Make a touchpad using pencil

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SemiconductorCat
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Make a touchpad using pencil

Post by SemiconductorCat » Sat Nov 03, 2012 12:08 am

Is that even possible. Yes it's possible today. And I have seen this on the internet and I
would like to share this with you boys and girls.

[media]http://www.youtube.com/watch?v=j3b68vZQ ... r_embedded[/media]


Source link: http://hackaday.com/2010/11/16/paper-touchpad/
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SevenZero
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Re: Make a touchpad using pencil

Post by SevenZero » Sat Nov 03, 2012 8:35 am

There is no big logic in there. It is just two voltage sources that detects the resistance and from there predict the pointer. When the carbon layer in not continuous, you will find practical problems as seen on the video.
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Peton10
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Re: Make a touchpad using pencil

Post by Peton10 » Mon Nov 19, 2012 12:07 am

This video is so much helpful and knowledgeable to me.
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