This is a block diagram about NXP's refrigerator and its components. As you can see from the diagram example, around the program control (MCU), there is the motor control (compressor and fan), connectivity, the user interface (display and keypad), and other components, like the thermistor, frost/moisture detector, door open sensor, and water/ice dispenser. You can create a block diagram or any engineering diagram like this with EdrawMax to sketch and present the inside of any electrical product.
