Sketching with Hardware

Day 2

Course Overview

Day 2

"Hello, Computer!"

II

Arduino

Arduino — Connected

Arduino provides (some) power

Arduino provides (some) power

Arduino Basics

void setup() {
	// Execute these lines ONCE ON BOOT
}


void loop() {
	// Execute these lines ALL THE TIME
}

Serial Console

void setup() {
	Serial.begin(115200);
}

void loop() {
	Serial.println("Hello world!");
}

Digital Input/Output

Digital Output: LED

int LED_PIN = 12;

void setup() {
	pinMode(LED_PIN, OUTPUT);
}
void loop() {
	digitalWrite(LED_PIN, HIGH);
	delay(500);
	digitalWrite(LED_PIN, LOW);
	delay(500);
}

Digital Input: Button

int BUTTON_PIN = 2;
void setup() {
	Serial.begin(115200);
	pinMode(BUTTON_PIN, INPUT);	// Make pin an input
}
void loop() {
	int value = digitalRead(BUTTON_PIN);	// Read what's on that pin
	Serial.println(value);
}

Digital Input: Button

"It does not work!" ☹

→ Residual voltage keeps the pin HIGH!

→ We need to force it LOW somehow!

Digital Input: Pull Up/Down

Keep the Pin HIGH, drag it LOW with the button

int BUTTON_PIN = 2;
void setup() {
	Serial.begin(115200);
	pinMode(BUTTON_PIN, INPUT);	// Make pin an input
	digitalWrite(BUTTON_PIN, HIGH);	// Activate internal pull-up resistor
}
void loop() {
	int value = digitalRead(BUTTON_PIN);	// Read what's on that pin
	Serial.println(value);
}

Analog Input/Output

Arduino Analog Input

int potPin = A0;

void setup() {
	Serial.begin(115200);
}

void loop() {
	int value = analogRead(potPin);	// Read A0
	Serial.println(value);
}

Analog Output

PWM — Pulse Width Modulation

Analog Output

PWM — Pulse Width Modulation

Analog Output: RGB LED

photo credits © todbot.com

Pins: R G − − B B
GND = Cathode = −

Analog Output: Servo

• PWM freq is 50 Hz (i.e. every 20 ms)
• Pulse width ranges from 1 to 2 ms
• 1 ms = full anti-clockwise position
• 2 ms = full clockwise position

Analog Output: Servo

Analog Output: Servo

Servo Guide

"Servos, Oida!" ☺

Digital Output

High Load!

Digital Output

Transistor / MOSFET

Digital Output

Transistor / MOSFET

Digital Output

Transistor / MOSFET

Digital Output

Transistor / MOSFET

Tutorial: How to design a transistor circuit (Youtube)

More Sensors

• Light
• Temperature
• Distance (Infra Red, Ultra Sonic)
• Magnetic Sensors (Reed, Hall-Effect)

Actuators

• Motors
• Servos, Steppers
• Speakers
• Solenoids
• LEDs (RGB)
• Piezos

ICs and Shields

• Motor Drivers (e.g. Pololu)
• Displays (OLED, TFT etc.)
• Sound Modules
• WiFi Modules (e.g. ESP8266)
• Bluetooth (e.g. HC05)

Topic ...

Topic:

Something Old,
Something New,
Something Powered,
Something Woo-hoo!

Tasks

• Get hold of an old/obsolete object!
• Give new life to it!
• Make it interactive!
• Connect it! (Phone, Bluetooth, Wifi, …)
• Think Steampunk!

Some Inspiration

Enhance!

http://www.flickr.com/photos/matthewbyrne/5504362184/

Re-Purpose!

http://www.upcyclethat.com/boom-cases/1947/

Change Context!

http://hackedgadgets.com/2012/11/20/analog-clock-voltmeter/

Make Things Move!

http://www.digitalartsonline.co.uk/tutorials/hacking-maker/hack-toy-using-arduino/

Incorporate Toys!

http://www.jaredaxelrod.com/main/puppets/chubbs/

Inspiration: Marble Machine

Quelle: Wintergatan/Youtube

Components You May Use

• Microcontroller: Arduino UNO/MEGA/MEGA ADK
• Buttons, Sliders, Sensors
• Motors, Servos, Speaker(s)
• Smart phone, Bluetooth, WiFi, …

Recommended Search Terms

• Upcycling
• Arduino
• DIY
• Maker Scene
• Internet of Things
• "Shitty Robots" / "Internet of Sh!@#t"

Brainstorming!

Brainstorming!

• Project Name
• Main Idea
• Features

• Sensors? Actuators?
• Software? Complexity? Costs?
• Plan B?

Raus an die frische Luft!