Human-computer interface system

A system comprising:

• a set of touch layers spanning a first area and comprising:
• a first subset of touch layers comprising an array of drive and sense electrode pairs;
• and
• a second subset of touch layers arranged below the first subset of touch layers and comprising:
• an intermediate layer comprising a first spiral trace coiled in a first direction across the intermediate layer;
• and
• a bottom layer arranged below the intermediate layer and comprising:
• a second spiral trace coupled to the first spiral trace and coiled in a second direction, opposite the first direction, across the bottom layer;
• and
• a set of electrodes arranged proximal a set of support locations at the bottom layer;
• a set of inductor layers spanning a second area, less than the first area, below the set of touch layers and comprising:
• a first inductor layer comprising a third spiral trace coupled to the second spiral trace and coiled in the first direction across the first inductor layer;
• and
• a second inductor layer comprising a fourth spiral trace:
• coupled to the third spiral trace;
• coiled in the second direction, opposite the first direction, across the second inductor layer;
• and
• cooperating with the third spiral trace, second spiral trace, and first spiral trace to form an inductor;
• and
• a first magnetic element defining a first polarity facing the inductor and configured to magnetically couple the inductor to oscillate the set of touch layers.