06-04-2012, 12:10 PM
MOBILE SWITCHING CENTRE
MOBILE SWITCHING CENTRE.doc (Size: 199 KB / Downloads: 27)
INTRODUCTION:
Aim : To show Call Switching and Recharge management using micro controller.
Elements :
Together LCD, microcontroller and 2 buttons input act as one mobile equipment .
Microcontroller 4 is used as Switching microcontroller which is connected to 3 buttons input as shown in fig.
What is required:
1. When we press button 2 of microcontroller 1 there should a LCD blink of microcontroller 2 for 10 seconds . This switching is done from microcontroller 4.
Similarly the other combinations 1-3, 2-1 , 2-3 , 3-1 , 3-2
2. LCD should show BALANCE all the time.
Initially, balance=0 for all microcontroller
When we press button 1 of microcontroller 4 balance should increment by 1 i.e. now BALANCE=1 and BALANCE =2 ,3 and so on on other clicks…
Similarly for button 2 for microcontroller 2 and button 3 for microcontroller 3
3. there is no Calling when balance = 0.