Q: What is auto intensity control?
A: Automatically controlling the intensity of street light according to the peak traffic hours in the night time and completely getting switched off at the day time based on time control is known as auto intensity control.
Q: Which kind of street light is used in this project?
A: A string of white LEDs are used as street lights and also white LEDs are better than the conventional HID lamps used as street lights.
Q: What is the family of microcontroller used?
A: Here a 40 pin microcontroller from 8051 family is used.
Q: What is the concept used in this project?
A: PWM technique is used in this project.
Q: Can this concept be extended with a solar panel?
Q: What is the function of MOSFET in this project? Can we use BJT instead of MOSFET?
A: Here, MOSFET is used as a switch. BJT can be used, but that needs drive current and not voltage as required for MOSFET.
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.