DIY Spotwelder - Part 2

I want to make a spot welder for battery packs or other stuff that cannot be soldered.

Feb 23, 2019

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Devices & Components

Arduino Micro

RGB Backlight LCD - 16x2

Hardware & Tools

Soldering iron (generic)

Software & Tools

Arduino IDE

Project description

Code

LCD Spot Welder

c_cpp

1#include <LiquidCrystal.h>
2
3int power = 1920;       // power of   the battery in Watts
4int MOSFETpin = 3;
5int piezopin = 13;
6int lightpin   = 4;
7int footswitchorbutton = 2;
8
9int dlay = 0;
10unsigned long timetilnext;
11unsigned   long locksec;
12int oneafterlocked;
13int prevdlay;
14int prevlock;
15int joule;
16
17const   int rs = 8, en = 7, d4 = 9, d5 = 10, d6 = 11, d7 = 12;
18LiquidCrystal lcd(rs,   en, d4, d5, d6, d7);
19
20void setup() {
21  pinMode(MOSFETpin,OUTPUT);
22  pinMode(footswitchorbutton,INPUT_PULLUP);
23   pinMode(A0,INPUT);
24  pinMode(lightpin,OUTPUT);
25  digitalWrite(lightpin,HIGH);
26   timetilnext = millis();
27  locksec = 0;
28  lcd.begin(16,2);
29  lcd.clear();
30   
31}
32
33void loop() {
34  
35  if(millis() <= timetilnext){
36    locksec   = (timetilnext-millis())/1000;
37    if(locksec != prevlock){
38    lcd.clear();
39     lcd.setCursor(2,0);
40    lcd.print("locked for:");
41    lcd.setCursor(7,1);
42     lcd.print(locksec);
43    lcd.print("s");
44    prevlock = locksec;
45     }
46    oneafterlocked = 1;
47  }
48  
49  
50  dlay = map(analogRead(A0),0,1023,1,15);
51   dlay = dlay*10;
52  
53  if(millis() >= timetilnext){
54
55  if(dlay != prevdlay   || oneafterlocked == 1){
56  joule = dlay/.1000*power/10000;
57  lcd.clear();
58   lcd.setCursor(0,0);
59  lcd.print("Pulse:");
60  lcd.print(dlay);
61  lcd.print("ms");
62   lcd.setCursor(0,1);
63  lcd.print("Energy:");
64  lcd.print(joule);
65  lcd.print("J");
66   oneafterlocked = 0;
67  prevdlay = dlay;
68  }
69  if(digitalRead(footswitchorbutton)   == LOW){
70    tone(piezopin,1000);
71    delay(500);
72    noTone(piezopin);
73     delay(500);
74    tone(piezopin,1000);
75    delay(500);
76    noTone(piezopin);
77     delay(500);
78    tone(piezopin,1000);
79    delay(500);
80    noTone(piezopin);
81     delay(500);
82    tone(piezopin,2000);
83    delay(1000);
84    noTone(piezopin);
85     delay(500);
86    digitalWrite(MOSFETpin,HIGH);
87    delay(dlay);
88    digitalWrite(MOSFETpin,LOW);
89     timetilnext = 5000+millis();
90  }
91  }
92  
93}
94

#include <LiquidCrystal.h>

int power = 1920;       // power of   the battery in Watts
int MOSFETpin = 3;
int piezopin = 13;
int lightpin   = 4;
int footswitchorbutton = 2;

int dlay = 0;
unsigned long timetilnext;
unsigned   long locksec;
int oneafterlocked;
int prevdlay;
int prevlock;
int joule;

const   int rs = 8, en = 7, d4 = 9, d5 = 10, d6 = 11, d7 = 12;
LiquidCrystal lcd(rs,   en, d4, d5, d6, d7);

void setup() {
  pinMode(MOSFETpin,OUTPUT);
  pinMode(footswitchorbutton,INPUT_PULLUP);
   pinMode(A0,INPUT);
  pinMode(lightpin,OUTPUT);
  digitalWrite(lightpin,HIGH);
   timetilnext = millis();
  locksec = 0;
  lcd.begin(16,2);
  lcd.clear();
   
