Physical Computing with Ruby and Arduino

Matthew Williams@mwilliams

Orlando Linux Users Group

Barcamp Orlando Anyone?

What's Arduino?

http://www.arduino.cc

Arduino•14 Digital I/O (6 PWM)•6 Analog In•16kb Flash Memory

•2kb for boot loader•16MHz Clock Speed•Serial Communication•USB Powered (or AC)•I2C

Arduino haz Flavor?

http://rad.rubyforge.org/

http://github.com/atduskgreg/rad/

Arduino IDE

RAD IDE

Ruby + Physical Computing

•Control an Arduino with Ruby•RubyToC•AVR-GCC

•Most of the Arduino API ported to Ruby•Additional libraries

•Serial communications•Servos

Arduino Codeint ledPin = 13; void setup() { pinMode(ledPin, OUTPUT); } void loop() { digitalWrite(ledPin, HIGH); delay(1000); digitalWrite(ledPin, LOW); delay(1000); }

RAD Codeclass HelloWorld < ArduinoSketch output_pin 7, :as => :led def loop blink led, 1000 end end

RAD Methods•input_pin(s)•output_pin(s)•digitalWrite| digitalRead•analogWrite | analogRead•serial_print | serial_read•Keeping it simple

•It's all about the hardware

Coming Soon•Testing•Arduino Simulator•Better RubyToC Support•More "Out of the Box Support"

•LCD's•OLED Displays•Motors

Arduino Shields

http://www.nycresistor.com/2008/04/21/zach-smith-demos-his-danger-shield/

http://www.liquidware.com/projects/8/Pin+Visualizer

Buy an Arduino

http://www.sparkfun.comhttp://ww.makezine.com

$34.95(or cheaper)

Awesome Resources•http://makezine.com/getstartedarduino/•http://blog.makezine.com/archive/arduino/•http://arduino.cc/playground

Barduino

http://github.com/mwilliams/barduino

The Barduino•Arduino•Breadboard + Wire•Transistors•Relays•Windshield Washer Fluid Pumps•~$60 Total?•2 pumps, could handle 14+

Barduino-tender

http://github.com/mwilliams/barduino-tender

Barduino-tender Recipedrink 'Screwdriver' do serve_in 'Highball Glass' ingredients do 2.ounces :vodka 5.ounces :orange_juice end end

Let's Serve Some Drinks(and look at code)