Q: Which microcontroller is used in this project?
A: A 40 pin 8051 microcontroller is used in this project.
Q: What is thyristor AC power control?
A: By using push button provided, we can control the power to the load. This can also be done with Bluetooth.
Q: Can I place motor instead of lamp?
A: Yes motor with rating, up to ¼HP 230V AC, can be placed instead on lamp.
Q: How is the bulb intensity varied?
A: The bulb intensity can be varied by delaying the firing angle of Thyristor, so as to control its triggering.
Q: What are the thyristors used?
A: 2 back to back connected SCRs are used as thyristors.
Q: Why SCRs are preferred instead of relays?
A: SCRs are accurate timing devices compared to relays.
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.