I programmed a BOEbot with an engineering partner in PLTW to follow shapes, like squares and triangles. Through the use of servos and an Arduino (with a shield), I managed to get the BOEbot to move straight forwards and backwards without turning in any other direction.
Pimp Your Pumpkin
To watch the slideshow videos below, pause the slideshow and click on the play icon. Otherwise, the videos will not play at full length. In this project, I used an Arduino with a Piezo Buzzer, 10 LEDs, and an ultrasonic sensor. Whenever the sensor detects something within 90 centimeters of itself, the red lights will turn on and the green lights will turn off. At the same time, the Piezo Buzzer will begin ringing. The instant that somebody moves away from the ultrasonic sensor and is at least 91 inches away, the red lights will turn off and the green lights will turn back on. The Piezo Buzzer will not make any noise. This project was then placed inside of a pumpkin, so that all of the effects listed above would happen inside of the pumpkin, bringing the pumpkin to life.
Introduction to Arduino
I have a background in programming with PHP, so this Arduino assignment reminded me very much of that programming language. I had a recap on for, if, if else, and while loops. I used them to count, skip count, and count down. I filled out some pages in an Arduino packet where I labeled the parts of an Arduino and explained what certain blocks of code do. One thing that I did not know before was that I had to declare each variable with a data type, like int or float. In PHP, You do not need to do that at all. Also, with Arduino, variables do not have dollar signs. You can not concatenate different sections of code and you are not able to call the value of a variable in the same line as string/text. In PHP, the variable is recognized as a variable, even when mixed with other blocks of code. I also worked with alternating LEDs, making them flash alternately with delays. I then added 2 push buttons and managed to create an if, else if, else loop that allowed me to have the lights do 3 different things depending on if both buttons were pushed, none were pushed, or just one was pushed at one time. All pictures and videos for the LED and pushbutton projects are in the gallery that is the lowest on the page. Also, I did some work with motors. The motors connected one wire to positive (the pin on the arduino), one to negative (ground), and one to the board itself. After some simple code, the motor spun clockwise and counterclockwise until the loop that it was set to ended.
In this activity, I was given an isometric drawing (on the computer) for each sketch. I was told to draw the multiview sketch pertaining to each individual isometric, which there were 6 of. I dedicated one page to the introduction, one page to the conclusion, and one page for each multiview sketch. The last 3 sketches gave me dimensions that I had to follow exactly to retain perfect proportion in the drawings. I multipled many of the dimensions by 2 or 3 so that the drawings would not be too small. This way, I kept the proportions and ratios of all sides of the objects the same, but allowed them to appear larger so that they would be easier to see.
2.1 Isometric Sketching and 2.2 Perspective Sketching
In this activity, I drew isometric sketches. Most of the sketches were practice sketches assigned by the PLTW course, but the last sketch was my choice. The same thing applies for the perspective drawing activity. I drew mostly assigned sketches, and chose my own at the end. My entire process is documented in the pictures below.
The Scientific Method and the Engineering Design Process
In this activity, I was only instructed to create a venn diagram, comparing the (PLTW) Engineering Design Process to the Scientific Method. I decided to actually do research and create a document to better emphasize the differences and similarities of the two.
1.9 Product Evolution
In this activity, I had to track a product or invention of my choice from the beginning of time to now. I chose to do research on the evolution of houses, from 8000 BCE to the modern day houses that we all see and know. Pictures and all research is below.