Progress Project

WEEK 1 DATE 9/9/2013 – 13/9/2013

Selecting a compatible circuit

During the last semester, an Engineering Design subject purposes for to teach us on how to be ready for the upcoming Final Year Project. During the duration taking the subject we decided to select the tittle of our project and that is Automatic Pet Feeder. the purposes for our diploma subject is to study and research on the project that been select.     

Picture 1

In the Picture 1 shows the circuit that we selected for our project when taking the Engineering Design last semester. The reason that this circuit is suitable with our project is because it has a display of the time and also a setting alarm system that can be set suitable for the automatic system for the pet feeder. This is originally based on the Elektor Magazine that tittle for Digital Alarm Clock. Thus this circuit from the www.nurhazwaniramli.blogspot.com  improved by adding a relay. The relay will act as switch to turn on a 12 DC motor to flow out the pet food.

Component used

COMPONENT	QUANTITIES	VALUES
10K RESISTOR	10	RM0.50
2.2K RESISTOR	1	RM 0.05
1K RESISTOR	2	RM 0.10
220 RESISTOR	32	RM 1.60
5.5K RESISTOR	1	RM 0.05
TOTAL		RM 2.25

  

Component	Quantities	value
100nF capacitor	7	RM 1.40
22pF capacitor	2	RM 0.40
1uF capacitor	1	RM 0.20
LED	3	RM 0.60
IN4148 diode	1	RM 0.10
IN4007 diode	2	RM 0.20
transistor C547	1	RM 0.40
Crystal	1	RM 3.30
Total		RM 6.60

Component	Quantities	value
Switch	1	RM 1.70
Button Switch	5	RM 5.00
PIC16F84  Microcontroller	1	RM 10.60
RELAY - SPDT	1	RM 3.50
Voltage Regulator 7805	1	RM 0.80
74HCT164  Encoder	4	RM 5.20
7 segment	4	RM 5.60
5V buzzer	1	RM 3.00
12 dc stepper motor	1	RM 17.00
12 DC Adapter	1	RM 17.00
Tools, casing and container pet feeder		RM 60.00
TOTAL		RM 112.40

Figure 2

Figure 2 shows an Alarm clock circuit. The user uses the Arduino Uno as its controlled system for the circuit.   Using and Arduino Uno controller to controller the timer and using the RTC clock module for a smoothing producing output at the 7 segment.

Advantages:  using an Arduino Uno for using the open source Code: - Referrer at the www.arduino.cc for more information. Also using a 7segment 4 digit for conserving spaces at the strip board

Disadvantages: The circuit does not use any type of motor and specifically function only as an Alarm Clock.

Resource: http://blog.afkham.org

Week 2 date 16/9/2013 – 20/9/2013

  Deciding and improving the circuit.

          After meeting with our adviser and having discussion of our project, we decided to choose the circuit from the figure 2. Why..?

Ø  Because using the Arduino Uno will make us easier to do the code programming for the alarm clock system.

Ø  Because our supervisor recommended by the lecturer to use the Arduino so that to develop and study more on new components and suitable in the modern era.

Ø  To AVOID any damages on all the component that been use in the circuit

Ø  The circuit also makes it look like it’s not using a large space on the design structure and making the project lighter.

         The improvement in this circuit is, since the circuit doesn’t have a motor to drop of the food, we added the circuit with a stepper motor so that is compatible with our objective for this project. The arduino that we will be using is the latest model of arduino uno R3. The arduino R3 specification is much more

   

Problem Statement

         When studying the circuit from the figure 2, the problem that we encounter is that all the PWM pins on the arduino uno have been used for driving the IC 74HC595 for the output 7- segment 4digit.

Week 3 & week 4  23/10/2013 – 4/10/2013

Components and programming

Component

           Finally we decided to build and test everything on strip boards, the main reason that we build it on the strip board is that we can identified the place where we can punt the stepper motor position. 

1.       Arduino

2.       4 digit 7 segment display

3.       74HC595 shift register

4.       DHT11 temperature sensor module

5.       RTC clock module

6.       Resistors

7.       BC547 transistor

8.       Piezo buzzer

9.       104 (100nF) ceramic capacitor

10.   Tactile switches 

 After our advisor approved with our explanation on the circuit testing we decided to buy our component at our best electric and electronic market the Jalan Pasar, pudu.

Picture 3,4 and 5 show that the session of buying the required component at the Jalan Pasar

The next day we start to follow and construct the circuit on the based on the figure 2. It took us 2 hour to complete the circuit 

 Figure 7

  Figure show the complete alarm clock circuit

The Briefing

     The briefing was to guide and the procedure during the presentation day at the industrial day. The briefing also give us the on the important details that we inform on the industrial day.