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I'm trying to trigger a human touch in a capacitive touchscreen without the 'human' part. I've noticed that the negative pole of a battery triggers it if you are currently holding it. Or if you use the edge - why only the edge? - of a wire touching the battery and your hand. I also attached a wire in a metal bottle and connected the battery to it's end (with the battery touching the screen) and it also worked - but sometimes it also didn't.

The question is: How can I trigger a touch on the screen without the human touch, using objects from the hardware store?

I have almost no physics knowledge for this, so you guys have to tell me exactly what to do (which material, where to buy and etc).

Thank you

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closed as not constructive by David Z Jul 9 '11 at 1:24

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

Hi José! I wanted to point out that asking about specific building instructions is off topic for this site. A better way to pose your question would be to ask about how capacitive touchscreens work and what sort of physical stimulus is necessary to "trigger" them - that invites answers that explain the underlying physics, which is what this site is about. I closed the question, but you can still edit it to focus on the physics rather than the construction; when you do, just flag the question for moderator attention and I'll be happy to reopen it. – David Z Jul 9 '11 at 1:27

A tightly rolled anti static bag (like the one memory chips or electronics come in) will work just fine. Easy to keep near the unit.

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