Instructables

Fabric Touchpad

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How to use a piezoresistive material to detect both pressure and location! Sandwitched between two conductive layers (with spacers in between) the piezoresistive material has two important properties. (1) It's resistance through (z) the material decreases when pressured and (2) it's resistance across distance (x,y) is not affected by pressure and increases with distance.
 
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Step 1: Other Options

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Before jumping in to explaining this specific solution to location and pressure sensing, i just wanted to list some of the other options...

Step 2: Materials and Tools

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Materials
- conductive fabric
- piezoristive material (velostat, linqstat or eeontex)
- thin foam

Tools
- scissors
- fusible interfacing
- analog/digital converter (arduino, teensy....)

Step 3: Inspect Your Materials

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Step 4: Prepare Your Layers

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Step 5: Select Your Pull-Up Resistors

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Step 6: Circuitry

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Step 7: Visualization

Step 8: Sew?

agomes61 year ago
By any chance will you share the code with the 4 analogs mapped / visualization sketch? :)