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Large touch sensors
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Large touch sensors

by jspoerri on Sun Apr 10, 2016 10:27 am

Hi,
How large of an electrode can one connect to with with your touch sensor? I'd like to sense when someone touches a metal object with about 10 sqft of surface area...similar in size to a person's surface area.
Thanks!

jspoerri
 
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Re: Large touch sensors

by adafruit_support_bill on Sun Apr 10, 2016 11:41 am

If the electrode surface area is too large, the sensor my be unstable and give you false readings. Another approach might be to divide the sense area into different 'zones' each with a different sensor, then 'OR' together the outputs of all the sensors.

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Re: Large touch sensors

by jspoerri on Sun Apr 10, 2016 3:26 pm

Can the capacitor on the board be tweaked to allow for as large an electrode as possible? How large is too large?
Thanks!

jspoerri
 
Posts: 2
Joined: Sun Apr 10, 2016 10:19 am

Re: Large touch sensors

by adafruit_support_bill on Sun Apr 10, 2016 3:49 pm

The standalone touch sensors can be tweaked by changing the capacitor. Some of the i2c based sensors support sensitivity changes in software. But 10 square feet is pretty large. From my experiments with an standalone sensor, it was hyper-sensitive at about 64 square inches. I think you are treading new ground here. You'll have to experiment to see what is possible.

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Please be positive and constructive with your questions and comments.