Lab Session 1 26th June

Using Arduino Uno

To get used to using the Arduino we first built a circuit with a 5V battery, a red LED and resistors of varying magnitude (either 100 ohms or a 1000). This was assembled on a generic breadboard with one pin in the 5V position on the UNO and the other in the ground (GND) position.

After we lit up the LED we connected the circuit to our laptops and used the Arduino application to run variations of different programs available on Arduino. I used the Blink and Fade programs and changed the time delay setting. I have posted both these codes below (both can be found on Link Description)

`Blink

Turns an LED on for one second, then off for one second, repeatedly.

Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to the correct LED pin independent of which board is used. If you want to know what pin the on-board LED is connected to on your Arduino model, check the Technical Specs of your board at: https://www.arduino.cc/en/Main/Products

modified 8 May 2014 by Scott Fitzgerald modified 2 Sep 2016 by Arturo Guadalupi modified 8 Sep 2016 by Colby Newman

This example code is in the public domain.

http://www.arduino.cc/en/Tutorial/Blink */

// the setup function runs once when you press reset or power the board void setup() { // initialize digital pin LED_BUILTIN as an output. pinMode(LED_BUILTIN, OUTPUT); }

// the loop function runs over and over again forever void loop() { digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second }`

`Fade

This example shows how to fade an LED on pin 9 using the analogWrite() function.

The analogWrite() function uses PWM, so if you want to change the pin you’re using, be sure to use another PWM capable pin. On most Arduino, the PWM pins are identified with a “~” sign, like ~3, ~5, ~6, ~9, ~10 and ~11.

This example code is in the public domain.

http://www.arduino.cc/en/Tutorial/Fade */

int led = 9; // the PWM pin the LED is attached to int brightness = 0; // how bright the LED is int fadeAmount = 5; // how many points to fade the LED by

// the setup routine runs once when you press reset: void setup() { // declare pin 9 to be an output: pinMode(led, OUTPUT); }

// the loop routine runs over and over again forever: void loop() { // set the brightness of pin 9: analogWrite(led, brightness);

// change the brightness for next time through the loop: brightness = brightness + fadeAmount;

// reverse the direction of the fading at the ends of the fade: if (brightness <= 0 || brightness >= 255) { fadeAmount = -fadeAmount; } // wait for 30 milliseconds to see the dimming effect delay(30); }`

Soldering Iron

The soldering iron is used to melt iron wire at 700-800° F to attach an Arduino Nano to a breadboard. The image below shows a Nano attached to a breadboard.