Okay guys nice work so far..
First thanks God I know arduino and i can work. I also know about little electronics...

Now my plan,
1- Make a standalone Controller board with ATMEGA 328P-PU chip installed
2- Using 3-wire LCD and 5-keys keypad (DIY)
3- The parameters can be changed with Menu driven interface

Further i am living in a part of world where we have 220VAC so needs help..How can we use BT139 with 220VAC?