Mark IV Coffee Maker1
- Pressing the start button starts the brewing cycle
- Brewing cycle continues until all water is gone from the tank
- When the cycle is done, an indicator light comes on
- If the carafe is removed from the maker while brewing, a relief valve is
opened and the boiler heater is turned off.
- When the carafe is returned, the boiler heater is turned back on and the
relief valve is closed, and brewing continues.
- When the carafe is placed in the coffee maker and it contains coffee, a
warmer plate is turned on to keep the coffee warm.
- If the carafe is removed or becomes empty, the warmer plate is turned off.
(wiring) 1 From "Principles
of OO Design", training material from Bob Martin/Object Mentor, Used
with Permission