Q: What is GSM?
A: It stands for Global system for Mobile Communications. It is a communication standard using time division multiple access technique.
Q: At which frequency range of GSM operates in this project?
A: GSM frequency range is 900MHz
Q: How can I feed the mobile number?
A: By giving a missed call to the SIM number of the GSM interfaced to the controller, one can feed the mobile number.
Q: How is theft intimation to the owner conveyed?
A: By pressing interrupt button provided as a test button,the microcontroller conveys a theft intimation message to the owner number fed in it.
Q: How can we stop the engine remotely?
A: By sending an SMS with text “Stop”, we can stop the engine remotely.
Q: How is the engine connected to the system?
A: A lamp is used to demonstrate the mechanism required for automobile engine
Q: What is the family of microcontroller used?
A: A 40 pin microcontroller from 8051 family 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.
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.