges. Measure the DIODES direction. Are they correct? Remove the DIODES for this pin to see if they make the problem. It is not bad to remove them, because you will maybe not need them in order the DUE has no ADC at this pin. Only if you connect something external then to this bin be sure not to go over 3.3V.
If AD4 - AD5 - AD6 - AD7 - AD13 - AD15 are connected to GND ynd you have no bridges, the lower DIODES could be wrong. And als minimum one upper Diodes must have the wrong direction.
But I hope you measure correctly.
If you measure betwenn Reserve.PinAD15 and Reserve.PinAD13 do you measure 600Ohm?
First thing I would check, have the pins a connection to ground? Check AD15 to GND for example and then Reserve.PinAD15 to GND you should measure 300Ohms if there is a shortcut.
Do you mean, that IOREF - AD4 - AD5 - AD6 - AD7 - AD13 - AD15 are connected to GND from the DUE?
Try Resv.PinAD15 for example: Follow the trace on the PCB and make sure you have no bridges. Measure the DIODES direction. Are they correct? Remove the DIODES for this pin to see if they make the problem. It is not bad to remove them, because you will maybe not need them in order the DUE has no ADC at this pin. Only if you connect something external then to this bin be sure not to go over 3.3V.
If AD4 - AD5 - AD6 - AD7 - AD13 - AD15 are connected to GND ynd you have no bridges, the lower DIODES could be wrong. And als minimum one upper Diodes must have the wrong direction.
But I hope you measure correctly.
If you measure betwenn Reserve.PinAD15 and Reserve.PinAD13 do you measure 600Ohm?
I visually checked the direction of every diodes, seems ok...
Attachment: https://forum.ardumower.de/data/media/kunena/attachments/4625/WIN_20190717_19_23_40_Pro.jpg/
Attachment: https://forum.ardumower.de/data/media/kunena/attachments/4625/WIN_20190717_19_23_40_Pro.jpg/
Zuletzt bearbeitet von einem Moderator:
Res.AD15 / Res.AD13 600Ohms
Checkout D66,D65, D69,D70. It could be, that the connection comes over GND or IOREF.
Solder out D66. If you measure 600 ohms again, solder out D65. If the problem exists, than the problem is maybe not the diode. Have you Diode Tester in you multimeter?
Checkout D66,D65, D69,D70. It could be, that the connection comes over GND or IOREF.
Solder out D66. If you measure 600 ohms again, solder out D65. If the problem exists, than the problem is maybe not the diode. Have you Diode Tester in you multimeter?
I think that’s the Proof, that diodes make the Problem. Maybe they are broken?
What is with the other pins where you soldered the diodes out.
Check every pin until no pin has a connection to GND or IOREF regarding the schematics.
That is the way I would go.
Another solution could be you call Markus and send the PCB back.
What is with the other pins where you soldered the diodes out.
Check every pin until no pin has a connection to GND or IOREF regarding the schematics.
That is the way I would go.
Another solution could be you call Markus and send the PCB back.
Manufacturing issue probably...
I’m disappointed, I mailed Markus because some parts are missing (the clamping elements, around 25€) and I’ve got no answer...And now the PCB (50€)...
I have a dozen of Ardumower to make (quite big garden
) but I don’t think the next ones will be geared with PCB1.3, and more than that. I will probably order the electronics part somewhere else...
But a big thank you to you Roland !
I’m disappointed, I mailed Markus because some parts are missing (the clamping elements, around 25€) and I’ve got no answer...And now the PCB (50€)...
I have a dozen of Ardumower to make (quite big garden
) but I don’t think the next ones will be geared with PCB1.3, and more than that. I will probably order the electronics part somewhere else...But a big thank you to you Roland
!