How To Make an Arduino Japanese Kotatsu (Heating Table)

How To Make ARDUINO Kotatsu! Kotatsu with ARDUINO starts from scratch, winter project! World's first guide to make Arduino kotatsu.

Jan 7, 2018

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heating

Devices & Components

Arduino Nano

Various screw

5V Relay Module

L bracket

Metal washer

Oil primer

Resistor 330 ohm

Character LCD i2c 16x02

Fuses socket

Resistor 10k ohm

60W Bulb

LED (generic)

Glass Body Fuses(250V 0.6~1A)

Inlet Socket(P)

Speaker: 0.25W, 8 ohms

Push Switch

Cover type Toggle Switch

3P Terminal Block

Shrinkable tube

500Ω Adjustable Resistance

Smartphone 5V Charger

UL1007 AWG24

Inlet Socket(N)

Corner bracket

Steel basket

Finish oil

Rocker Switch

60℃ Bimetal Sensor

Thermistor Sensor

Rubber tree (solid wood)

Hardware & Tools

Hand saw

Electric Trimmer

Soldering iron (generic)

Rubber hammer

Hand drill

Digilent Screwdriver

Electric miter saw

Electric saending

Project description

Code

SIMP TEAM's Kotatsu MK1.zip

arduino

Please Download the file and unzip it.

1//https://www.youtube.com/simpteam
2//SIMP TEAM
3
4#include <Wire.h>   
5#include <LiquidCrystal_I2C.h>   
6#include <sound_effect.h>  
7#include   <thermistor.h> 
8#include <MsTimer2.h>  
9
10
11LiquidCrystal_I2C lcd(0x27,16,2);   
12
13int PotenTiometer = A0;  
14int Thermistor = A1;  
15int PotenTiometer_val;    
16int Relay_Heating = 6;   
17int Heating_LED = 2;  
18int System_Switch   = 4;  
19float Temp; 
20
21uint8_t clock[8] = {0x0, 0xe, 0x15, 0x17, 0x11, 0xe,   0x0};   
22uint8_t heart[8] = {0x0, 0xa, 0x1f, 0x1f, 0xe, 0x4, 0x0};  
23
24unsigned   long this_time = millis();  
25int this_state = 0;   
26
27
28void setup() {    
29  pinMode(Heating_LED, OUTPUT);    
30  pinMode(System_Switch, INPUT_PULLUP);     )
31  pinMode(Relay_Heating , OUTPUT);   
32
33  digitalWrite(Relay_Heating,   HIGH); 
34  lcd.begin();   
35  lcd.backlight();     
36  lcd.clear();     
37   delay(1000);     
38  
39  lcd.print("Hello, SIMP! ^0^"); 
40  delay(500);    
41  lcd.setCursor(0, 1);    
42  lcd.print("KOTATSU MK1-2017");   
43  seSqueak(13);    
44
45  lcd.createChar(2, clock);    
46  lcd.createChar(3, heart);  
47   
48  MsTimer2::set(14400000,timeout);  
49  MsTimer2::start();   
50}
51
52
53void   loop() {     
54
55
56  if(digitalRead(System_Switch) == LOW) {    
57    PotenTiometer_val   = analogRead(PotenTiometer);    
58    PotenTiometer_val = map(PotenTiometer_val,   0, 1023, 30, 40); 
59    Temp = analogRead(Thermistor);   
60
61    lcd.clear();     
62    lcd.print("Temp : ");    
63    lcd.print(ThermistorToC(Temp));   
64     lcd.print("(");
65    lcd.print(PotenTiometer_val);   
66    lcd.print(")");
67     lcd.setCursor(0, 1); 
68
69
70    if(ThermistorToC(Temp)<PotenTiometer_val   && this_state==0) {      
71      digitalWrite(Relay_Heating, LOW);  
72      digitalWrite(Heating_LED,   HIGH);    
73      lcd.print("Heating ON ");     
74      lcd.write(3);    
75     } 
76    
77
78    else{     
79      digitalWrite(Relay_Heating, HIGH);   
80      digitalWrite(Heating_LED, LOW);  
81      lcd.print("Heating OFF ");     
82      lcd.write(2);    
83      this_state =1;    
84    }
85    delay(1000);   
86  }
87  
88  
89   if(ThermistorToC(Temp)>PotenTiometer_val || ThermistorToC(Temp)<PotenTiometer_val   && this_state==1) {     
90    if(this_time + 60000 < millis() ) {    
91      this_time=millis();    
92      this_state = 0;           
93    }
94  delay(1000);   
95   }
96
97
98    if(ThermistorToC(Temp)>50) {   
99    lcd.clear();    
100    lcd.print("Warning");   
101    delay(1000);    
102    lcd.setCursor(0, 1);    
103    lcd.print("High   Temperature");   
104    seAlarm(13);  
105    digitalWrite(Relay_Heating, HIGH);     
106   }
107
108
109   if(digitalRead(System_Switch) == HIGH) {   
110    lcd.clear();   
111    digitalWrite(Heating_LED, LOW);     
112    digitalWrite(Relay_Heating,   HIGH);   
113    lcd.print("bye, SIMP! ^0^");   
114    delay(1000); 
115    lcd.setCursor(0,   1);    
116    lcd.print("Sleep Mode");     
117    delay(1000);    
118   }
119}
120
121void   timeout() {    
122  digitalWrite(Relay_Heating, HIGH);    
123  digitalWrite(Heating_LED,   LOW);   
124  lcd.clear();  
125}

