Witura WT-9001 IP65 Dokumentacja Pobierz pdf (Strona 63)

5.2 Project Problem

There are some problems in making the hardware architecture. The main

problem encountered is the GSM antenna. GSM antenna is the last part on GSM modem

to received and transmitted signal from outside. Green light LED will flash at the GSM

modem with an interval 5 seconds means the GSM modem in standby-by to continue the

process. Connection to antenna is often interrupted. So, should the cable end is punched

a little further into the GSM antenna.

The second problem is about voltage regulator. The input supplied is 12V want

to reduce the voltage until 5V for support a get logic circuit. For the first time using only

two component voltage regulator which is 7809 and 7805. But after running this both

component become heated. This problem can be settle after adding two component

voltage regulator which is 7812, 7809, 7806 and 7805.

The third problems are the difficulties to burn the programming into the

controller. This is because the problem of cable that interface the controller to pc. The

cable is too sensitive and to burn the cable it is need to hold the cable until the burn

process finished. The second problems that occurs during the same problems from the

cable is the data that transmit and received during the burn process is not same, so the

process need to try until the transmit signal be the same as received.

5.3 Recommendation and Suggestion of future Work

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Witura WT-9001 IP65 Dokumentacja Strona 63