Changing the capacitance of an object to trigger a capacitive touchscreen


by jolealdoneto
Tags: capacitance, touchscreen
jolealdoneto
jolealdoneto is offline
#1
Jul8-11, 08:13 AM
P: 1
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
Phys.Org News Partner Engineering news on Phys.org
Fiber-optic microscope will help physicians detect cancer, diseases at early stages
Wind tunnel tests support improved aerodynamic design of B61-12 bomb
Smart sensor technology to combat indoor air pollution
Jiggy-Ninja
Jiggy-Ninja is offline
#2
Jul8-11, 09:44 PM
P: 310
Quote Quote by jolealdoneto View Post
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
Have you tried touching it with one lead of a capacitor?


Register to reply

Related Discussions
Do I build up static charge from using a capacitive touchscreen? Electrical Engineering 0
Projected Capacitance Touchscreen, confused by how the capacitance is formed. Electrical Engineering 4
Capacitance after changing plate distances Introductory Physics Homework 4
What will trigger a capacitance touch sensor? Electrical Engineering 1