Now I kind off know that Capacitive Screens have like capacitors built into them that create an electrostatic field. Now whenever a thing that can carry charge or a conductor touches it distorts the field. Then the processor somehow calculates the location of touch

The thing is when I use a battery and try to use it as a stylus the -ve side does register touches but not the +ve side. Can anyone tell me why this happens? Edit : Got the Answer It was cause there was not good amount of surface in contact.

Is this the same reason that when I connect a wire to the cell and try using it to distort the field but it doesn't sense it?

And how do these rubber tipped stylus work? They are not conductors right?

I know there are many similar questions out there but I didn't find any of them helpful. Any articles or anything will be helpful.

  • 1
    \$\begingroup\$ Capacitive touch does not work like you explain, look up on Wikipedia how it works. Your question has a lot of wrong assumptions. Do research first, then ask. \$\endgroup\$ May 30 '18 at 6:18
  • \$\begingroup\$ @Bimpelrekkie I updated the Answer. \$\endgroup\$ May 30 '18 at 14:21
  • \$\begingroup\$ You can get conductive rubber. It doesn't have to be a good conductor to work. \$\endgroup\$
    – Simon B
    May 30 '18 at 15:47

it doesn't detect the positive side because it it too small, the negative end has a larger area.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.