Preliminary Design Report
12
Control Unit
The control unit consists of the microprocessor, memory and sensors. The control unit
controls and monitors the dispensing process. It gathers information about the container weights
from the sensors, sends information to and retrieves information from the user interface, and
signals the motors to turn on or off. The level 2 block diagram for the control unit is shown in
Fig. 4.
Figure 4: Level 2 Functional Block Diagram for Control Unit
