Here’s some info on a pretty cool homebrew “Reflow Soldering Oven” that can be used for components and solder pads that are too small to solder with a conventional iron. This oven uses a controller based on an ATmega32 microcontroller and has an ADC input to read an NTC temperature sensor. The current temperature of the oven is read out on a graphical LCD screen as well.

Reflow Soldering Oven controller with graphical LCD Display