Modulares Interface B.A.

Haptic iPad

Multi-touch devices like the iPad have become more and more popular over the last couple of years. Nowadays they are not only used for browsing and sending e-mails, but also as a medium for new fields of applications. One particular thing of multi-touch devices is in need of improvement: It is the lack of haptic feedback, which makes it difficult to set parameters precisely.

Regarding to this problem the project has been developed to provide a variety of physical controllers. These controllers expand the usage of a touch device with a haptic feedback while adjusting parameters. By using magnets, the different controllers can easily be arranged onto the iPad. A modular interface appears, which uses a given device just like the iPad.

The System Contains Three Different Parts

- The physical controllers (button, slider and knob), made out of conductive aluminium to pass on the electrical discharge of the human skin.

- A frame, made out of aluminium and plastic, in which the iPad is inserted. The edge of the frame has embedded magnets, making it possible to position the controller precisely and easily.

- The software, running as an app on the iPad. It organizes the control elements and sends the parameters to the corresponding software, which is controlled by the modular interface.

Technical Details and Features

- Because the controllers are made from aluminum and make direct contact with the multi-touch device, it suffices for the user to touch the controller to trigger a touch event on the device, as the aluminum conducts the human touch. no extra electronics are needed.
- To prevent the aluminum controllers from scratching the glass surface of the device a conductive foam is used.
- the frame is designed so that the multi-touch devices can be safely removed without corrupting the controller configuration.
- The software running on the device is an iOS app programmed in Cinder/C++.
- After detecting a new controller the application sends the controller’s current properties, whenever the controller is touched or manipulated by a user.
- Messages are send via the well-known Open Sound Control ( OSC ) protocol which is frequently used in music ( and artistic ) applications.

Lecturer/s: Prof. Dennis Paul Prof. Peter von Maydell

More information at the University Bremen &