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CAPSENSE™ & MagSense Forum Discussions

PaAr_3783191
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Toggles, push buttons, sliders, rotary & rocker switches and their capacitive touch equivalents.

But how can you start designing capacitive touch switches? Get our free technical guide: From switches to touch controls  here.

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We'll draw and simulate three button designs: with 1, 2 and 4 mm clearance respectively. The PCB footprint stays the same in each case, but the

area the buttons take up changes.

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In this case, the design guideline has a severe effect on the performance.

As far as the capacitance is concerned, all the designs could work, even the one with the 4 mm clearance that is outside the recommendations.

But, choosing the design with 1 mm clearance would limit us to a 1 mm cover glass, that would make the design too fragile and the design with the 4 mm clearance creates empty spaces, where touch will not be detected.

So, we select the design with 2 mm clearance as the basis for further optimization. You can read and get our free technical guide: From switches to touch controls  here.

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