It has been a while since my last post here...
The modified KOPEK AR1002 rotator is successfully installed and happily rotating my antenna whichever direction I wanted it to beam to.
The only bug that I have is on the ARDUINO based controller where occasionally, the LCD will display some garbage,,, I figure it could be due to the power supply is suffering from a minor voltage dip when the relay is powered and released. I need to check the circuitry again... when I have time..
I may also plan to replace the power supply to a much higher current is possible to avoid such issue popping out again. It also cause the USB communication to hang..