FYP 2 (WEEK 6)

WEEK 6


Title of Activity

• Design RS232 connection for PCB layout
• Combination of GSM and PIC circuit

Objective

• To combine the GSM modem with the PIC circuit

Content / Procedure

Front view of RS 232 connector

Back view of RS 232 connector

Overall view for RS232

Combination between GSM and PIC 16F877A circuit

• GSM allowed for a more optimal allocation of the radio spectrum, which therefore allows for a larger number of subscribers.
• Currently there are several bands in use in GSM. 450 MHz, 850 MHZ, 900 MHz, 1800 MHz, and 1900 MHz are the most common ones.
• GSM allows for use of duplex operation.
• Although GSM operates in duplex (separate frequencies for transmit and receive), the mobile station does not transmit and receive at the same time. 
• A switch is used to toggle the antenna between the transmitter and receiver.

Advantages GSM

• GSM uses radio frequencies efficiently, and due to the digital radio path, the system tolerates more inter cell disturbances.
• The average speech quality is better than in analogue system.
• Data transmission is supported throughout the GSM system.

Conclusion

What we can conclude here is the GSM are one of the alternative medium that can be used in order to invent something new.In addition,the technology of the GSM can reduce the percentage of the accident among the drivers.For example,when accident occur  this eye blink detector will detect the drivers eye and in 5 seconds then the GSM will automatically send sms to the number that have been set by the user.