Soldering iron temperature controlled

[MynameIsRain]

hello good day,

i would like to ask if i can use this diagram for my diy temperature controlled soldering iron.

[LA7SJA]

Technically, it is not a temperature controller. It only adjusts power supplied to the soldering iron. This construction lacks a temperature sensor that adjusts the supplied power as a function of the temperature of the soldering iron.

Johan-Fredrik

[MynameIsRain]

so it means i call this power controlled?? can i use this for lessen or higher the power of soldering iron??

[LA7SJA]

That is 100% correct, you are the temperature controller in this case. If the iron is to cold you give it som more power and when it's to hot you just give it less power, easy as pie.

Johan-Fredrik

[MynameIsRain]

did someone here make a DIY temperature controlled soldering station??

[VK5RC]

I bought a Weller WSP 80 clone that didn't 'talk' to my base station, but it was quite well made so I made a little base station for it and my daughter (12yo) uses it now.
The basic design was similar to the link below, I used an Arduino (I'm too lazy to use a PIC) and my code is below. One issue was to get the delay in update at the correct timing to avoid too much over shoot. Pretty rough really but it works ok.
Hope this is of help

http://eosystems.ro/index.php/projects/esol
#include <Arduino.h>
#include <LiquidCrystal.h>
//Detects Temperature (Voltage), Displays, turns on heating element if below set temperature, reads 2 buttons to set temperature
//For Soldering Iron
// sensorValue=iron temp,   settemp=desired iron temp

  LiquidCrystal lcd( 8, 9, 4, 5, 6, 7 ); // A basic LCD setup programme

void setup () {
  pinMode (12, OUTPUT);                //Sets pin 12 as output (iron heating element on)
  //pinMode (13, OUTPUT);              //sets pin13 as output SPARE
  //pinMode (11, OUTPUT);              //sets pin11 as output spare
  pinMode (A2, INPUT_PULLUP);          //sets pin 2 as input, with pullup resistor for button COOLER (shorts to earth, LOW = ON)
  pinMode (A0, INPUT);                //Sets pin 0 as input, Volatge  "sensorValue"
  pinMode (A1, INPUT_PULLUP);          //sets pin 1 as input with resistor pullup for button  HOTTER (shorts to earth, LOW = ON)

  lcd.begin(16, 2);               //initiates LCD size etc
  lcd.print(" SOLDERING");  //print text
  lcd.setCursor(0,1);            //moves cursor
  lcd.print("   STATION");          //print text
  delay(2000);                   //pauses so can be read
 
}
int temp=300;                                    //sets initial set temp at 300C                 


void loop(){

float sensorValue = analogRead(A0)*1.28 ;    //reads voltage and does maths operation to calculate temp C
 
lcd.setCursor(0,0);              //set cursor at beginning of screen

 lcd.clear();                  //clears lcd
 lcd.write("TEMP = ");        // writes voltage (temperature) on screen
 lcd.setCursor(7,0);          //places cursor
 lcd.print(sensorValue, 1);       // reads voltage/power
 lcd.write(" C");

delay(200);
{
 if(sensorValue < temp)     // switches on heater if temp below set temp
 {
   digitalWrite(12, HIGH);
 }
else
 {
   digitalWrite(12, LOW);     //switches off heater
}

if (digitalRead(A2) == LOW)  {    // reads lower set temp button and lowers set temp
  if (temp > 100); {
  temp = temp - 10;
  }
  }
if (digitalRead(A1) == LOW)  {    // reads lift set temp button and raises set temp
  if (temp < 400); {
    temp = temp + 10;
  }
  }


}}