29 Dec '13, 6am

A FPGA Controlled Reflow Oven

A FPGA Controlled Reflow Oven

For Christmas, [Hamster]‘s wife gave him a mini-oven. Later that day, he tore it apart and built this FPGA controlled reflow oven . We’ve seen plenty of reflow oven builds in the past. 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. This build uses the Papilo One FPGA development board as a controller. It implements a state machine that meets the reflow profile of the solder paste, ensuring SMD components are soldered properly. The oven uses a MAX31855 to read temperature from a thermocouple. This device provides amplification, cold junction compensation, and analog to digital conversion which spits out the temperature over SPI. To control the heater, a 40A solid state relay is used. The VHDL code that drives this oven is linked in the writeup, and has some interesting bits...

Full article: http://hackaday.com/2013/12/28/a-fpga-controlled-reflow-o...

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Fubarino Contest: FPGA Pong

Fubarino Contest: FPGA Pong

hackaday.com 26 Dec '13, 9pm

For [Eric]‘s entry for our Fubarino Contest, he went down to very low-level hardware and created Pong on an FPGA. [Eric] u...