//https://www.youtube.com/simpteam
//SIMP TEAM

#include <Wire.h>   
#include <LiquidCrystal_I2C.h>   
#include <sound_effect.h>  
#include   <thermistor.h> 
#include <MsTimer2.h>  


LiquidCrystal_I2C lcd(0x27,16,2);   

int PotenTiometer = A0;  
int Thermistor = A1;  
int PotenTiometer_val;    
int Relay_Heating = 6;   
int Heating_LED = 2;  
int System_Switch   = 4;  
float Temp; 

uint8_t clock[8] = {0x0, 0xe, 0x15, 0x17, 0x11, 0xe,   0x0};   
uint8_t heart[8] = {0x0, 0xa, 0x1f, 0x1f, 0xe, 0x4, 0x0};  

unsigned   long this_time = millis();  
int this_state = 0;   


void setup() {    
  pinMode(Heating_LED, OUTPUT);    
  pinMode(System_Switch, INPUT_PULLUP);     )
  pinMode(Relay_Heating , OUTPUT);   

  digitalWrite(Relay_Heating,   HIGH); 
  lcd.begin();   
  lcd.backlight();     
  lcd.clear();     
   delay(1000);     
  
  lcd.print("Hello, SIMP! ^0^"); 
  delay(500);    
  lcd.setCursor(0, 1);    
  lcd.print("KOTATSU MK1-2017");   
  seSqueak(13);    

  lcd.createChar(2, clock);    
  lcd.createChar(3, heart);  
   
  MsTimer2::set(14400000,timeout);  
  MsTimer2::start();   
}


void   loop() {     


  if(digitalRead(System_Switch) == LOW) {    
    PotenTiometer_val   = analogRead(PotenTiometer);    
    PotenTiometer_val = map(PotenTiometer_val,   0, 1023, 30, 40); 
    Temp = analogRead(Thermistor);   

    lcd.clear();     
    lcd.print("Temp : ");    
    lcd.print(ThermistorToC(Temp));   
     lcd.print("(");
    lcd.print(PotenTiometer_val);   
    lcd.print(")");
     lcd.setCursor(0, 1); 


    if(ThermistorToC(Temp)<PotenTiometer_val   && this_state==0) {      
      digitalWrite(Relay_Heating, LOW);  
      digitalWrite(Heating_LED,   HIGH);    
      lcd.print("Heating ON ");     
      lcd.write(3);    
     } 
    

    else{     
      digitalWrite(Relay_Heating, HIGH);   
      digitalWrite(Heating_LED, LOW);  
      lcd.print("Heating OFF ");     
      lcd.write(2);    
      this_state =1;    
    }
    delay(1000);   
  }
  
  
   if(ThermistorToC(Temp)>PotenTiometer_val || ThermistorToC(Temp)<PotenTiometer_val   && this_state==1) {     
    if(this_time + 60000 < millis() ) {    
      this_time=millis();    
      this_state = 0;           
    }
  delay(1000);   
   }


