Q: Which microcontroller is used in this project?
A: A 40 pin microcontroller from 8051 family is used in this project.
Q: What is programmable sequential switching?
A: This project is designed to switch on the loads sequentially upon programmable time intervals
Q: What are the modes in this project?
A: There are 3 modes- Automatic mode (Switching loads for programmed time period), Manual mode (manually switching loads) and Set mode (manually setting the load switching time).
Q: Can we place a direct load other than the lamp?
A: Yes, one can place a direct load, but up to 200W .
Q: How are the loads operated?
A: The loads are operated using push buttons for each mode. For detailed explanation, refer the operation procedure given with the kit.
Q: Can I Have the Ladder Diagram for this circuit?
A: Ladder diagram is meant for PLC and this project doesn't use PLC but microcontroller in C program.
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.
Q: What to do when the lamp fails and what is the maximum lamp rating that can be used?
A: If the lamp fails one can use any lamp or bulb which is used in homes up to 100W. We suggest you to go for low watt bulbs.