Small scale Embedded system : Some of the examples of small scale embedded applications:

1. Automatic Chocolate Vending Machine : This is a system that dispenses chocolates automatically. The system will require a microcontroller to control the system. A display will be required to display various messages for the customer. A mechanism will be required to accept the coins or notes and analyze the same to list their value. Based on the value a decision is to be taken to dispense the chocolate and return the extra money if any. Thus the various tasks that are to be controlled by the microcontroller are not very complicated, hence a small scale system can easily implement this system.

2. Stepper motor controllers for a robotic arm controller : A robotic arm controller is a mechanism that is used to perform various movements like that of a human arm and do a particular operation mainly pick-and-place for an object. The stepper motor requires a special sequence of binary data to move in a particular direction. This 4-bit binary data can be given from the port of a microcontroller. There may be multiple stepper motors to implement various joints of the robotic arm. This can again be implemented easily by a small scale embedded system.

There can be various other small scale systems like digital multi-meter to measure voltage. Current and resistance. Small toys. Computer peripheral controllers. TV remote, power windows in vehicles. Electronic instruments such as temperature controller etc. are also examples of small scale embedded system.

Medium Scale Embedded Systems :

Some of the examples of medium scale embedded systems:

1. Router : A networking router used in a multi-computer system is a medium scale embedded system. It requires proper routing algorithm to be implemented. The protocol is to be implemented to have synchronization for communication. Various ports are required to interface the different computers in the multi-computer system.

2. Music system : Implementation of a music system that can play various format of songs is also a medium scale embedded system. The codec (i.e Coder and decoder) of these format is to be implemented, which is a complicated task and requires a lot of algorithm development and programming. Hardware need to be fast enough and hence it requires high end microcontrollers or DSPs.

3. Sophisticated Embedded Systems

Some of the examples of sophisticated embedded systems are :

1. Washing Machine
2. Digital Camera
3. Power windows of a vehicle
4. Power steering of a vehicle
5. Fuel injection system of a vehicle
6. Air conditioner 7 Smartphone
7. Music Player
8. Automatic Temperature controller
9. MODEM
10. Mouse
11. Keyboard controller
12. LAN card
13. Printer
14. Scanner
15. Router
16. Digital rolling display for advertisements
17. Digital watch
18. Digital Locker
19. Set top box and many others.