Arduino Christmas Hat

The last time I ask someone to put an ugly sweater as a dare, he came up saying the sweater was not his size, so I though "How about an ugly Christmas Hat?".

With this hat there is not excuse available!!

This is a very cheap and small project that everyone can do at home, and the best part is that you can punish your friend and they cannot escape.

1. Material:
   1. Decoration:
      1. Hat
      2. Carboard
      3. Christmas Balls
      4. Carton

      5. Garland

   2. Arduino:
      1. Arduino Genuino 1
      2. Cables
      3. Small Gear Moto DC
      4. Ultrasonic Sensor HC-SR04
      5. Buzzer
      6. RG led
      7. Resistance (for the RG)
      8. Battery Holder (6V)

      9. DRV8833

2. Tools:

   1. insulating tape

   2. Silicone & Silicone gun

   3. soldering iron & tin

I draw and wrote the general idea, I want to achieve, of course, at the end there were some changes, but this draw as well as the flow chart helps me a lot to orientate myself during the making of the hat.

As the motor should be put vertical, we must do the botton as plane and stable as possible. That is why I folded the metal sticks and cut the plastic.

Moreover to avoid anything getting in the way of the motor gear I covered the motor with insulating tape.

If it is not totally clear, I am giving you the same but wrote also:

1. Ultrasonic sensor
   1. Echo: 6
   2. Trigger: 5
2. Buzzer : 7
3. Motor:
   1. 12
   2. 11
4. RG
   1. Green: 9
   2. Red : 10

I tie the cables going to the GND and the VCC respectively (except from the RG) to only one (one for GND and another one for VCC), so I gain space and use less cables.

I also use the insulating tape to join the RG led and the Motor.

The main idea is :

• If someone put on the hat, the ultrasonic sensor will detect it.
  • The Merry Christmas song will be played by the buzzer
  • The led will be in red
  • The motor will runs to spin the reindeer draw.
• If no one puts on the hat.
  • The led will be in green
  • No sound would be played.
  • The motor is motionless.

I am uploading at the end the code.

I code everything so it works perfectly:

// we define every note we are going to play in the song
#define doh 261,626 #define re 293,665 #define fa 349,628 #define mi 329,628 #define sol 391,995 #define la 440 #define si 493,88 #define doa 523,241 #define rea 587,33

// define the pin of your RG #define GREEN 9 #define RED 10

// define the Pin were the Echo & Trigger will be const int Echo = 6; const int Trigger = 5;

// define the Pin where the Buzzer will be const int music = 7;

// define the Pins where the motor will be const int motor1 = 12; const int motor2 = 11;

void setup() { Serial.begin(9600); pinMode(Trigger, OUTPUT); pinMode(Echo, INPUT); pinMode(music, OUTPUT); pinMode (motor1, OUTPUT); pinMode (motor2, OUTPUT); pinMode (RED, OUTPUT); pinMode (GREEN, OUTPUT);

}

void loop() {

// the Distance will be show in the computer int cm = ping(Trigger, Echo); Serial.print("Distance: "); Serial.println(cm); delay(100);

if (cm < 7) { motorON(); RG_RED(); musica(); return(cm); }

else{ RG_GREEN(); motorOFF(); noTone(music); return (cm); } } void RG_RED() {

digitalWrite(GREEN, LOW); digitalWrite(RED, HIGH);

}

void RG_GREEN() { digitalWrite(GREEN, HIGH); digitalWrite(RED, LOW);

}

void motorON() {

digitalWrite(motor1, HIGH); digitalWrite (motor2, LOW);

} void motorOFF() {

digitalWrite(motor1, HIGH); digitalWrite (motor2, HIGH);

}

void musica() { tone(music, re); delay(500);

tone(music, sol); delay(500);

tone(music, sol); delay(250);

tone(music, la); delay(250);

tone(music, sol); delay(250);

tone(music, fa); delay(250);

tone(music, mi); delay(250);

tone(music, mi); delay(250);

tone(music, mi); delay(250);

tone(music, la); delay(500);

tone(music, la); delay(250);

tone(music, si); delay(250);

tone(music, la); delay(250);

tone(music, sol); delay(250);

tone(music, fa); delay(500);

tone(music, re); delay(500);

tone(music, re); delay(500);

tone(music, si); delay(500);

tone(music, si); delay(250);

tone(music, doh); delay(250);

tone(music, si); delay(250);

tone(music, la); delay(250);

tone(music, sol); delay(500);

tone(music, mi); delay(500);

tone(music, re); delay(250);

tone(music, re); delay(250);

tone(music, mi); delay(500);

tone(music, la); delay(500);

tone(music, fa); delay(500);

tone(music, sol); delay(1000);

tone(music, re); delay(500);

tone(music, sol); delay(500);

tone(music, sol); delay(500);

tone(music, sol); delay(500);

tone(music, fa); delay(1000);

tone(music, fa); delay(500);

tone(music, sol); delay(500);

tone(music, fa); delay(500);

tone(music, mi); delay(500);

tone(music, re); delay(500);

}

int ping(int Trigger, int Echo) { long tiempo, distance;

digitalWrite(Trigger, LOW); delayMicroseconds(4); digitalWrite(Trigger, HIGH); delayMicroseconds(10); digitalWrite(Trigger, LOW);

tiempo = pulseIn(Echo, HIGH); //medimos el tiempo entre pulsos, en microsegundos

distance = tiempo * 10 / 292 / 2; //convertimos a distancia, en cm return distance; }

I make a hole in the hat,between the middle and the back. a rectangle of about 4,3cm and 1,7cm

• I cut the Cartoon in 4 rectangles:
  • 2 of 4,5 cm * 3 cm and the other 2 of 2cm*3cm

Glue it, and stick it to the hat, the hole must be inside the box.

With the help of the insulating tape, you stuck it to the box.

They must be in the middle, I stuck they with silicone

The buzzer can be stick wherever, but it must not be stick upside down, otherwise the sound will be very bad.

Add the battery holder with its respectively batteries, and stick it as well as the Arduino Geniuno UNO

the battery holder I stuck it with silicone meanwhile the Arduino Genuino UNO I stick it with the insulating tape.

Meanwhile I do all the electronic stuff, I encouraged my younger sibling to draw a reindeer using the cardboards. Isn't it cute??????

First it made a hole for the nose in the paper and the cartoon.

I do not want the reindeer to be constanly moving so I stuck it to some carton.

I stuck the reindeer to the motor.

My intention was to light the nose when the hat was worn, so I stuck it very near to the nose so the light do by the led, reach the nose.

As you could see all the electronic part make the hat kind of ... less "Christmas" and do not fit a lot .

So I hide it, by surround it (do not touch) with some garland.

In this way it looks much more beautiful and fits a lot with the theme "Christmas" :)

Finally I used the silicone to add some Christmas balls, that will hang from the hat, constanly moving.

Thanks for reading !!

I just hope you have enjoyed it ,reading it, the same I enjoy it making it.