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#Prototype reflow oven code#
The VHDL code that drives this oven is linked in the writeup, and has some interesting bits for those looking to experiment with FPGAs. To control the heater, a 40A solid state relay is used. This device provides amplification, cold junction compensation, and analog to digital conversion which spits out the temperature over SPI. The oven uses a MAX31855 to read temperature from a thermocouple. It implements a state machine that meets the reflow profile of the solder paste, ensuring SMD components are soldered properly. This build uses the Papilo One FPGA development board as a controller. Most of those projects use a microcontroller to do closed loop control, sensing the temperature and toggling the heating element to hit a set point. We’ve seen plenty of reflow oven builds in the past.
Later that day, he tore it apart and built this FPGA controlled reflow oven.
For Christmas, ’s wife gave him a mini-oven.
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