Monday, December 7, 2015

Interactive Poster

Identify the Problem
We have to build an interactive poster that can teach the viewers something. To make this poster, we have an arduino board, 5 LED's, and at least one capacitance touch sensor.
Research
While I'm making my interactive poster, I can use what I have already learned to make it better. For example I can make the LED's blink and fade. While I'm making the poster, I can also use some other designs people have made to inspire my design. For example in the poster below, a person can touch the button on the board and music will start playing. Instead of playing music, my poster will turn on my LED's or make them blink.

Brainstorm
Below are the ideas I made for my poster.
Plan
The picture above shows what our poster will look like (Partner: Liam ODonnel). There will be 3 LEDs in the stoplight. The color of the LED's will be green, red, and yellow. When there is no one near the sensor(car), the green LED will be on. When there is someone near the sensor, the yellow LED will turn on. When someone is touching the sensor, the red LED will turn on.
Build
The picture above shows the sensor before we put the picture on.
The picture above shows our poster with the sensor.
The picture above shows what our poster looks like (from the back) with the LEDs.
 The picture above shows what the back of out poster looked like when we connected our ground wires.
The picture above shows what the back of our poster looked like when we extended the positive wires (and gave it a tag).
Final

video
The video above shows what our project looked like after we inserted the code. The code we used for the poster is below.
 #include <CapacitiveSensor.h>

int yellow = 11;
int red = 13;
int green = 12;

CapacitiveSensor cs_4_2 = CapacitiveSensor(4,2);

void setup()
{
 cs_4_2.set_CS_AutocaL_Millis(0xFFFFFFF);
 Serial.begin(9600);
 pinMode(green,OUTPUT);
 pinMode(yellow,OUTPUT);
 pinMode(red,OUTPUT);
 
}

void loop ()
{
 long start=millis();
 long totall= cs_4_2.capacitiveSensor(30);
 Serial.print(millis() - start);
 Serial.print("\t");
 Serial.println(totall);
 delay(10);
 if(totall>300) {
   digitalWrite(yellow,HIGH);
   digitalWrite(green,LOW);
     delay(4500);
    digitalWrite(red,HIGH);
   digitalWrite(yellow,LOW);
     delay(6000);
   }  //if  
 else{
   digitalWrite(red,LOW);
   digitalWrite(yellow,LOW);
   digitalWrite(green,HIGH);
 }//else
}//void loop

Reflection
What I like about our interactive poster is that it works just like a real streetlight. However I feel like we could've made the poster cooler if we added bottle caps on the lights. That way it would look more blended and less blinding. I think that an arduino and one capacitive sensor can be used like a light switch. For example when you want to turn the light on, you would touch the sensor turning it on. Then you would turn it off by touching the sensor again.

Thursday, November 19, 2015

Oscillating Circuit

video
The video above shows my circuit operating with an oscillator. When I plug my battery into the circuit, the LEDs turn on and off. How this works is when the capacitor is charging, the LEDs are off. However when the capacitors discharge, the LEDs turn on. That's why the LEDs turn off and on.

Tuesday, November 17, 2015

Capacitor

The picture above shows a circuit I built with a capacitor. A capacitor is used to store energy. Unlike batteries, capacitors don't make electrons,. They store it until it needs to be used again.

Friday, November 13, 2015

Transistor

Picture
This is a picture of my circuit with a transistor.
Explanation
All transistors have three parts. The base, collector, and the emitter. The base acts like a gate, the collector is the part that holds the electricity, and the emitter is the outlet. The base is made from silicon, a substance that acts like both a conductor and insulator. How it works is there are empty spaces there where electrons should be. When turned off nothing can get through it. However when it's turned on, energy can get through it. So in the circuit I made the electricity in me goes through the transmitter and powers up the LED.

Monday, November 9, 2015

Wednesday, October 21, 2015

How To Build A DC Motor

Identify the Problem
I need to make a simple DC motor. I will have a magnet, magnet wires, a battery snap, a piece of wood, tape, and paper clips to build with.
Research
While researching, I found 5 pictures of simple DC motors and 2 videos on how to build a simple DC motor.

Build
This is what my DC motor looked like after I finished building it.
Test

video
This is how my DC motor did when I finished building it.
Explanation
How a DC motor works is when the coil is powered up, it creates a magnetic field that is opposite to the permanent magnet. So when you place the magnet near the magnetic field, it forces the coil to move. The reason why the motor goes on and off is because one side of the coil still has some paint while the other has none.

Monday, September 28, 2015

Rubber Band Airplane Challenge

Identify the Problem
The rubber band airplane challenge is a challenge to build an airplane powered by a rubber band and make it stay in the air as long as possible. For this challenge we're going to fly our airplanes in the auxiliary gym. To make the airplane we only have  a rubber band, a propeller, balsa wood, and tissue paper.
Research
While researching I found several pictures that can assist me in building my airplane.
Brainstorm
The pieces I wanted to add on my rubber band airplane was shown on the top of the paper. It shows my vertical and horizontal stabilizer and my wings. Below that shows two airplanes. These airplanes have the design I wanted to go with for my rubber band airplane.
Plan
The picture above shows the pieces I need to cut out, build, and attach to my rubber band airplane.
Build
The picture above shows the fuselage, landing gear, and propeller for my rubber band airplane.
The picture above shows my first final version of my rubber band airplane.
Test
video
The video above shows how my original plane (with an extension) flew.
Identify The Problem
While I was testing my plane, the problem I identified was that the plane wasn't flying. To fix the problem of my plane not staying in the air, I increased the width of my wings. However after I increased the width of my plane, I found another problem. The problem was that when the plane flew to the air, it would quickly dive to the ground.
In order to fix this problem I attached the end of my extension to the back of my plane so the nose would point downward a little more when it is flying so it wouldn't go all the way up then straight down.
Test
  video
When I tested my plane again, the nose stayed more in the middle and wouldn't dive to the ground immediately. Instead it would fly in the air, then go down a little and keep on flying, then land.
Reflect
Some positives of my final design are, it stayed in the air for a decent amount of time and when it was going to fall, it went up again. If I had more time to work on my rubber band airplane, I would increase the width of the wing. I would do this so the plane could stay in the air longer. I would also detach the end of my extension and add ailerons (pointing down). I would do this so the plane would go higher in the sky instead of flying close to the ground. One tip I would give someone who wants to build a rubber band airplane is when they are planning out the pieces on the airplane, imagine them on the plane so you can get a more accurate version of what you want. Also I would tell them to wind up their airplane more because how much you wind up your plane will affect it's flight.