    if(ThermistorToC(Temp)>50) {   
    lcd.clear();    
    lcd.print("Warning");   
    delay(1000);    
    lcd.setCursor(0, 1);    
    lcd.print("High   Temperature");   
    seAlarm(13);  
    digitalWrite(Relay_Heating, HIGH);     
   }


   if(digitalRead(System_Switch) == HIGH) {   
    lcd.clear();   
    digitalWrite(Heating_LED, LOW);     
    digitalWrite(Relay_Heating,   HIGH);   
    lcd.print("bye, SIMP! ^0^");   
    delay(1000); 
    lcd.setCursor(0,   1);    
    lcd.print("Sleep Mode");     
    delay(1000);    
   }
}

void   timeout() {    
  digitalWrite(Relay_Heating, HIGH);    
  digitalWrite(Heating_LED,   LOW);   
  lcd.clear();  
}

SIMP TEAM's Kotatsu MK1.zip

arduino

Please Download the file and unzip it.

1//https://www.youtube.com/simpteam
2//SIMP TEAM
3
4#include <Wire.h>  
5#include <LiquidCrystal_I2C.h>   
6#include <sound_effect.h>  
7#include  <thermistor.h> 
8#include <MsTimer2.h>  
9
10
11LiquidCrystal_I2C lcd(0x27,16,2);  
12
13int PotenTiometer = A0;  
14int Thermistor = A1;  
15int PotenTiometer_val;   
16int Relay_Heating = 6;   
17int Heating_LED = 2;  
18int System_Switch  = 4;  
19float Temp; 
20
21uint8_t clock[8] = {0x0, 0xe, 0x15, 0x17, 0x11, 0xe,  0x0};   
22uint8_t heart[8] = {0x0, 0xa, 0x1f, 0x1f, 0xe, 0x4, 0x0};  
23
24unsigned  long this_time = millis();  
25int this_state = 0;   
26
27
28void setup() {   
29  pinMode(Heating_LED, OUTPUT);    
30  pinMode(System_Switch, INPUT_PULLUP);    )
31  pinMode(Relay_Heating , OUTPUT);   
32
33  digitalWrite(Relay_Heating,  HIGH); 
34  lcd.begin();   
35  lcd.backlight();     
36  lcd.clear();     
37  delay(1000);     
38  
39  lcd.print("Hello, SIMP! ^0^"); 
40  delay(500);   
41  lcd.setCursor(0, 1);    
42  lcd.print("KOTATSU MK1-2017");   
43  seSqueak(13);   
44
45  lcd.createChar(2, clock);    
46  lcd.createChar(3, heart);  
47  
48  MsTimer2::set(14400000,timeout);  
49  MsTimer2::start();   
50}
51
52
53void  loop() {     
54
55
56  if(digitalRead(System_Switch) == LOW) {    
57    PotenTiometer_val  = analogRead(PotenTiometer);    
58    PotenTiometer_val = map(PotenTiometer_val,  0, 1023, 30, 40); 
59    Temp = analogRead(Thermistor);   
60
61    lcd.clear();    
62    lcd.print("Temp : ");    
63    lcd.print(ThermistorToC(Temp));   
64    lcd.print("(");
65    lcd.print(PotenTiometer_val);   
66    lcd.print(")");
67    lcd.setCursor(0, 1); 
68
69
70    if(ThermistorToC(Temp)<PotenTiometer_val  && this_state==0) {      
71      digitalWrite(Relay_Heating, LOW);  
72      digitalWrite(Heating_LED,  HIGH);    
73      lcd.print("Heating ON ");     
74      lcd.write(3);    
75    } 
76    
77
78    else{     
79      digitalWrite(Relay_Heating, HIGH);  
80      digitalWrite(Heating_LED, LOW);  
81      lcd.print("Heating OFF ");    
82      lcd.write(2);    
83      this_state =1;    
84    }
85    delay(1000);  
86  }
87  
88  
89   if(ThermistorToC(Temp)>PotenTiometer_val || ThermistorToC(Temp)<PotenTiometer_val  && this_state==1) {     
90    if(this_time + 60000 < millis() ) {    
91      this_time=millis();   
92      this_state = 0;           
93    }
94  delay(1000);   
95   }
96
97
98   if(ThermistorToC(Temp)>50) {   
99    lcd.clear();    
100    lcd.print("Warning");  
101    delay(1000);    
102    lcd.setCursor(0, 1);    
103    lcd.print("High  Temperature");   
104    seAlarm(13);  
105    digitalWrite(Relay_Heating, HIGH);    
106   }
107
108
109   if(digitalRead(System_Switch) == HIGH) {   
110    lcd.clear();  
111    digitalWrite(Heating_LED, LOW);     
112    digitalWrite(Relay_Heating,  HIGH);   
113    lcd.print("bye, SIMP! ^0^");   
114    delay(1000); 
115    lcd.setCursor(0,  1);    
116    lcd.print("Sleep Mode");     
117    delay(1000);    
118   }
119}
120
121void  timeout() {    
122  digitalWrite(Relay_Heating, HIGH);    
123  digitalWrite(Heating_LED,  LOW);   
124  lcd.clear();  
125}