}

void loop() {
  
  if(millis() <= timetilnext){
    locksec   = (timetilnext-millis())/1000;
    if(locksec != prevlock){
    lcd.clear();
     lcd.setCursor(2,0);
    lcd.print("locked for:");
    lcd.setCursor(7,1);
     lcd.print(locksec);
    lcd.print("s");
    prevlock = locksec;
     }
    oneafterlocked = 1;
  }
  
  
  dlay = map(analogRead(A0),0,1023,1,15);
   dlay = dlay*10;
  
  if(millis() >= timetilnext){

  if(dlay != prevdlay   || oneafterlocked == 1){
  joule = dlay/.1000*power/10000;
  lcd.clear();
   lcd.setCursor(0,0);
  lcd.print("Pulse:");
  lcd.print(dlay);
  lcd.print("ms");
   lcd.setCursor(0,1);
  lcd.print("Energy:");
  lcd.print(joule);
  lcd.print("J");
   oneafterlocked = 0;
  prevdlay = dlay;
  }
  if(digitalRead(footswitchorbutton)   == LOW){
    tone(piezopin,1000);
    delay(500);
    noTone(piezopin);
     delay(500);
    tone(piezopin,1000);
    delay(500);
    noTone(piezopin);
     delay(500);
    tone(piezopin,1000);
    delay(500);
    noTone(piezopin);
     delay(500);
    tone(piezopin,2000);
    delay(1000);
    noTone(piezopin);
     delay(500);
    digitalWrite(MOSFETpin,HIGH);
    delay(dlay);
    digitalWrite(MOSFETpin,LOW);
     timetilnext = 5000+millis();
  }
  }
  
}

LCD Spot Welder

c_cpp

1#include <LiquidCrystal.h>
2
3int power = 1920;       // power of  the battery in Watts
4int MOSFETpin = 3;
5int piezopin = 13;
6int lightpin  = 4;
7int footswitchorbutton = 2;
8
9int dlay = 0;
10unsigned long timetilnext;
11unsigned  long locksec;
12int oneafterlocked;
13int prevdlay;
14int prevlock;
15int joule;
16
17const  int rs = 8, en = 7, d4 = 9, d5 = 10, d6 = 11, d7 = 12;
18LiquidCrystal lcd(rs,  en, d4, d5, d6, d7);
19
20void setup() {
21  pinMode(MOSFETpin,OUTPUT);
22  pinMode(footswitchorbutton,INPUT_PULLUP);
23  pinMode(A0,INPUT);
24  pinMode(lightpin,OUTPUT);
25  digitalWrite(lightpin,HIGH);
26  timetilnext = millis();
27  locksec = 0;
28  lcd.begin(16,2);
29  lcd.clear();
30  
31}
32
33void loop() {
34  
35  if(millis() <= timetilnext){
36    locksec  = (timetilnext-millis())/1000;
37    if(locksec != prevlock){
38    lcd.clear();
39    lcd.setCursor(2,0);
40    lcd.print("locked for:");
41    lcd.setCursor(7,1);
42    lcd.print(locksec);
43    lcd.print("s");
44    prevlock = locksec;
45    }
46    oneafterlocked = 1;
47  }
48  
49  
50  dlay = map(analogRead(A0),0,1023,1,15);
51  dlay = dlay*10;
52  
53  if(millis() >= timetilnext){
54
55  if(dlay != prevdlay  || oneafterlocked == 1){
56  joule = dlay/.1000*power/10000;
57  lcd.clear();
58  lcd.setCursor(0,0);
59  lcd.print("Pulse:");
60  lcd.print(dlay);
61  lcd.print("ms");
62  lcd.setCursor(0,1);
63  lcd.print("Energy:");
64  lcd.print(joule);
65  lcd.print("J");
66  oneafterlocked = 0;
67  prevdlay = dlay;
68  }
69  if(digitalRead(footswitchorbutton)  == LOW){
70    tone(piezopin,1000);
71    delay(500);
72    noTone(piezopin);
73    delay(500);
74    tone(piezopin,1000);
75    delay(500);
76    noTone(piezopin);
77    delay(500);
78    tone(piezopin,1000);
79    delay(500);
80    noTone(piezopin);
81    delay(500);
82    tone(piezopin,2000);
83    delay(1000);
84    noTone(piezopin);
85    delay(500);
86    digitalWrite(MOSFETpin,HIGH);
87    delay(dlay);
88    digitalWrite(MOSFETpin,LOW);
89    timetilnext = 5000+millis();
90  }
91  }
92  
93}
94

