New Human Computer Interfaces Amnon Dekel HUJI – CSE, Spring 2007 Class 2 March

New Human Computer Interfaces - HUJI - Spring On the Menu Homework review The Technology behind NewChi –Sensors –Actuators –Microcontrollers –Various Data Processing Methods Workshop: Planning a simple Tangible Interface

New Human Computer Interfaces - HUJI - Spring Homework Review Internet research: –Search for a good example of each one of the above New CHI forms (Tangible, Ambient, Multimodal). See the Course site Topics page to startTopics –Create a Personal Wiki page in which you write one paragraph for each example: Description + Link What I think it interesting and good about it Add a link to your page to the NewCHI Wiki Home Page

New Human Computer Interfaces - HUJI - Spring Homework Review Internet research: –Lets take a looklook

New Human Computer Interfaces - HUJI - Spring Homework Review Any thoughts about what is being explored in the field today? Any thoughts about the future of the field?

The Technology behind NewChi

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Sensors Actuators Microcontrollers Various Data Processing Methods

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Sensors –What is a sensor? A sensor is a physical device or biological organ that detects, or senses, a signal or physical condition and chemical compounds. (

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Types of Sensors: –Thermal energy sensors –Electromagnetic sensors –Mechanical sensors –Chemical sensors –Optical and radiation sensors –Acoustic sensors –Biological Sensors (

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Types of Sensors: –Thermal energy sensors temperature sensors: –thermometers, thermocouples, temperature sensitive resistors (thermistors), bi-metal thermometers and thermostats heat sensors: –bolometer, calorimeter (

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Types of Sensors: –Electromagnetic sensors electrical resistance sensors: –ohmmeter, multimeter electrical current sensors: –galvanometer, ammeter electrical voltage sensors: –leaf electroscope, voltmeter electrical power sensors: –watt-hour meters magnetism sensors: –magnetic compass, fluxgate compass, magnetometer, Hall effect device (

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Types of Sensors: –Mechanical sensors pressure sensors: –altimeter, barometer, barograph, pressure gauge, air speed indicator, rate of climb indicator, variometer gas and liquid flow sensors: –flow sensor, anemometer, flow meter, gas meter, water meter, mass flow sensor mechanical sensors: –acceleration sensor, position sensor, selsyn, switch, strain gauge (

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Types of Sensors: –Chemical sensors Chemical sensors detect the presence of specific chemicals or classes of chemicals. Examples include –oxygen sensors, also known as lambda sensors, –ion-selective electrodes, –pH glass electrodes, –redox electrodes. (

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Types of Sensors: –Optical and radiation sensors radiation sensors: –Geiger counter, dosimeter, Scintillation_counter subatomic particle sensors: –scintillometer, cloud chamber, bubble chamber light sensors, or photodetectors proximity sensor scanning laser interferometry. (

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Types of Sensors: –Acoustic sensors sound sensors: –Microphones –Hydrophones –Seismometers. (

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Types of Sensors: –Biological sensors All living organisms contain biological sensors with functions similar to those of the mechanical devices described. (

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi What makes a Good Sensor? –the sensor should be sensitive to the measured property –the sensor should be insensitive to any other property –the sensor should not influence the measured property –In the ideal situation, the output signal of a sensor is exactly proportional to the value of the measured property.

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Sensors: What sensors will you be using? –The 2 most basic ones: Switches (digital input) Photo-Resistors (analog input) –And any others you find that you need…

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Sensors: More information –WikipediaWikipedia –Sensor WIKI (musical instruments)Sensor WIKI –SensEduSensEdu –ITP Sensor Workshop ReportsITP Sensor Workshop Reports

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Actuators –What are actuators? An actuator is the mechanism by which an agent acts upon an environment.

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Actuators –What are actuators? actuators are a subdivision of transducers. –They are devices which transform an input signal (mainly an electrical signal) into motion.

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Actuators –Types of Actuators Electrical motors Pneumatic actuators Hydraulic pistons Relays Comb drives Piezoelectric actuators Thermal bimorphs Digital Micro-mirror Devices Electro-active polymers Etc

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Microcontrollers –What is a MC? A microcontroller (MCU) is a computer-on-a-chip used to control electronic devices.computerchipelectronicdevices It is a type of microprocessor emphasizing self-sufficiency and cost-effectiveness, in contrast to a general-purpose microprocessor, the kind used in a PC.microprocessorPC A typical microcontroller contains all the memory, peripherals and input/output interfaces needed, whereas a general purpose microprocessor requires additional chips to provide these functions.memoryperipheralsinput/output

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Microcontrollers –How do you compare MCs? Speed I/O Ports (digital, analog) AD converters Communications / networking Compilers / Translators Debuggers Programmers Power Consumption etc

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Microcontrollers –What can they do? Open and Close Circuits Execute Algorithms Computation Communication & Networking All within their specific limitations (memory, Speed, Power consumptions, etc)

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Microcontrollers –What will we be using? The Arduino (Open Source Hardware) Atmel ATmega8/168 Based MCU Built in Digital/Analog Pins and Circuits Programmed in Wiring (built on Processing) – a JAVA based language

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi The Arduino

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Microcontrollers –More Information: Wikipedia Introduction to MC’s Nabble Forums Embedded Systems forums Microcontroller.com

New Human Computer Interfaces - HUJI - Spring The Technology behind NewChi Data Processing Methods (briefly) –Image Processing Location Motion Direction –Sound Processing Voice Recognition Amplitude recognition Location

Class Workshop Planning a Simple Tangible Interface

New Human Computer Interfaces - HUJI - Spring Class Workshop 1 Introduction and Goals Group Work Presentations and Discussion

New Human Computer Interfaces - HUJI - Spring Class Workshop 1 Goals –A small project to get you acquainted with designing and implementing a tangible UI prototype.

New Human Computer Interfaces - HUJI - Spring Class Workshop 1 Example: A smart door mat –Counts how many times it has been stepped on –Can react to being stepped on (i.e. Turning the light on, opening the door, etc) –Can tell us how many times it has been stepped on –etc

New Human Computer Interfaces - HUJI - Spring Class Workshop 1 Example: A smart door mat –What do we need to make it? Physical parts Programming Interaction / Interface design

New Human Computer Interfaces - HUJI - Spring Class Workshop 1 Group Work –Break up into groups of 2 –Decide on an Tangible Interface (20 minutes) Input Processing Output –Plan the basic system architecture to make it happen (20 minutes) –Prepare a short presentation (2-3 minutes)

New Human Computer Interfaces - HUJI - Spring Class Workshop 1 Presentations and Discussion –Each group presents their idea and system architecture –Class Discussion

New Human Computer Interfaces - HUJI - Spring Home Work Formalize the project: Project Folio –Description and architecture –Part Needed: Research the parts you will need to make it happen –Psuedocode Create a Project WIKI page with the Project Folio Read the following: – –Arduino booklet pp 8-16Arduino booklet Come ready to next class we will start running with a technology Workshop- so read ahead of time!