My homework for ‘Creating w/Code’ was to make a functioning prototype of some type of creation using an Arduino and writing reiterative sketches starting with one LED leading up to 3 LEDs and a Serial Bus:
Q1 What does your Code Look Like to control 1 LED?
I changed the delay to have the LED blink faster:
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin 13 as an output.
pinMode(13, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
delay(500); // wait for a half second
digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
delay(250); // wait for a quarter second
}
Q2 What does your Code Look Like to control 2 LEDs?
I alternated the two LEDs to blink opposite of each other at separate delays:
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin 13 and 10 as outputs.
pinMode(13, OUTPUT);
pinMode(10, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
delay(500); // wait for a half a second
digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
delay(250); // wait for a quarter second
digitalWrite(10, HIGH); // turn the LED on (HIGH is the voltage level)
delay(250); // wait for a quarter second
digitalWrite(10, LOW); // turn the LED off by making the voltage LOW
delay(500); // wait for a half second
}
Q3 What does your Code Look Like to control 3 LEDs?
I added a third LED and made a serial bus for the circuit:
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin 13 and 10 as outputs.
pinMode(13, OUTPUT);
pinMode(10, OUTPUT);
pinMode(7, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
delay(500); // wait for a half a second
digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
delay(250); // wait for a quarter second
digitalWrite(10, HIGH); // turn the LED on (HIGH is the voltage level)
delay(250); // wait for a quarter second
digitalWrite(10, LOW); // turn the LED off by making the voltage LOW
delay(500); // wait for a half second
digitalWrite(7, HIGH); // turn the LED on (HIGH is the voltage level)
delay(333); // wait for a third of a second
digitalWrite(7, LOW); // turn the LED off by making the voltage LOW
delay(333); // wait for a third of a second
}
And here it is:
And to make it functional – A Trippy Lamp:
This project was good because I could add on to the work that I did before and the reiteration helped me to retain the concepts learned along the way. In my previous post I wrote about how I understood MOST of what I was doing, but felt a little more disequilibrium than I would have preferred. Here I was able to put it all together without feeling out of my range. I love the hook of having a product for the prototype – to have a purpose for it. I was in no mood to create flowers (another project suggestion), nor did I have the materials at hand, but I do like my lamp!
I’ve 
Well, I’m embarrassed to say that I ran the wrong code in sudo and totally borked my Pi and have decided to reinstall the OS and start again. Frustrating, but live and learn… At least it’ll give me practice on how to reconfigure the system and luckily I have my own breadcrumbs to follow from this weblog!
In the not so very distant future expect a post on a planned “Scratch Day” in which I will use Scratch on my Raspberry Pi, Scratch on CS First, and my new member of the family, Scratch Jr.
