Tech Art and Sound class notes: Feb 28

group project
assignment for thursday: use blogs
review syllabus
art reviews?
Muaz wins the guru prize
workshop class on Thursday

The Concept of sensors

introducing terms: bits, bytes, binary, hexadecimal, ports, shifts
something happens, and we observe
proximity: infrared vs. ultrasonic
other techniques for proximity: capacitive, pyroelectric (?), others?

Logochip with infrared sensor

Introducing the Sharp GP2D120
theory of operation
reading the analog output
connecting to speaker
exploring the code
using LM386. Diagram of op-amp circuit courtesy Joe Paradiso MIT Media Lab

Logochip with Ultrasonic sensor

interfacing with the DEVANTECH SRF05:

Introducing the Devantech SRF05
theory of operation
the capture/control module

connecting the ribbon cable:

yellow: +5V
orange: echo output
red: Trigger input
brown: ground

configuring the Capture/Compare module

capture: wait for event on C2 and read timer values
compare: wait a specific amount of time based on timers

See sections 14 and 15 of the 18F2320 spec sheet.
file:srf_demo.txt
file:srf_demo_easy.txt this code does not work very well. Not recommended.
file:pd film.pd Interface Pd with the Logochip and ultrasonic sensor to control a film
file:asolene.mov The apple snail opens and closes its mouth. Used in the pd file above. Or use your own film.