So why i used the potentiometers? Because the all the 14 LDR's in my hand provided me different readings in dark and extreme light conditions. Only two LDR's matched together and for the rest i was getting the calculated resistors values 2.5K and 2.8K which are not standard values resistors. So i came up with potentiometers where i can adjust them to get the precise resistance. Now all the LDR's can be matched with these variable resistances and the sensor will give me perfect results. I will lock the pots once adjusted.
Now by change in microcontroller programming i shifted the timing interval control from the firmware to the hardware. Now the user can select the sense/react timing of the sensor with a single potentiometer and can change the movement of panels from real time up-to 15minuts delay. Real time means the panel sensor continuously track the sun and command the motor to move. I will set this for 10minutes for myself i.e. After each 10minutes the tracking sensor will start to move the panel toward the sun.