//https://www.youtube.com/simpteam
//SIMP TEAM

#include <Wire.h>  
#include <LiquidCrystal_I2C.h>   
#include <sound_effect.h>  
#include  <thermistor.h> 
#include <MsTimer2.h>  


LiquidCrystal_I2C lcd(0x27,16,2);  

int PotenTiometer = A0;  
int Thermistor = A1;  
int PotenTiometer_val;   
int Relay_Heating = 6;   
int Heating_LED = 2;  
int System_Switch  = 4;  
float Temp; 

uint8_t clock[8] = {0x0, 0xe, 0x15, 0x17, 0x11, 0xe,  0x0};   
uint8_t heart[8] = {0x0, 0xa, 0x1f, 0x1f, 0xe, 0x4, 0x0};  

unsigned  long this_time = millis();  
int this_state = 0;   


void setup() {   
  pinMode(Heating_LED, OUTPUT);    
  pinMode(System_Switch, INPUT_PULLUP);    )
  pinMode(Relay_Heating , OUTPUT);   

  digitalWrite(Relay_Heating,  HIGH); 
  lcd.begin();   
  lcd.backlight();     
  lcd.clear();     
  delay(1000);     
  
  lcd.print("Hello, SIMP! ^0^"); 
  delay(500);   
  lcd.setCursor(0, 1);    
  lcd.print("KOTATSU MK1-2017");   
  seSqueak(13);   

  lcd.createChar(2, clock);    
  lcd.createChar(3, heart);  
  
  MsTimer2::set(14400000,timeout);  
  MsTimer2::start();   
}


void  loop() {     


  if(digitalRead(System_Switch) == LOW) {    
    PotenTiometer_val  = analogRead(PotenTiometer);    
    PotenTiometer_val = map(PotenTiometer_val,  0, 1023, 30, 40); 
    Temp = analogRead(Thermistor);   

    lcd.clear();    
    lcd.print("Temp : ");    
    lcd.print(ThermistorToC(Temp));   
    lcd.print("(");
    lcd.print(PotenTiometer_val);   
    lcd.print(")");
    lcd.setCursor(0, 1); 


    if(ThermistorToC(Temp)<PotenTiometer_val  && this_state==0) {      
      digitalWrite(Relay_Heating, LOW);  
      digitalWrite(Heating_LED,  HIGH);    
      lcd.print("Heating ON ");     
      lcd.write(3);    
    } 
    

    else{     
      digitalWrite(Relay_Heating, HIGH);  
      digitalWrite(Heating_LED, LOW);  
      lcd.print("Heating OFF ");    
      lcd.write(2);    
      this_state =1;    
    }
    delay(1000);  
  }
  
  
   if(ThermistorToC(Temp)>PotenTiometer_val || ThermistorToC(Temp)<PotenTiometer_val  && this_state==1) {     
    if(this_time + 60000 < millis() ) {    
      this_time=millis();   
      this_state = 0;           
    }
  delay(1000);   
   }


