I've read through a number of questions (How can a capacitive touch screen be triggered without human contact?), (How to use a capacitive touch screen without a human hand), (What is the minimal capacitor (capitor type/size/capacity) needed to fool a capacitive touch screen?) around capacitive touch screens and triggering touches without contact to the human body (none of which actually have accepted answers as it turns out).
I have been able to reproduce a few devices that can occasionally trigger a touch on an iPad screen while insulated from the hand that's holding it.
However in my experiment, I want to be able to launch a projectile (like a nerf bullet) at an iPad screen and have it register as a touch. So far nothing I have tried has worked. I think there are 2 issues at play:
- No "ground" - the projectile can't be tethered so it can't be connected to ground in any reliable way
- Response time - the projectile hits and bounces off very quickly. I believe this is also part of the problem.
How can increase the self-capacitance of my projectile so it can effectively register a very rapid but consistent touch?
Can I add a capacitor or something else to increase the effectiveness of such a projectile? A battery?