The Simplest High-precision DIY Touchscreen Stylus




This is as simple as it can get with a stylus for capacitive touchscreens.

1) Get a wood pencil,

2) Gently chew the rear end of the pencil (if you haven't done that yet, anyway) until the lead is exposed and rounded (see close-up picture).

3) Use it as a very precise stylus (the screenshot is from Autodesk Sketchbook for Android on a Samsung Galaxy S5 Active). My screen doesn't get marked, and if so happens it can easily be wiped off.

I ignore the science behind, but I suspect that the fact that my pencil doesn't have a layer paint make this concept work. I have also tried to use the sharp end of the pencil, and although it works the "contact" is inconsistent.

Note: You can also use this stylus on regular paper!!!

Step 1: Update

I am now wildly hypothesizing that the reaction of the screen to the pencil depends on the humidity of the wood. Why? because when it didn't work, I simply licked the tip of the pencil making sure the wood gets wet, and voil√°!



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    2 Discussions


    9 months ago on Step 1

    Nice! This is something I never even thought about. Your hypothesis about the humidity of the pencil rings true. Most touch screens nowadays are capacitive. And as such, respond to stimulus from objects that are conductive. Processed wood(pencil) is not very conductive without a large amount of voltage, but when you get it wet(saliva) it uses it's conductence to function properly. But, I'm shooting from the hip here and I could be wildly off target. Cheers!


    2 years ago

    Thanks for sharing :)