system monitoring. Three LED pilot lights are fixed on the panel of the control
box. Green light indicates the system is running. Red light shows the system is
halted or stopped. Amber light symbolizes the machine is ready for angle
selecting. The potentiometer is used as an interfacing device for user to input the
desired winding angle. This is to be accomplished by turning the potentiometer
knob. Analogue output from the potentiometer is connected to the ADC pin of the
microcontroller. Final conversion of the signal is in the range from 40 to 80
degree and it is displayed on the LCD panel. Apart from that, there are push
buttons to start and stop the machine respectively