In one example in accordance with the present disclosure, an electronic input device is described. The electronic input device includes a scribing shaft disposed within a housing, the scribing shaft to translate along a longitudinal axis as a result of contact with a substrate. The electronic input device also includes an input sensor. The input sensor includes a plate secured within the housing. The plate elastically deforms responsive to the translation of the scribing shaft. A full-bridge strain gauge of the input sensor is disposed on a surface of the plate. The full-bridge strain gauge detects a deformation of the plate and outputs a corresponding signal, which corresponding signal varies dependent upon the amount of deformation of the plate. The input sensor also includes a failure protection device to limit the deformation of the plate to within a predetermined amount.