Andy
Although usually left to the professionals, coffee roasting can be done at home in a hot air popcorn popper. But it is very important to note that not all air popcorn poppers are suitable for home roasting.
Before you go ahead and roast your coffee beans, check that your popcorn popper does not have a grate at the bottom but has side vents where the hot air enters. If coffee chaff accumulates in the bottom...