Force sensor apparatus and keyboard

A method of manufacturing a force sensing apparatus, the method comprising:

• providing a plurality of drive lines;
• providing a plurality of sensing lines;
• arranging the plurality of drive lines and the plurality of sensing lines to provide a plurality of intersections, each of the plurality of intersections defining a sensel, wherein each sensel is configured to exhibit a variable resistance response in dependence on a magnitude of a force applied to the sensel;
• grouping the plurality of sensels into a plurality of sensel groups, wherein each of the sensels in a sensel group is configured to exhibit a variable resistance response within a group resistance range;
• and wherein the group resistance range of a first sensel group is different to the group resistance range of a further sensel group;
• providing a plurality of control modules;
• and
• connecting each of the plurality of control modules to a corresponding sensel group, wherein each of the plurality of control modules is tuned to operate in the group resistance range of the corresponding sensel group, and wherein each of the plurality of control modules is configured to output a force signal indicative of a force applied to a sensel in the corresponding sensel group.