   if(ThermistorToC(Temp)>50) {   
    lcd.clear();    
    lcd.print("Warning");  
    delay(1000);    
    lcd.setCursor(0, 1);    
    lcd.print("High  Temperature");   
    seAlarm(13);  
    digitalWrite(Relay_Heating, HIGH);    
   }


   if(digitalRead(System_Switch) == HIGH) {   
    lcd.clear();  
    digitalWrite(Heating_LED, LOW);     
    digitalWrite(Relay_Heating,  HIGH);   
    lcd.print("bye, SIMP! ^0^");   
    delay(1000); 
    lcd.setCursor(0,  1);    
    lcd.print("Sleep Mode");     
    delay(1000);    
   }
}

void  timeout() {    
  digitalWrite(Relay_Heating, HIGH);    
  digitalWrite(Heating_LED,  LOW);   
  lcd.clear();  
}

Downloadable files

Kotatsu Mainbox

It is the main board and controls all of it.

Kotatsu Mainbox

Remote Control Box

This is the remote control needed to activate the Kotatsu.

Remote Control Box

This is the remote control needed to activate the Kotatsu.

Remote Control Box

Full circuit

This is Kotatsu's Circuit Diagram.

Full circuit

Kotatsu Mainbox

It is the main board and controls all of it.

Kotatsu Mainbox

Full circuit

This is Kotatsu's Circuit Diagram.

Full circuit

Documentation

Kotatsu Frame 1

Kotatsu Frame

Kotatsu Frame 1

Kotatsu Frame 3

Kotatsu Frame

Kotatsu Frame 3

Remote Control Box Frame 5

Remote Control Box Frame

Remote Control Box Frame 5

Principle of Kotatsu

Kotatsu Frame 8

Kotatsu Frame

Kotatsu Frame 8

Remote Control Box Frame 1

Remote Control Box Frame

Remote Control Box Frame 1

MainBox Frame 3

MainBox Freame

MainBox Frame 3

Remote Control Box Frame 4

Remote Control Box Frame

Remote Control Box Frame 4

MainBox Frame 1

MainBox Freame

MainBox Frame 1

Kotatsu inner Device

Kotatsu Frame 5

Kotatsu Frame

Kotatsu Frame 5

Kotatsu Frame 3

Kotatsu Frame

Kotatsu Frame 3

MainBox Frame 2

MainBox Freame

MainBox Frame 2

MainBox Frame 1

MainBox Freame

MainBox Frame 1

Kotatsu Frame 8

Kotatsu Frame

Kotatsu Frame 8

Kotatsu Frame 7

Kotatsu Frame 2

Kotatsu Frame

Kotatsu Frame 2

Incandescent Lamp(bulb)

Remote Control Box Frame 3

Remote Control Box Frame

Remote Control Box Frame 3

MainBox Frame 4

MainBox Freame

MainBox Frame 4

Kotatsu Frame 6

Kotatsu Frame

Kotatsu Frame 6

MainBox Frame 3

MainBox Freame

MainBox Frame 3

Remote Control Box Frame 4

Remote Control Box Frame

Remote Control Box Frame 4

Kotatsu Frame 5

Kotatsu Frame

Kotatsu Frame 5

Kotatsu Frame 4

Kotatsu Frame

Kotatsu Frame 4

Remote Control Box Frame 1

Remote Control Box Frame

Remote Control Box Frame 1

Remote Control Box Frame 5

Remote Control Box Frame

Remote Control Box Frame 5

Kotatsu Frame 1

Kotatsu Frame

Kotatsu Frame 1

Remote Control Box Frame 2

Remote Control Box Frame

Remote Control Box Frame 2

Kotatsu inner Device

MainBox Frame 2

MainBox Freame

MainBox Frame 2

Kotatsu Frame 2

Kotatsu Frame

Kotatsu Frame 2

Incandescent Lamp(bulb)

Remote Control Box Frame 2

Remote Control Box Frame

Remote Control Box Frame 2

Remote Control Box Frame 3

Remote Control Box Frame

Remote Control Box Frame 3

MainBox Frame 4

MainBox Freame

MainBox Frame 4

Kotatsu Frame 6

Kotatsu Frame

Kotatsu Frame 6

Kotatsu Frame 4

Kotatsu Frame

Kotatsu Frame 4

Principle of Kotatsu

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