MPR121 with Bare conductive paint?

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zoniguana
 
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MPR121 with Bare conductive paint?

Post by zoniguana »

Looking to use these two together, to make non-flat surface something detectable with near-contact (not actually being able to touch is important).

I can see painting the inside of the sphere with the Bare paint, and I suppose gluing wire to it with conductive glue would be the next part, but, a blob of the paint might also do it.

But, regardless, will that be conductive enough to allow the MPR121 to pick up a ~2-sq-in paint patch through ~1/16" plastic?

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adafruit_support_mike
 
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Re: MPR121 with Bare conductive paint?

Post by adafruit_support_mike »

You'd have to try it and see.

Capacitive sensors don't obey the simplifying assumptions we use to make electronics easier, so everything about the electrical properties and geometry of the system matters.

zoniguana
 
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Re: MPR121 with Bare conductive paint?

Post by zoniguana »

I can definitively say it will register through the plastic - at least for 1 sensor. Now to test 12!

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adafruit_support_mike
 
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Re: MPR121 with Bare conductive paint?

Post by adafruit_support_mike »

Thanks for posting the follow-up!

zoniguana
 
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Re: MPR121 with Bare conductive paint?

Post by zoniguana »

Further testing is delayed - I managed to burn part of my Teensy (somehow that just sounds so wrong), and am having to rebuild the brains of the operation before I can reattach the nerve endings.

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