1. Roller Coaster Design Project
Lab 4 Prelab: Arduino Introduction

2. Learning Objectives Become familiar with:
The Arduino brand microcontroller
programming the Arduino for basic functionality
Arduino C-code
uploading, testing and troubleshooting programs 2

3. Hardware The basic Arduino Uno board: Digital Ports Reset Switch
USB Port
Arduino ATMega328
Power Socket
Analog Ports

4. Arduino Software
You will use the Arduino extensively as part of your add-on
Development Tools are available for free at arduino.cc for Windows, Linux, and Mac
Development is done in a variant of the C language. See the 'Crash Course in C' document for more information, if need be
All programs stored in the “Sketchbook” folder in your documents directory (depends on platform)
LOTS of existing libraries for various functions
Not expected to be an expert. If you need help with a topic, ask!

5. Setting Up Your Device Open the Arduino IDE
Go to the Tools → Board menu
Locate and select your device.
Select the appropriate COM port
Restart the Arduino IDE

6. Parts of an Arduino Program
Arduino programs always contain three things:
The header space – libraries included here, constants declared, etc.
The setup() function
The loop() function
Both setup() and loop() will be discussed next
You can have more than this, if needed. In particular, user functions can be included after the loop() function

7. The setup() and loop() functions
Function runs once when the Arduino starts running
Used for initialization of global variables, setup of various hardware, and so on
After first run, never runs again
loop()
Runs continuously for as long as the Arduino has power
When loop exits, it is automatically called again
Used for main program functionality, monitoring sensors, control of other inputs and outputs.

8. Your First Program Enter the following into a new sketch: void setup(){
Serial.begin(9600);
delay(1); // stalls for 1s
Serial.write(“Hello World!”); }
void loop() {}

9. Programming the Device
Connect your Arduino to your computer via USB
Make sure the correct device and port are selected
Press the “Play” button
Use the built-in serial monitor to watch your code run (Ctrl+Shift+M on Windows and Linux). Make sure the speed is set to 9600.

10. Questions?