End users with restrictions in their upper limbs do often require ad hoc solutions to interact with diverse electronic devices or home appliances. CEAPAT-IMSERSO has worked since 1989 on the design, adaptation, creation and evaluation of multiple purpose buttons and switches to be used by children, adults or elderly people with different interaction abilities (hand, elbow, forehead, foot, arm, cheek, chin, tongue, ...) . This topic aims to share the evolution on these design according to the acquired users´s feedback and experience.
Next design shows a easy to use square button to be plugged through a 3.5 mm. jack connector. (Size: 80/40/35mm.)