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I am working on a 3D tracking interface project that I found online here.

enter image description here

However, instead of using my hand to track, I want to track an aluminum ball with a 2 cm radius, which is connected to ground. I am also using thin metal aluminum plates instead of foil.

I can't get the distance I need, which is about 35 cm. How do I increase the measuring distance of the plate to reach at least 35 cm?

This is the circuit:

Circuit

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  • \$\begingroup\$ Capsense is not meant to be very high resolution or high gain. If you had searched the Arduino library details you should have bumped into this: robot-develop.org/wp-content/uploads/2011/09/… This would be a much more suitable system to provide the increase in sensitivity you want \$\endgroup\$
    – Jack Creasey
    Commented Jun 27, 2018 at 17:00

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The frequency is too low for a conducting area 10x bigger with hand and more including arm.

BTW the design had a poor resolution of 2 bits or 4 levels to start with.

Try 1000 x higher frequency and increase plate gap by 1 cm.

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  • \$\begingroup\$ Thanks a lot for the answer, just to be sure I understood, the gap between the plate and the edge of the wood/carton? and the frequency, you mean the one in the set in the program? \$\endgroup\$
    – John Z
    Commented Jun 27, 2018 at 17:57
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    \$\begingroup\$ Plate edge gaps must be larger than ball. I don’t see a design schematic so it may not be possible using an Arduino only \$\endgroup\$
    – D.A.S.
    Commented Jun 27, 2018 at 18:13

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