- Use a two-timer relay to control the frequency & duration of the time the burner is on.
- Use a variac to control the blower speed.
- PID controller to do a better job of determining the roast temp?
- Replace the RTD in the exhaust flow with a thermocouple probe in the bean mass.
These would eliminate the roast profiles function of the current electronics. The timer relay & PID could provide even greater fine-tuning (
almost infinitely tunable) of roast profiles - they just wouldn't be programmable.
