This repository is for a DiY Drum coffe raoster.
(photo)
The project I want to make is beginning with a very simple structure of Software and Hardware.
It is a PID control Temp of a grill ( rotisserie), that I have transformed it into a basic coffe-roaster.
It has a metal mesh drum, which is rotated by a 220VAC electric motor (15rot/min)
The heat is provided by 4 resitences,600W each, the value of two of them is controled,with a SSR connected at a PWM output of the Arduino.
(photo)
The temperature is measured with a K type thermocouple, and a Max6675 shield connected at a analog input of the Arduino.
(photo)
I have only one sensor for the moment, just for the IT (Internal Temperature), but it will be a BT( Bean Temperature) in the future too.
No forced ventilation for the moment, but it will be.
The electric motor will be a variable speed controled