The calder toolkit: wired and wireless components for rapidly prototyping interactive devices

ABSTRACT

Toolkits and other tools have dramatically reduced the time and technical expertise needed to design and implement graphical user interfaces (GUIs) allowing high-quality, iterative, user-centered design to become a common practice. Unfortunately the generation of functioning prototypes for physical interactive devices as not had similar support -- it still requires substantial time and effort by individuals with highly specialized skills and tools. This creates a divide between a designers' ability to explore form and interactivity of product designs and the ability to iterate on the basis of high fidelity interactive experiences with a functioning prototype. To help overcome this difficulty we have developed the Calder hardware toolkit. Calder is a development environment for rapidly exploring and prototyping functional physical interactive devices. Calder provides a set of reusable small input and output components, and integration into existing interface prototyping environments. These components communicate with a computer using wired and wireless connections. Calder is a tool targeted toward product and interaction designers to aid them in their early design process. In this paper we describe the process of gaining an understanding of the needs and workflow habits of our target users to generate a collection of requirements for such a toolkit. We describe technical challenges imposed by these needs, and the specifics of design and implementation of the toolkit to meet these challenges.

REFERENCES

• 1: Daniel Avrahami , Scott E. Hudson, Forming interactivity: a tool for rapid prototyping of physical interactive products, Proceedings of the conference on Designing interactive systems: processes, practices, methods, and techniques, June 25-28, 2002, London, England [doi>10.1145/778712.778735]
• 2: Brian P. Bailey , Joseph A. Konstan, Are informal tools better?: comparing DEMAIS, pencil and paper, and authorware for early multimedia design, Proceedings of the SIGCHI conference on Human factors in computing systems, April 05-10, 2003, Ft. Lauderdale, Florida, USA [doi>10.1145/642611.642666]
• 3: Rafael Ballagas , Meredith Ringel , Maureen Stone , Jan Borchers, iStuff: a physical user interface toolkit for ubiquitous computing environments, Proceedings of the SIGCHI conference on Human factors in computing systems, April 05-10, 2003, Ft. Lauderdale, Florida, USA [doi>10.1145/642611.642705]
• 4: W. Buxton , M. R. Lamb , D. Sherman , K. C. Smith, Towards a comprehensive user interface management system, Proceedings of the 10th annual conference on Computer graphics and interactive techniques, p.35-42, July 25-29, 1983, Detroit, Michigan, United States
• 5: Cagan, J., and Vogel, C., Creating Breakthrough Products: Innovation from Product Planning to Program Approval, Financial Times - Prentice Hall Publishing. 2001.
• 6: Dietz, P.H.; Leigh, D.L.; Yerazunis, W.S., "Wireless Liquid Level Sensing for Restaurant Applications", IEEE Sensors, pp. 715--20, June 2002.
• 7: Saul Greenberg , Chester Fitchett, Phidgets: easy development of physical interfaces through physical widgets, Proceedings of the 14th annual ACM symposium on User interface software and technology, November 11-14, 2001, Orlando, Florida [doi>10.1145/502348.502388]
• 8: Saul Greenberg , Michael Boyle, Customizable physical interfaces for interacting with conventional applications, Proceedings of the 15th annual ACM symposium on User interface software and technology, October 27-30, 2002, Paris, France [doi>10.1145/571985.571991]
• 9: Jonathan B. Knudsen , Mike Loukides, Unofficial Guide to LEGO MINDSTORMS Robots, O'Reilly & Associates, Inc., Sebastopol, CA, 1999
• 10: James A. Landay , Brad A. Myers, Interactive sketching for the early stages of user interface design, Proceedings of the SIGCHI conference on Human factors in computing systems, p.43-50, May 07-11, 1995, Denver, Colorado, United States [doi>10.1145/223904.223910]
• 11: Linx Technologies, "Modulation Techniques for low-cost RF Data Links." Application Notes: AN-00130, 1997.
• 12: James Lin , Mark W. Newman , Jason I. Hong , James A. Landay, DENIM: finding a tighter fit between tools and practice for Web site design, Proceedings of the SIGCHI conference on Human factors in computing systems, p.510-517, April 01-06, 2000, The Hague, The Netherlands [doi>10.1145/332040.332486]
• 13: F. Martin , B. Mikhak , B. Silverman, MetaCricket: a designer's kit for making computational devices, IBM Systems Journal, v.39 n.3-4, p.795-815, July 2000
• 14: Brad Myers , Scott E. Hudson , Randy Pausch, Past, present, and future of user interface software tools, ACM Transactions on Computer-Human Interaction (TOCHI), v.7 n.1, p.3-28, March 2000 [doi>10.1145/344949.344959]
• 15: G. E. Pfaff, User Interface Management Systems, Springer-Verlag New York, Inc., Secaucus, NJ, 1985
• 16: Reed, D.G. (ed). The ARRL Handbook For Radio Amateurs, 79th ed. Chapter 20. The American Radio Relay League, Inc. 2001
• 17: Jun Rekimoto , Eduardo Sciammarella, ToolStone: effective use of the physical manipulation vocabularies of input devices, Proceedings of the 13th annual ACM symposium on User interface software and technology, p.109-117, November 06-08, 2000, San Diego, California, United States [doi>10.1145/354401.354421]
• 18: Marc Rettig, Prototyping for tiny fingers, Communications of the ACM, v.37 n.4, p.21-27, April 1994 [doi>10.1145/175276.175288]
• 19: Ulrich, K., Eppinger, S., Product Design and Development. Princeton, NJ: McGraw Hill Higher Education, 1999.

INDEX TERMS

Primary Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)
          Subjects: Input devices and strategies (e.g., mouse, touchscreen)

Additional Classification:
  H. Information Systems
  H.5 INFORMATION INTERFACES AND PRESENTATION (I.7)
      H.5.2 User Interfaces (D.2.2, H.1.2, I.3.6)
          Subjects: Prototyping

General Terms:
Design

Keywords:
interaction and product design, physical user interfaces, rapid prototyping, toolkits