Learning Outcomes
- Define an embedded system.
- Explain the Sense → Process → Actuate cycle.
- Identify common sensors and actuators.
- Create a model of an embedded system.
Definition
An embedded system is a dedicated computer system built into a larger mechanical or electrical system to perform a specific function.
The Embedded System Cycle
SENSE
➜
PROCESS
➜
ACTUATE
Examples of Embedded Systems
| Device | Function |
|---|---|
| Microwave Oven | Controls cooking time and power |
| Washing Machine | Controls wash cycles |
| Car | Controls braking, airbags, fuel injection |
| Printer | Controls printing operations |
Common Sensors
| Sensor | Purpose |
|---|---|
| Temperature Sensor | Measures heat |
| Motion Sensor | Detects movement |
| Light Sensor | Detects brightness |
| Touch Sensor | Detects contact |
Common Actuators
| Actuator | Purpose |
|---|---|
| Motor | Creates movement |
| Speaker | Produces sound |
| LED | Produces light |
| Pump | Moves liquid |
Student Activity
Draw a model of an embedded system such as an automatic door, smart street light, or security alarm. Label the Sensor, Processor, and Actuator.