who cannot identify an appropriate course project on their own, they may consider to design and implement a circuit board for a DC motor speed control by considering
engineering
Description
For the students who cannot identify an appropriate course project on their own, they may consider to design and implement a circuit board for a DC motor speed control by considering the following: 1) Any DC motor with a reasonable load is appropriate, e.g., DC motor driven fan, DC motor driven model-scaled car. 2) The motor speed can be set and adjusted manually, and can be displayed on the board. 3) The motor speed should be controlled based on pulse width modulation (PWM). The PWM can be generated using a 555 timer with appropriate peripheral circuit design. The rotation of the motor can be reversed using H-bridge. 4) It is suggested to use an optoisolator to decouple the control signal and motor driving circuit. 5) If you have background in feedback control, it is good to implement any version of linear controller for the motor speed control. 6) You can use microcontroller only for some functions you cannot implement using your own circuits or when you want to compare the performance
