Published July 21, 2019 © GPL3+

Cellular Controlled Fan

Turn your traditional fan or broken button thrown in the garage into a super fan controlled by your smartphone.

IntermediateFull instructions provided2,686

Things used in this project

Hardware components

Arduino UNO

HC-05 Bluetooth Module

Relay Module (Generic)

5 mm LED: Red

High Brightness LED, White

Phone Charger 5V

Software apps and online services

MIT App Inventor

Hand tools and fabrication machines

Plier, Cutting

Plier, Side Cutting

Tape, Electrical

Soldering iron (generic)

Solder Wire, Lead Free

Story

Do you have a broken button fan?

Do you find it uncomfortable getting up from your bed to change the fan speed?

Video showing the operation.

Would you to like make your own projects and save 70% in cash? instead of buying an automated fan controlled by Bluetooth, with a little money you can convert a traditional fan that changes the speed through a rotary switch to a super fan that can be controlled by your smartphone.

Fan already with automation.

If you look at the image above, it does not change the fan model at all. All the components are embedded inside it, and now we are going to show how it was done.

Note the position of the wires in the selector switch.

There is the marking of each wire color for each speed, observe the one of your vented one and note, because it will be very important for you to organize the programming logic of the relay drive for speed control, as this switch will be replaced by the relay module four channels.

To power the Arduino, the relay module, and the Bluetooth module, we used a 5V voltage source and 3A current source.

Connect it in parallel with the fan power cable.

Then, by plugging the power cord of the fan into the outlet, it will already power the source of the cell phone that will convert the AC power into direct current powering my electronic circuit.

Our social channels:

School: EscolaPixelsdedesigneTecnologia

Teacher: SandroMesquita

Student: Bianor Oliveira

Code

Code of Fun automation

#include <PushButton.h> // uso a biblioteca com controle de debounce 
#define Vmaxima 7 // pino referente ao rele da velocidade maxima
#define Vmedia  6 // pino referente ao rele da velocidade media
#define Vbaixa  5 // pino referente ao rele da velocidade minima

#define pinBotao 4

#define V0 11 // led de refente a velocidade 0
#define V1 10 // led de refente a velocidade 1
#define V2  9 // led de refente a velocidade 2
#define V3  8 // led de refente a velocidade 3

int contador = 0; // variavel do tipo inteiro para fazer a contagem 
int comando;      

PushButton botao(pinBotao); // crio uma classe chamada botao para a porta pinBotao (pino 4)

void setup() {
 Serial.begin(9600);    //Inicio uma comunico serial
 
 pinMode(Vmaxima,OUTPUT); //Defino essa porta como saida
 pinMode(Vmedia,OUTPUT);  //Defino essa porta como saida
 pinMode(Vbaixa,OUTPUT);  //Defino essa porta como saida
 
 pinMode(V0,OUTPUT);    //Defino essa porta como saida
 pinMode(V1,OUTPUT);    //Defino essa porta como saida
 pinMode(V2,OUTPUT);    //Defino essa porta como saida
 pinMode(V3,OUTPUT);    //Defino essa porta como saida

 digitalWrite(Vmaxima,1);  // deligo os reles 
 digitalWrite(Vmedia, 1);
 digitalWrite(Vbaixa, 1);
 
 digitalWrite(V0, 1); // ligo o led vermelho 
}

void loop() {
   botao.button_loop(); 
   
   if (botao.pressed()) contador++; 
  
   if(Serial.available()>0){    //verifico se a comunicao serial esta disnponivel e se ela for maior que "0" ela entra nesse if.
   comando = Serial.read();     //Leio a serial e cerrego na variavel "comando".
   if(comando=='a') contador=1; //Se comando for 'a' contador recebe 1
   if(comando=='b') contador=2; //Se comando for 'b' contador recebe 2
   if(comando=='c') contador=3; //Se comando for 'c' contador recebe 3
   if(comando=='d') contador=0; //Se comando for 'd' contador recebe 0
   }

   
   //VELOCIDADE MINIMA
   if(contador==1){
    digitalWrite(Vmaxima,0);  
    digitalWrite(Vmedia, 1);
    digitalWrite(Vbaixa, 1);

    digitalWrite(V0,0);  
    digitalWrite(V1,0);
    digitalWrite(V2,0);
    digitalWrite(V3,1);
   }

   //VELOCIDADE MEDIA
    else if(contador==2){
    digitalWrite(Vmaxima,1);  
    digitalWrite(Vmedia, 0);
    digitalWrite(Vbaixa, 1);
    
    digitalWrite(V0,0);  
    digitalWrite(V1,0);
    digitalWrite(V2,1);
    digitalWrite(V3,0);     
   }
   
   //VELOCIDADE MAXIMA
    else if(contador==3){
    digitalWrite(Vmaxima,1);  
    digitalWrite(Vmedia, 1);
    digitalWrite(Vbaixa, 0); 

    digitalWrite(V0,0);  
    digitalWrite(V1,1);
    digitalWrite(V2,0);
    digitalWrite(V3,0);
   }
   
   //DELISGADO
    else if(contador==0){
    digitalWrite(Vmaxima,1);  
    digitalWrite(Vmedia, 1);
    digitalWrite(Vbaixa, 1);

    digitalWrite(V0,1);  
    digitalWrite(V1,0);
    digitalWrite(V2,0);
    digitalWrite(V3,0);
   }
    else if(contador==4) contador=0;
  }

Cellular Controlled Fan