Introduction: Robot Casing

Picture of Robot Casing

We made a robot that people can chase while the robot avoids them and objects. We wanted to have a case for the robot that will make it more safe and fun looking. Read on for how the case was done.

Step 1: Supplies

Picture of Supplies

Big Teddy Bear


Cardboard box

Stapler and staples




Conductive Tread

20 Yellow LED

20 Red LED


LilyPad Arduino

Speaker (comes with Arduino)

Light Sensor (comes with Arduino)

Step 2: Making the Case

Picture of Making the Case

1. Make a mold using the cardboard box

(We placed the box over the robot and arranged the box to fit)

**This step will change depending on your robot’s shape and size.

The following figures are our cardboard mold.

2. Buy teddy bear and bunny from Desert Industries (DI)

3. Cut into the bear so that you just have the body and can attach the bunny head.

4. Staple or glue the body of the bear onto the mold you made

5. Cut into the bunny for the head and feet

6. Sew the head and feet onto the bear’s body which is on the mold

7. The tail of the bunny/bear is the leg of the bear cut down to look like a bunny tail.

8. We added an American flag to the back of the robot, as a type of bumper sticker. Vladimir loves showing off his American pride.

Step 3: Making the Racing Stripe

Picture of Making the Racing Stripe

1. Draw out your circuit diagram! Make sure all the positive sides of the LEDs are connected to only each other and the negative sides of the LEDs are all connected to each other; in other words the LEDs are in parallel. The negative side of the LED is the side that is shorter and the LED is more flat on that side. ( see picture 1

2. To get the lights to make a pattern and look cool, we mixed the red and yellow LEDs in the same line and wanted the color lights blink at different times. This is why in the circuit diagram you see that some of the lights are disconnected from the other line of lights. It is important to make sure your wires or in our case conductive thread does not cross. When our threads were going to overlap each other we would put felt down between the threads so that the threads would not touch each other. (that is the yellow in the picture) Each line of negatives is connected to the negative pin on the LilyPad and the positive side of the yellow LEDs are connected to A3 and the positive side of the red LEDs are connected to A4 on the LilyPad. see picture 2,3,4,5 above

3. We printed a racing stripe pattern on some paper and then put colina oil on the paper to make it transparent like. We then put the lights on the side of the case and the racing stripes on top of the lights. see picture 6,7 above

Step 4: Coding the Lights

Coding was done using

a LilyPad and Arduino

//saying what each pins connected to

int redLed=A2;

int yellowLed=A3;

int brightness=0;

int fadeAmount=10;

//setting up the pins as outputs so can output light

void setup(){




void loop()


//turn on all the lights


delay(1000); //must delay so can see the action for at least 1 second



//have the yellow LEDs fade out






//turn off the red LED



//turn on and then off the yellow LEDs






Step 5: Making the Sensor

Picture of Making the Sensor

We wanted to have the robot play Beyonce’s song To the Left anytime the robot turned left and to play Choose the Right, an LDS Hymn, anytime the robot turned right. However, we had too much trouble with programming a tilt sensor so we choose to make the robot play the songs depending on how much light was exposed to the light sensor.

1. Draw your circuit diagram! The light sensor has three different connections that must be connected to the LilyPad Arduino. S is connected to A3 where the negative is connected to a negative pin and the positive is connected to the positive pin of the LilyPad. The speaker positive pin is connected to pin 9 on the LilyPad and the negative pin to the negative on the LilyPad. see picture 1

2. Sew on the speaker and light sensor as seen in your diagram. see picture 2

Once again make sure your threads do not touch each other. If they will touch add felt between so that they do not.

3. Sew or staple the sensor onto your case. see picture 3

It is important to sew the LilyPad on felt or similar material. We originally sewed on to a silk like material and that caused the LilyPad to smoke and die! see picture 4

Step 6: Coding the Sensor

Lanetta’s fiancé, Andrew, helped us know what the notes are of the songs and then when testing the songs telling us which notes where off. He was a great help!

Knowing the frequency of the notes was hard at first. It helped once we realized how the notes matched the piano on the following website: (Thanks for the help Andrew!) Arduino has a library for notes but we had already done the frequencies for the notes. If you use the library the songs will not work if you mix in the notes you define using frequencies. To know what kind of values the light sensor reads with various light expose you can use the serial code that is given in Arduino.

//Pin Setup

int speaker=9;

int sensorPin = A3; // Light Sensor connected

int sensorValue; // variable to store the value coming from the sensor

//Website for the notes:

int a=440;

int b=493.883;

int c=523.251;

int e=329.628;

int mc=261.626;

int d= 293.665;

int f=349.228;

int eflat=311.127;

int bflat=466.164;

int g=391.995;

int nosound=0;

//To The Left

//All the notes are put into an array

int totheleft []={d,f,f,d,f,f,nosound,eflat,f,f,eflat,f,f};

//how long each note is 4=quater note, 3=quater with dot, 8=eighth note, 2=half note

int durationleft[]={16,16,8,16,16,4,1,16,16,8,16,16,4};

//Choose the Right, beginning of song

int chooseright[]={e,f,g,g,g,a,c,b,a,g,e,d,e,f,g,b,a,g,f,e};

int durationCTR[]={4,4,3,16,16,8,8,8,8,4,4,4,4,3,8,9,16,8,8,2};

//Setting up the pins, A3 is an input (how much light) where the speaker is an output (there is noise coming out)

void setup()



pinMode(A3, INPUT);


void loop()


sensorValue = analogRead(sensorPin); // read the value from the sensor

if (sensorValue >=40 && sensorValue <= 100) //Light Detected


for(int thisNote=0; thisNote<100; thisNote++){ //go through the array of notes

int noteDuration=18000/durationleft[thisNote];

tone(speaker,totheleft[thisNote],noteDuration);//play each not

delay(noteDuration*0.30);//have a short time between each note so the ear can hear the note




else if (sensorValue>101){ //lots of light detected

for(int thisNote=0; thisNote<100; thisNote++){

int noteDuration=18000/durationCTR[thisNote];






else //No Light Detected


noTone(9); //do nothing



Step 7: Completed Project

Picture of Completed Project


This is the cutest robot ever!