Ben's Home-Brew Solder Reflow Oven 2.0 Episode -- Episode 116

Its basically an Arduino Uno, you could just use an Uno.  You can get an idea of how things were wired by looking at the code, it has callouts for all the pins.  Sorry, there is no schematic currently unless Ben has done one since.

hey in this file all I see is the code to run it.  I would like to see the avr board schematics "or where to get it" that he uses.  this is my first mod and would like to make sure I get everything right.  thank you

Hi- You can see the details available for this show on Ben's blog-

Episode 116 Project Files

Where can I find the list of used components and the schematics?

I'm not sure, but I bet most IC sensors wouldn't work well inside an oven, too hot.

As for the Thermocouple, you don't need the translation IC, you could just use an Op-amp and math if you know the specs of your thermocouple.

Thanks for this tutorial, this is on my list of future projects to build

For the Thermocouple vs Thermistor discussion aren't there other options that could have been used to test the temp? An IC sensor for example, seems like it would be less expensive, thanks

For anyone building at home and modifying the profiles

int profiles = 0;

 

 

int profile[4][6] = {

  {

    75,140,45,125,205,20                                    }

  ,

  {

    75,140,45,125,205,20                                    }

  ,

  {

    75,140,45,125,205,20                                    }

  ,

  {

    75,140,45,125,205,20                                    }

};

 

 

String profileNames[4] = {

  "Ol' Fashioned Pb", "New Fangled RoHS", "Profile 3       ", "Profile 4       "

};

the format of the profiles is {Ramp 1 0-255, 1st target temp, hold seconds at 1st target, Ramp 2, 2nd target temp, hold seconds at 2nd target} 

Ramp rate is kind of a misnomer, its just the analog write value but because our relay is a zero cross and we aren't accounting for the cross, it doesn't exactly work as good as a PWM value would.

The ROHS profile definitely needs changing, probably a 220 target.  Your results may vary but you will definitely have to tweak for your own oven and possibly it could change depending on your board as well.

Great tutorial on building an inexpensive reflow oven.

I also liked your little debug exercise.

DAB

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