ABAC Embedded Systems and Hardware Interfaces Questions

1. Compare the 3 communication protocols SPI, I2C and UART with respect to their:a. Speedb. Number of connections needed to support communicationsc. Ability to support full?duplex vs half?duplex communicationsd. Ability to connect more devices to the communication system

2. Explain how a Brushed DC motor works with the help of a diagram

3. Determine the best type of motor (servo, DC or stepper motor) for each of the followingapplications:a. Printerb. RC Plane flapc. Cooling fand. Scannere. Robotic arm

4. What is the purpose of soldering a capacitor between the two terminals of a DC motor?

5. What is the purpose of a flyback diode connected in parallel to a DC motor?

6. Explain how an H?bridge works in controlling the direction of a DC motor

7. What is the concept called “stall torque”?

8. What are 3 problems associated with brushed DC motors?

9. How are outrunner motors physically different from inrunner motors?

10. What is the relationship between the speed of a DC motor and how much voltage is needed todrive the motor?