ucsd-et4a

Week 1 - Introduction, Overview, Hands-On

Agenda

• Introductions
• Review Syllabus
  • (basics/outcomes, assignments, policies, schedule, tools/platforms)
• My approach to Electronic Technologies for Art
• Arduino Review Activities
  • Digital Input/Output; Analog Input/Output; Meaningful Signal, Meaningful Interaction.
  • Sign up for discord (see canvas Week 1)
• ~ break ~
• Review and Hands-On: electronics assessment/what do you remember from 147a?
• Assign Homework

Arduino Assessment / Review

Arduino 1: Intro and Digital Input/Output. (slides)

Code Basics

• setup() - runs once, like setup() in processing. reference
• loop() - runs repeatedly, like draw() in processing. reference
• pinMode() - tell the arduino whether to use a pin as an input, an output, or the other things it can do (more later on that). reference
• digitalRead() - reads the input on a digital pin. reference
• digitalWrite() - sets the output on a digital pin. reference

Blink

The hello world of arduino. By default, the arduino will blink a built-in LED (“L”), next to the RX, TX, and POW lights.

• Schematic:
  • (no schematic needed, we will use the built in LED on the Arduino nano)
  • The built-in LED is attached internally to pin 13 on the arduino LED_BUILTIN. (see constants in reference)
• Code:
  • File->Examples->01.Basics->Blink.ino
• Behavior:
  • we will see the LED blinkin on for 1000 milliseconds, and then off for 1000 milliseconds.

Digital Output

https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink

Let’s wire up our own LED attached to a different pin.

• Schematic
  • wire up an LED and resistor to a different pin on the arduino, say D2.
  • we need one resistor (10k)
  • one LED (red?)
• Code
  • Make a copy of your Blink code from above.
  • we need to change the line in setup() where the pinMode() is declared. Change LED_BUILTIN to the

TODO:

• Change the delay(). Experiment with how the delays change the blinking rate and duration.
• Add more blinks. Can you spell out morse code?

Digital Input

https://www.arduino.cc/en/Tutorial/BuiltInExamples/Button

• TODO
  • modify to be a toggle (add a variable that keeps track of on/off)
  • use the button input to call a function

Homework

• Fill out the week 1 survey: (check canvas) (DUE End of day today Oct 2)
  • (basic info, some questions about interest/enthusiasms, choosing office hours, anything else you wish to share)
• Create a Digital Sketchbook (DUE Oct 9)
• Discussion: Reading: Minds and Brains (DUE Oct 9)
• Exercise 1: Meaningful Signal (DUE Oct 9)

References

Arduino Reference

Breadboard

LED

Resistor

from Sparkfun (link)