it is possible to build a device that can create an electrical current that can be felt on the skin from a mild pressure by the hand?, dose piezoelectric materials can create enough electricity from friction like rubing them with the hand?.
don't ask for what it is, i just want to know
No, not really. You have to smack piezo pretty hard to get much of a current out of it. That wouldn't fit your application :)
You could probably do something with induction -- like the flashlights that you shake to light them up.
do you know what is the application of what i want to do? i can tell you on private if you want cause i can't talk about it her cause of adult restrictions..
the shaking mechanism of a magnet in a copper coil wouldn't fit to what i want.
what about triboelectric effect? i readed an article about producing electricity with friction of human skin on some polymer http://pubs.acs.org/doi/abs/10.1021/nn403838y
it could produce enough current to be felt on the body?
i don't know if it is the same case but i saw this video about triboelectric power and charging of smartphones, in 2:15 there is a demonstration with someone powering several led diods by blowing into this generator
it looks like it can produce significant current from mild rubbing so it can work to some level right? it is enough to be felt on the skin?.The "Mentor" label under my username means that I see all that happens on the PF, so yes, I know what your desired application is.
No, triboelectricity and static electricity will probably not do what you want. What do you have against AA batteries? Or even CR2032 batteries?