Building a Reflow Oven

Table of Contents
💡 Introduction #
I noticed a limited availability of well-functioning reflow ovens for home soldering. These ovens often lack essential features, such as the ability to save multiple solder profiles for various types of solder paste. This sparked the idea of creating an open-source, easy-to-build oven.
📃 Prerequisites #
For the reflow oven you need obvousliy multiple hardware to be used for the build. It is also for advantagous to have an soldering iron and other tools to help for the build.
There is the list of the BOM of the used components.
Part Name | Quantity | Source 1 | Source 2 | Price |
---|---|---|---|---|
Pizza Oven | 1 | amazon | 42€ | |
Wemos D1 ESP32 | 1 | ebay | 8€ | |
MAX6675 | 1 | ebay | 7€ | |
Voltage shifter | 1 | ebay | aliexpress | 5€ |
Nextion 3.5" 480x320 HMI | 1 | ebay | aliexpress | 44€ |
SSR-25DA Solid State Module | 1 | ebay | aliexpress | 7€ |
Main Switch | 1 | ebay | 5€ | |
Breadboard board | 1 | ebay | ca 5€ | |
Pin headers male x20 | 1 | no specific shop | ca. 2€ | |
Pin headers female x6 | 2 | no specific shop | ca 2€ | |
Cables | multiple | hardware store | ca. 10€ | |
Screws | multiple | hardware store | ca. 2€ |
For the cables/screws there is not exacly a BOM. But you need three wires for the AC and some wires for DC voltage. Also the Pin headers you can buy multiple ones - because trust me you need more :)
🔧 Build #
For the build you can use the following schematic to construct your specifc PCB using the breadboard. The schematic is drawn in Fritzing but can also be designed using KiCad or other PCB designer.
The result after solding the pcb is following:
You can feel free and build your PCB like you want. You don’t need to follow my provided pictures, because everyone build their pcb different.
After the soldering and building the PCB you have to print a cover for the front panel.
Therefore a 3d printer would be a advantage :D
You can also build that cover with a plastic cover and saw/drill the holes on your own. But the cover would be of course a better fit.