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Hello everyone

all of you have ever heard about light fringes or you must have done some practical on it in your college/school.as we know fringes are made by the interference of light from as a result we get maxima and minima.These maxima and minima are called fringes.

Today we are going to make a finger maker device from very basic materials.i hope you will like it.lets start....

Step 1: Things You Will Need..........

=> A cardboard box(you can use any material's box).

=> A cutter.

Buy from here:

http://www.ebay.in/itm/ACRYLIC-CUTTER-WITH-3BLADES...

=> A cello tap.

=> An aluminum foil.

Buy from here:

http://www.ebay.in/itm/FOOD-PACKING-ALUMINIUM-FOIL...

=> An Arduino UNO.

Buy from here:

http://www.mouser.com/new/arduino/arduino-uno/

=> A Bluetooth module(HC-05).

Buy from here:

http://www.rhydolabz.com/wireless-bluetooth-ble-c-...

=> An RGB LED module.

Buy from here

https://www.sunfounder.com/rgb-led-module.html

=> Some male to female connecting wires.

=> A pen (Transparent recommend because it will never absorb any light) .

=> A power source (I am using my MacBook as the power source ,you can use anything).

Step 2: Step-1

=>Firstly remove refill of pen and cover whole the pen with aluminum foil except both openings.

=> now make a rectangular hole and a circular hole of the size of Arduino power connector and pen respectively as shown in pictures.

=> Now insert LED module's LED into back opening of the pen as shown in pictures and fix it with the help of tape.

=> Now insert the pen into the circular hole as shown picture and fix it with tape.

Step 3: Connections...

=>Now just connect Bluetooth and RGB LED module to Arduino Uno as shown in the figure.

Connections..........

Arduino Rx => Bluetooth Tx

Arduino Tx => Bluetooth Rx

Arduino 5v => Bluetooth VCC

Arduino GND => Bluetooth GND

Arduino pin 2 => LED R

Arduino pin 3 => LED G

Arduino pin 4 => LED B

Arduino GND => LED GND

Step 4: Programming......

=> Open Arduino IDE,if you don't have you can download from here

https://www.arduino.cc/

=> Now copy and paste this program into Arduino IDE and upload to Arduino or you can download code from here.

https://drive.google.com/open?id=0B4OACSDu386YX3RB...

void setup() {
Serial.begin(9600);

pinMode(2, OUTPUT);

pinMode(3, OUTPUT);

pinMode(4, OUTPUT);

digitalWrite(2,LOW);

digitalWrite(3,LOW);

digitalWrite(4,LOW); }

void loop() {

while (Serial.available())

{

char c=(char)

Serial.read();

Serial.write(c);

delay(300);

if(c=='R')

{

digitalWrite(2,HIGH);

digitalWrite(3,LOW);

digitalWrite(4,LOW);

}

if(c=='W')

{ digitalWrite(2,HIGH);

digitalWrite(3,HIGH);

digitalWrite(4,HIGH);

}

if(c=='B')

{

digitalWrite(2,LOW);

digitalWrite(3,LOW);

digitalWrite(4,HIGH); }

if(c=='G') {

digitalWrite(2,LOW);

digitalWrite(3,HIGH);

digitalWrite(4,LOW); }

if(c=='o') {

digitalWrite(2,LOW);

digitalWrite(3,LOW);

digitalWrite(4,LOW); }

if(c=='O') {

digitalWrite(2,HIGH);

digitalWrite(3,HIGH);

digitalWrite(4,HIGH);

}

}

}

Step 5: Mobile App

You don't need to worry about app development. Just download the app from given link below

(If you want to develop app then comments below i will send you app code).

https://drive.google.com/open?id=0B4OACSDu386YMEVs...

Step 6: Final Step

Just close the box and connect Arduino to the power source and pair Bluetooth HC-05 with app and enjoy.....

About This Instructable

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Bio: Hello My name is Prayag Nao.I am a tech enthusiastic person who does not follow reality,instead I create reality.I am sharing some ... More »
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