Q: Which microcontroller is used in this project?
A: A 40 pin 8051 microcontroller is used in this project.
Q: What are four quadrant operations?
A: Four quadrant operation of a DC motor means operating a DC motor in Forward, Reverse, Forward brake and Reverse brake.
Q: Is any speed control feature available?
A: Yes, in both the directions speed can controlled using PWM technique
Q: Can controlling of speed be done wirelessly?
Q: Is this concept achievable without microcontroller?
Q: What is the rating of the DC motor used?
A: High speed DC motor- 5 volt is used.
Q: What is the formula for calculating smoothing capacitor value?
A: There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.