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Topic: Capacitive Sensor No Output (Read 2524 times) previous topic - next topic

liudr

Are you using Arduino UNO or Arduino MEGA or some other arduinos?

xaviergoh

Pretty sure the wiring are fine. Maybe I will post a photo of it when I get back.

I am using UNO.

liudr


Maybe I will post a photo of it when I get back.


Not maybe, please post photos.

xaviergoh

Yep, of course. I will post once I get back home after school.

xaviergoh

#19
Feb 05, 2013, 03:01 pm Last Edit: Feb 05, 2013, 03:03 pm by xaviergoh Reason: 1
My connections :

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Uploaded with ImageShack.us

HazardsMind

Are you putting strip-twisted wires in those pins? That red wire looks a little iffy to me, make sure all the wires have a solid connection.
My GitHub:
https://github.com/AndrewMascolo?tab=repositories

xaviergoh

Yep, twisted wires, cant find a place to purchase those pin wire. the connections are good, previously I had used a set of different wires. Didnt get any response either. If connection is fine, what are the possible causes?

HazardsMind

One if not both boards may be defective. If you have a soldering iron handy, you can coat the wires and that should give you a better connection.
My GitHub:
https://github.com/AndrewMascolo?tab=repositories

xaviergoh

I juz tested the connections with multimeter. They are fine. Is there any way to proof/verify the boards are defective? I am not sure if I could get a replacement/refund for it :(

HazardsMind

No way I know of. I could be a software bug, or the boards. Try to get in touch with seller and see if they had any simular issues in the past, and if there are any solutions.
My GitHub:
https://github.com/AndrewMascolo?tab=repositories

xaviergoh

#25
Feb 06, 2013, 03:44 pm Last Edit: Feb 06, 2013, 03:46 pm by xaviergoh Reason: 1
I have changed to pin cable today :

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Uploaded with ImageShack.us

After my enquiry, the seller updated their library on their site , but after trying the new library, there is no response at the output either.
My guess is that it could highly be the MPR121 breakout board that is faulty, but shall wait for seller to reply again.

liudr

If you have a magnifier, look carefully at the soldering job under the magnifier. There might be some problems you can identify.

HazardsMind

I wonder if you need to cross the SDA and SCL lines? Try swapping the orange and yellow wires.
My GitHub:
https://github.com/AndrewMascolo?tab=repositories

liudr


I wonder if you need to cross the SDA and SCL lines? Try swapping the orange and yellow wires.


I think his connection is right:


HazardsMind

They most likey are, but I just wanted to rule it out. I've never had one myself, so I don't know if there is any special ways of debugging it, other than the normal methods.
My GitHub:
https://github.com/AndrewMascolo?tab=repositories

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