I created this reflow oven from a cheap Kmart toaster oven to assist me in making the development boards I sell on my website www.studentboards.dev

The brains of the reflow oven controller as an ATmega4809 which collects temperature data from a Maxim MAX31855K Thermocouple to Digital Converter. The ATmega4809 regulates the temperature of the oven though a solid state relay.