Here is a great video where a guy takes a $20 toaster oven and turns it into a solder reflow oven. He makes a great effort to integrate the electronics into the unit itself. <br>
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<a href="https://www.youtube.com/watch?v=rZyP5G4Wfm0">https://www.youtube.com/watch?v=rZyP5G4Wfm0</a>