Though much research is still necessary before a personal robot with a
nthropomorphic features becomes a full reality, accessible and appeali
ng to the general user, present technology is able to offer many solut
ions to the different problems arising in the development of sensors a
nd actuators, which are a key factor in the achievement of the final g
oal. However. the challenge of obtaining a humanoid robot combining ad
equate technical performance with a 'behavior' appealing for a real 'c
ompanion' to the human user requires a truly interdisciplinary effort
involving not only technical disciplines, but also the contribution of
human sciences. This paper presents the motivations for the developme
nt of sensors and actuators for humanoid robots, with particular empha
sis on service robotics and on the concept of a personal robot. A brie
f survey of existing technologies is reported and a few examples of pr
esent implementations are described. We also present the main features
of a real personal robot whose technical and aesthetical characterist
ics are purposively designed to match those desirable for a 'humanoid'
robot.