Together with three others I designed an intuitive alarm clock. Looking at the design, you first see the relief, and that is also the first step of setting the time; the amount of sleep is represented by the dents of the two sliders. Then, the indent on the side of the middle block becomes visible, which suggests that it can go up, like the sound of the alarm can go up. When the alarm goes, this lever should be pushed down. When in the initial state, the alarm clock resets. This process can be seen in the three pictures below from.
I learned about different kinds of feedback and feedforwards, intuitive interaction and mapping. This perspective opened a whole new world for me and triggered my interest in intuitive interaction. Furthermore, I learned different prototyping methods, such as interaction relabelling, movement based interaction.