WEEK 10- FYP 2

26/4/2017

Activity: 1. Find new driver for stepper motor.
         

Objective: 1. To find the suitable driver that can drive motor with high current and power.
               

Procedure:
Do some researches about the MOSFET. The Metal Oxide Semiconductor Field Effect Transistor (MOSFET, MOS-FET) is a type of field effect transistor (FET). It has an insulated gated, whose voltage determines the conductivity of the device. MOSFET provides high current and high speed for efficient switching conversion in ac-to-dc and isolated dc-to-dc converters. The MOSFET will provide enough voltages to fully turn on in the very short time. besides that, MOSFET has low impedance as low as 7 ohm.

Results/analysis:

Based on the researches about MOSFET, it can be divided into two types; Depletion mode and Enhancement mode. 

DEPLETION MODE- where is zero voltage on the gate terminal, the channel shows its maximum conductance. The channel conductivity is decreases as thevoltage on the gate is negative orpositive.

Figure 1: Depletion mode

ENHANCEMENT MODE- where there is no voltage on the gate terminal the device does not conduct. Mpre volatge applied on the gate terminal,the device has good conductivity.

Figure 2 : Enhancement mode

WEEK 9-FYP 2

19/4/2017

Activity: 1. Update the blog
                2.  Continue trobuleshoot the motor circuit

Objective: 1. Update and make some correction in certain part of this blog
                   2. To test the functionality of the circuit



Procedure:
                  1. Correcting the connection of wire leads but the IC driver become hot.
                  2. The input supply voltage of stepper motor is 12V and the common voltage (pin 16) for L293D is 5V. You can refer the pinout of the L293D as figure below

Figure 1: The pin out of L293D

Results/analysis
The maximum output current of L293D is 600mA but the current motor is 1.5A.
The L293D cannot drive the motor because the motor has high current which is 1.5A. The L293D is not suitable for this stepper motor that has been use in this project.

Conclusions
A new driver should be find to replace the driver. The new driver must have higher current to driver the motor. If the driver is low current, so that the motor can't move because it has not enough power to moves.

WEEK 8-FYP2

12/4/2017

Activity: 1.Construct the circuit on the breadboard to testing the stepper motor interface with driver
                2. Write the coding for motor and troubleshoot the error during writing the coding


Objective:  1. To ensure the motor is functioning well and can interface with the microcontroller
                    2. To write the coding for the motor movement using Keil UVision

Procedure :

                     1. Construct the simple circuit on the bread board
                     2. Compile the coding and burn it into the AT89S52 chip
                     

The video above shows the testing of the stepper motor with L293D . The movement of motor is back and forth.

 Results/analysis: 

 The motor movement is back and forth because of the wrong leads connections. If the leads between A1, A2,B1 and B2 is wrongly placed, the stepper motor is not move sequence as follow by the coding that has been setup.

 Conclusions:
Troubleshoot the coding and check the right leads for A1,A2, B1 and B2

WEEK 7-FYP2

7/4/17

Activity: 3rd briefing of FYP2

Objective: Briefing is focusing on workshop for Methodology and Results & Discussion Writing for FYP Report presented by Dr. Kanendra Naidu.

Procedure:
                      1. Dr Kanendra Naidu give a workshop about how do the methodology, results and      discussions in the right way.
                      2. The briefing start at 3pm-5pm at TTL1
                     


Analysis/Results:

1. The methodology consists of: 

• introduction
• schematic diagram
• block diagram
• flow chart
• pseucode
• simulation block diagram
• verification

    2. The results and discussion based on our result. 

Conclusion:

Get the clearer view how to do the better results and discussions