What This Document Is
This resource is a focused exploration of sensor technology within the context of tangible user interfaces. Specifically, it delves into the practical application of photocells and force-sensitive resistors – two key components used to create interactive and responsive physical experiences. It’s part of a larger course on special topics in information, offered at the University of California, Berkeley (INFO 290), and centers around a hands-on, project-based learning approach. The material is presented alongside lecture notes from Week 5, focusing on sensing theory and practice.
Why This Document Matters
This material will be invaluable to students and hobbyists interested in physical computing, interaction design, and the creation of tangible interfaces. If you’re looking to build projects that respond to light levels or physical pressure, or if you need a deeper understanding of analog input and how to integrate sensors with microcontrollers, this resource will provide a solid foundation. It’s particularly useful for those working with Arduino and Processing, and seeking to bridge the gap between the digital and physical worlds.
Topics Covered
* Fundamentals of resistive sensors
* Characteristics and applications of photocells (photoresistors)
* Characteristics and applications of force-sensitive resistors
* Voltage divider circuits and their relevance to sensor readings
* Interfacing sensors with Arduino microcontroller boards
* Utilizing Processing for data visualization and interaction
* Serial communication between Arduino and Processing
* Practical experimentation with sensor calibration and responsiveness
What This Document Provides
* Illustrative diagrams of sensor connections and circuit configurations.
* Discussions on the principles behind how these sensors function.
* Contextual information regarding the use of Processing’s Serial library.
* References to external resources and projects for further exploration.
* An overview of in-class exercises designed to reinforce learning.
* Comparative insights into the cost and potential applications of different sensors.