Published November 22, 2016 © GPL3+

Dappy Habber (Vaporizer)

Ever have a craving for the perfect temperature vaporization of your favorite products? Well Pinky and I did so we created the Dappy Habber!

IntermediateFull instructions provided2 hours1,331

Things used in this project

Hardware components

RobotGeek Geekduino

RobotGeek Sensor Shield

RobotGeek Rotation Knob

RobotGeek Relay

MAX6675

Thermocouple Amplifier. Alternatives: https://www.adafruit.com/products/269

RobotGeek 4 Line I2C LCD w/ Mount

Story

Introduction

Well, it's true what they say. Low temp is the way to go! But what do you do when you are two mice on a budget and your torch just isn't cutting it? Utilize the resources around you and build your own enail of course. Now that we are a couple of dappy habbers we thought we'd share the build in case you wanted to $ave that money too!

What you need

The electronics are fairly straightforward and you'll likely need at least 12V at 3.5 amps to reach 650+ degrees depending on your nail and heater wire. We used a titanium nail and removed a couple of the inner rings to make room for heater wire and the K type thermocouple.

The titanium nail was wrapped with used heater wire from an old 3D printer hot end on the second revision. Our first attempt involved cementing in the thermocouple then wrapping nichrome wire around the cement and then cementing a shell around that. While the first attempt worked it took a while to reach temperature with only 3 full windings or about 6 ohms. The second and final revision was much easier to put together and since the old hot end heater wire was insulated it holds the thermocouple and didn't require wrapping around a layer of cement.

1 / 2 • Version 2 - Made from recycled hotend parts

Now it was kinda difficult to figure out what cement or material to use to hold this thing together. In the end we Uber-ed our way to the hardware store for some quick setting cement because it didn't list a temperature limit, it was a few dollars, and it was moldable. Perhaps you know of a better option?

The end result reaches 650+ in 4 minutes! Not too bad.

With only 3.7 amps, you'll hit 650f in about 4 minutes. If you use something like an old xBox power supply, it heats up nearly instantly. The programming is bare bones minimum and if you are brave enough to try this at home, perhaps think about an auto-off feature or disabling the power when the temperature readings don't make sense. Be careful. Be mad scientists!

Dappy Habbin!

-Brain

Code

Dappy Habber v0.1

#include "max6675.h"

const int thermoDO = 11;
const int thermoCS = 10;
const int thermoCLK = 13;

MAX6675 thermocouple(thermoCLK, thermoCS, thermoDO);

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F, 20, 4);

const int outputRelayPin = 3;
const int rotationKnobPin = 1;

const int minTemp = 60;
const int maxTemp = 700;

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

  pinMode( rotationKnobPin, INPUT );
  pinMode( outputRelayPin, OUTPUT );

  lcd.begin();
  lcd.backlight();
  lcd.print("Dappy Habber v0.1");
  
  Serial.println("Dappy Habber Ready");
  // wait for MAX chip to stabilize
  delay(500);
}

void loop() 
{
  double currentTemp = thermocouple.readFahrenheit();
  int rotationKnobValue = analogRead( rotationKnobPin );
  double setPoint = (double)map( rotationKnobValue, 0, 1023, minTemp, maxTemp );

  if ( currentTemp < setPoint )
  {
    digitalWrite( outputRelayPin, HIGH ); //Turn on heater
  }
  else
  {
    digitalWrite( outputRelayPin, LOW ); //Turn off heater
  }

  lcd.setCursor( 0, 1 );
  lcd.print( "SetPoint: " );
  lcd.print( setPoint );
  lcd.print( " " ); //Clear space after in case digit count changes

  lcd.setCursor( 0, 2 );
  lcd.print( "Temp: " );
  lcd.print( currentTemp );
  lcd.print( "  " );

  lcd.setCursor( 0, 3 );
  lcd.print( "ADC: " );
  lcd.print( rotationKnobValue );
  lcd.print( "    " );
  
  Serial.print("SetPoint = ");
  Serial.print( setPoint );
  Serial.print("F = ");
  Serial.println(currentTemp);
  
  delay(500);
}

Credits

The Brain

1 project • 5 followers

My name is Brain and I'm assisted by my sidekick Pinky. One day we will rule the world!

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Dappy Habber (Vaporizer)

Things used in this project

Hardware components

Story

Introduction

What you need

Schematics

Dappy Habber v0.1 Fritzing

Code

Dappy Habber v0.1

Credits

The Brain

Comments

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Dappy Habber (Vaporizer)

Dappy Habber (Vaporizer)

Things used in this project

Hardware components

Story

Introduction

What you need

Schematics

Dappy Habber v0.1 Fritzing

Code

Dappy Habber v0.1

Credits

The Brain

Comments

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