I did some experiments with a thermocouple in the beans and a PID controller which ends up cycling power on for 4 seconds and off for about 6 seconds, so being lazy decided the temp control is not that important so long as it does not go crazy at the beginning. Found that with PID control with no ramp I still needed to bring the temperature up in a few stages anyway.
So with all that in mind I made a little triac controller with a PIC10F220 that simply turns the power on for 4 seconds, off for 6. I can add temp control etc later or a cutoff timer but for my needs suspect it is not required.
Takes around 9:30 for a medium roast and 12:30 before second crack.
So with all that in mind I made a little triac controller with a PIC10F220 that simply turns the power on for 4 seconds, off for 6. I can add temp control etc later or a cutoff timer but for my needs suspect it is not required.
Takes around 9:30 for a medium roast and 12:30 before second crack.

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