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Smd oven reflow2/1/2024 From there I was able to access the wiring inside of the oven. I then turned the oven upside down and removed screws from the bottom of the side panel. I had to first remove screws around the front panel. There was a lot of open space so I decided to conceal all or most of these components inside the oven.ĭepending on which toaster oven you have the tear down process may be variable. All of these peripheral components can easily be controlled by an Arduino. An OLED screen would be able to display real time data including the current temperature. A temperature probe or thermocouple could be fed inside of the oven to monitor the temperature. I realized that a stepper motor could be used to turn the dial. The wiring inside and to both of the dials was pretty unfamiliar to me so I decided it was going to be easier to work around what was already in place. This particular toaster oven has a temperature control dial and a timer control dial. The first step was to take apart the toaster oven and have a look inside. ![]() The ultimate goal is to load the oven with PCBs and components, press a single button, and have all of the components soldered without any outside adjustments or monitoring. All of this will be controlled by an arduino and displayed on an OLED screen. Once the oven reaches a maximum temperature (melting point of the solder), the temperature dial will rotate backwards to reduce the temperature in the oven. I will attempt to mimic a specific reflow profile based on the solder paste I am using. My plan was to use a stepper motor to rotate the temperature dial in a programmed way that will slowly escalate the temperature to melt the solder paste. My goal was to create an automatic reflow oven from a $20 toaster oven. Professional reflow ovens can be expensive especially if they are used on an occasional basis. They work by cycling through a temperature profile that provides a consistent escalation in temperature which melts the solder paste underneath the surface mount components. Reflow ovens provide a method that makes SMD soldering significantly easier. As such, utilizing surface mount components enable a more compact PCB design but is much more difficult to solder by hand. Circuit boards that contain only through-hole components are easy to solder but the size of the board is ultimately limited by the component's size. ![]() Hobbyist PCB making has become much more accessible.
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