#include <LiquidCrystal.h>

int power = 1920;       // power of  the battery in Watts
int MOSFETpin = 3;
int piezopin = 13;
int lightpin  = 4;
int footswitchorbutton = 2;

int dlay = 0;
unsigned long timetilnext;
unsigned  long locksec;
int oneafterlocked;
int prevdlay;
int prevlock;
int joule;

const  int rs = 8, en = 7, d4 = 9, d5 = 10, d6 = 11, d7 = 12;
LiquidCrystal lcd(rs,  en, d4, d5, d6, d7);

void setup() {
  pinMode(MOSFETpin,OUTPUT);
  pinMode(footswitchorbutton,INPUT_PULLUP);
  pinMode(A0,INPUT);
  pinMode(lightpin,OUTPUT);
  digitalWrite(lightpin,HIGH);
  timetilnext = millis();
  locksec = 0;
  lcd.begin(16,2);
  lcd.clear();
  
}

void loop() {
  
  if(millis() <= timetilnext){
    locksec  = (timetilnext-millis())/1000;
    if(locksec != prevlock){
    lcd.clear();
    lcd.setCursor(2,0);
    lcd.print("locked for:");
    lcd.setCursor(7,1);
    lcd.print(locksec);
    lcd.print("s");
    prevlock = locksec;
    }
    oneafterlocked = 1;
  }
  
  
  dlay = map(analogRead(A0),0,1023,1,15);
  dlay = dlay*10;
  
  if(millis() >= timetilnext){

  if(dlay != prevdlay  || oneafterlocked == 1){
  joule = dlay/.1000*power/10000;
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Pulse:");
  lcd.print(dlay);
  lcd.print("ms");
  lcd.setCursor(0,1);
  lcd.print("Energy:");
  lcd.print(joule);
  lcd.print("J");
  oneafterlocked = 0;
  prevdlay = dlay;
  }
  if(digitalRead(footswitchorbutton)  == LOW){
    tone(piezopin,1000);
    delay(500);
    noTone(piezopin);
    delay(500);
    tone(piezopin,1000);
    delay(500);
    noTone(piezopin);
    delay(500);
    tone(piezopin,1000);
    delay(500);
    noTone(piezopin);
    delay(500);
    tone(piezopin,2000);
    delay(1000);
    noTone(piezopin);
    delay(500);
    digitalWrite(MOSFETpin,HIGH);
    delay(dlay);
    digitalWrite(MOSFETpin,LOW);
    timetilnext = 5000+millis();
  }
  }
  
