Channel positioned TV antenna
Practical Aspects
During the testing process extensive debugging of the programming was done, as the program was considerably large identifying a failure point was one of the daunting tasks that was encountered by the group
- LED’s was used to simulate the stepper motor before connecting a stepper motor as it would enable to see the clear flow of the bits. Once the motor is stopped it was easier to determine whether the next pulse begins from that particular position.
- Due to requirement and hardware limitations accuracy of the positioning was reduced to 5o, this was done using an AND gate where the least significant bits were ignored which would allow positioning to progress more smoothly.
- The program executed large number of functions and overloaded the microcontroller processor, therefore nop function had to be given in order to give a break and process the data thereafter.
- The seven segment causes a power surge when switching on the display unit, this causes the program to reset. To overcome this problem a capacitor was connected.
- An external crystal oscillator was used rather than the existing microcontroller oscillator as it was more accurate and the required frequency could be obtained.