Arduino workshop

table of contents:
microprocessor?
arduino?
example projects
composition
material
behavior
choreography
translator
urban agent
resources
output
input + output

what is a microchip? tiny, inexpensive, computer which can
interact with the physical world
feedback
sensors
microphone
infrared sensor
C02 sensor
compass
motor
LED
valve
speaker
actuators
μ chip
brain
=
programmed
behavior

hardware
“augmented” microchip
higher level
programming
+ +
very popular
(fora galore)
software community
what is an Arduino?

Arduino developement environement

1. download arduino software (https://www.arduino.cc/en/Main/Software)
blink: software
2. plug in arduino to laptop with USB cable
5. select board > Arduino Genuino / UNO
3. run Arduino software
6. select COM Port > COMXX (windows) or dev/...Arduino Uno (Mac)
*Windows Device Driver install (Device Manager > Update Driver >
select Arduino/Drivers folder)
4. file > examples > basic > blink

syntax
functionName (argument 1, argument 2)
{
do something
between curly
brackets
}
semicolons for most line endings;
// comments after double slashes
/* comments
between
star slashes */

asked to choose a sketch folder name: this is where your Arduino sketch
will be stored. Name it Blinking_LED and click OK. Then, type the following
text (Example 01) into the Arduino sketch editor (the main window of
the Arduino IDE). You can also download it from www.makezine.com/
getstartedarduino. It should appear as shown in Figure 4-3.
// Example 01 : Blinking LED
#define LED 13 // LED connected to
// digital pin 13
void setup()
{
pinMode(LED, OUTPUT); // sets the digital
// pin as output
}
void loop()
{
digitalWrite(LED, HIGH); // turns the LED on
delay(1000); // waits for a second
digitalWrite(LED, LOW); // turns the LED off
delay(1000); // waits for a second
}
blink: software
comment
(for humans)
part of code
where we define
input/output pins
Required in every
Arduino sketch
main code which
will be repeated
over and over.
Required in every
Arduino sketch
do nothing for
1000 milliseconds
(one second)
do nothing for
1000 milliseconds
replace “LED”
with “13”
when compiled
set pin 13 to
OUTPUT
sets pin 13
to 5V
sets pin 13
to GND
*HIGH = 5V
LOW = 0V

blink: software uploading
Arduino Code Hex Code
compiling uploading
Microchip
Flash
memory

blink: hardware
analog in pins
microchip
digital in/out pins
power pins
USB
connector
reset
button
power
connector

discrete,
finite
smooth,
continuous
the real
world is
analog
microchips
are digital
analog vs digital

specialized pins
needs power (+)
can convert
analog to digital
can compare
voltages
Can talk to computers
has a clock
has reconfigurable
sensing and
actuating pins
can “interrupt”
itself

blink: hardware Arduino must be plugged in...
...to your computer,
in order to download
the code.
after being programmed:
(USB cable also supplies 5V)
can be battery powered
or plugged into wall
adapter (no longer needs
computer).

blink: the breadboard
power rails = horizontal
component
rails =
vertical

blink: hardware
physical object symbolic representation

blink: hardware
LED Polarity (the property of
having poles or being polar):
circuit symbol
Anode
Cathode
physical object

resistors do not have polarity
circuit symbol
physical object

upload blink (you may be asked to Save first) and the check console
blink: uploading!

blink: modifying software
change delay values...what happens?
Pulse Width Modulation (PWM)

microchips operate
faster than human
sensory apparatuses
human eyes can detect:
<60-90 Hz
human ears can detect:
20 - 20,000Hz
our microchip
runs at
16 MHz!!
blink: Thresholds of human perception

blink: modifying hardware
change LED for buzzer, what happens?

fade: modifying software
5V
0V
Time

Debugging Tips:
-the compile button
-display line numbers (File > Preferences)
-the serial monitor and serial printing (make sure same baud rate)
-isolate, test one thing at a time.
-metal connections are exposed on the bottom of
the board, beware of stray bits of metal or metal
tables.
-if your arduino is turning off right after turning
on, it’s probably shorting (ground and power are
connected).

diagnostic tools: mulitmeter & oscilloscope
measures voltage and current
at single location and time
multimeter oscilloscope
measures voltage and current
at multiple locations and times

// Example 03A: Turn on LED when the button is pressed
// and keep it on after it is released
#define LED 13 // the pin for the LED
#define BUTTON 7 // the input pin where the
// pushbutton is connected
int val = 0; // val will be used to store the state
// of the input pin
int state = 0; // 0 = LED off while 1 = LED on
void setup() {
pinMode(LED, OUTPUT); // tell Arduino LED is an output
pinMode(BUTTON, INPUT); // and BUTTON is an input
}
void loop() {
val = digitalRead(BUTTON); // read input value and store it
// check if the input is HIGH (button pressed)
// and change the state
if (val == HIGH) {
state = 1 - state;
}
if (state == 1) {
digitalWrite(LED, HIGH); // turn LED ON
} else {
digitalWrite(LED, LOW);
}
}
Now go test this code. You will notice that it works . . . somewhat. You’ll
declare an
INPUT too
if statement
checks a
condition and
executes the
proceeding
statement if the
condition is
“true”
*1 = TRUE
0 = FALSE
button: software
variable =
box for storage

hyperactive machine: debouncing
one button press = microscopic “bouncing” from the
perspective of the microchip

introduce
multiple readings
taken at different
times to solve
the bouncing
probem
debounce: software
// Example 03B: Turn on LED when the button is pressed
// and keep it on after it is released
// Now with a new and improved formula!
#define LED 13 // the pin for the LED
#define BUTTON 7 // the input pin where the
// pushbutton is connected
int val = 0; // val will be used to store the state
// of the input pin
int old_val = 0; // this variable stores the previous
// value of "val"
int state = 0; // 0 = LED off and 1 = LED on
void setup() {
pinMode(LED, OUTPUT); // tell Arduino LED is an output
pinMode(BUTTON, INPUT); // and BUTTON is an input
}
void loop(){
val = digitalRead(BUTTON); // read input value and store it
// yum, fresh
// check if there was a transition
if ((val == HIGH) && (old_val == LOW)){
state = 1 - state;
}
old_val = val; // val is now old, let's store it
if (state == 1) {
digitalWrite(LED, HIGH); // turn LED ON
} else {
digitalWrite(LED, LOW);
}
}

stepper motors
servos
LCD display
potentiometer
humidity sensor
ultrasonic rangefinder
buttons
LEDs
temperature sensor
humidity sensor
our supplies today:

stepper motors
potentiometers
humidity
IR rangefinder
LCD
temp

reuse existing code!
find code online and use it
if you’re a beginner, don’t bother
making anything from scratch just yet.
(The more popular the sensor/actuator
the easier this will be to find online)

Libraries
premade packages of software
procedures which save you time.
libraries provide extra
functionality for use in sketches,
e.g. working with hardware or
manipulating data.

1. Find thing you want to talk to
2. Find and download the library
3. Get experimenting!
eg. radio transmitter/reciever
Libraries

1. 3.
2. 4.
Libraries: installing

Try not to fry your Arduino yo

mosfet = electrically-controlled valve

stepper motors
plotting machine foam cutting machine

Arduino workshop

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