}

CD_spot_welder_Serial.ino

c_cpp

1int power = 1920;       // power of the battery in Watts
2int MOSFETpin  = 3;
3int piezopin = 13;
4
5int footswitchorbutton = 2;
6
7int dlay =  0;
8unsigned long timetilnext;
9unsigned long locksec;
10int oneafterlocked;
11int  prevdlay;
12int prevlock;
13int joule;
14
15void setup() {
16  pinMode(MOSFETpin,OUTPUT);
17  pinMode(footswitchorbutton,INPUT_PULLUP);
18  pinMode(A0,INPUT);
19  Serial.begin(9600);
20  timetilnext = millis();
21  locksec = 0;
22}
23
24void loop() {
25  
26  if(millis() <= timetilnext){
27    locksec = (timetilnext-millis())/1000;
28    if(locksec != prevlock){
29    Serial.print("locked for:");
30    Serial.print(locksec);
31    Serial.println("s");
32    prevlock = locksec;
33    }
34    oneafterlocked  = 1;
35  }
36  
37  
38  dlay = map(analogRead(A0),0,1023,1,15);
39  dlay =  dlay*10;
40  
41  if(millis() >= timetilnext){
42
43  if(dlay != prevdlay ||  oneafterlocked == 1){
44  joule = dlay/.1000*power/10000;
45  Serial.print("Pulse:");
46  Serial.print(dlay);
47  Serial.println("ms");
48  Serial.print("Energy:");
49  Serial.print(joule);
50  Serial.println("J");
51  oneafterlocked = 0;
52  prevdlay = dlay;
53  }
54  if(digitalRead(footswitchorbutton) == LOW){
55    tone(piezopin,1000);
56    delay(500);
57    noTone(piezopin);
58    delay(500);
59    tone(piezopin,1000);
60    delay(500);
61    noTone(piezopin);
62    delay(500);
63    tone(piezopin,1000);
64    delay(500);
65    noTone(piezopin);
66    delay(500);
67    tone(piezopin,2000);
68    delay(1000);
69    noTone(piezopin);
70    delay(500);
71    digitalWrite(MOSFETpin,HIGH);
72    delay(dlay);
73    digitalWrite(MOSFETpin,LOW);
74    timetilnext = 5000+millis();
75  }
76  }
77  
78}
79

int power = 1920;       // power of the battery in Watts
int MOSFETpin  = 3;
int piezopin = 13;

int footswitchorbutton = 2;

int dlay =  0;
unsigned long timetilnext;
unsigned long locksec;
int oneafterlocked;
int  prevdlay;
int prevlock;
int joule;

void setup() {
  pinMode(MOSFETpin,OUTPUT);
  pinMode(footswitchorbutton,INPUT_PULLUP);
  pinMode(A0,INPUT);
  Serial.begin(9600);
  timetilnext = millis();
  locksec = 0;
}

void loop() {
  
  if(millis() <= timetilnext){
    locksec = (timetilnext-millis())/1000;
    if(locksec != prevlock){
    Serial.print("locked for:");
    Serial.print(locksec);
    Serial.println("s");
    prevlock = locksec;
    }
    oneafterlocked  = 1;
  }
  
  
  dlay = map(analogRead(A0),0,1023,1,15);
  dlay =  dlay*10;
  
  if(millis() >= timetilnext){

  if(dlay != prevdlay ||  oneafterlocked == 1){
  joule = dlay/.1000*power/10000;
  Serial.print("Pulse:");
  Serial.print(dlay);
  Serial.println("ms");
  Serial.print("Energy:");
  Serial.print(joule);
  Serial.println("J");
  oneafterlocked = 0;
  prevdlay = dlay;
  }
  if(digitalRead(footswitchorbutton) == LOW){
    tone(piezopin,1000);
    delay(500);
    noTone(piezopin);
    delay(500);
    tone(piezopin,1000);
    delay(500);
    noTone(piezopin);
    delay(500);
    tone(piezopin,1000);
    delay(500);
    noTone(piezopin);
    delay(500);
    tone(piezopin,2000);
    delay(1000);
    noTone(piezopin);
    delay(500);
    digitalWrite(MOSFETpin,HIGH);
    delay(dlay);
    digitalWrite(MOSFETpin,LOW);
    timetilnext = 5000+millis();
  }
  }
  
}

Downloadable files

The scematic

The scematic as PDF

The scematic

The scematic as PDF

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