Ever wonder how all of those tiny chips and components can fit inside your laptop or smartphone? If you tried to squeeze them in there yourself, your laptop would quickly become too heavy for your lap, and your mobile phone would need wheels to stay mobile.
The secret to miniaturization is surface mount soldering. Surface mount soldering is peformed in a temperature controlled oven so that the components solder themselves to the circuit board. Today, we make a surface mount soldering (or reflow) oven using a regular countertop toaster oven and an Arduino.