FYP2 WEEK 3 (2)

Title : Briefing

- Briefing conducted in TTL 2 at 3 pm

- The briefing is about to give some explanation for the students who are taking the final project for Diploma and Degree programmes. The briefing is about:

·         Introduction

·         Objectives

·         Credits and duration

·         Scope of projects

·         Title selection

·         Project Assessment

·         Presentation day

·         Submission date of project

FYP2 WEEK 3 (1)

Title :Testing circuits and design the PCB Layout

- Testing each circuit on breadboard to make sure the circuit is functioning well.

- After each circuit has been tested, Dip-Trace Software is used in this project for designing the PCB Layout

PIC 16F877A

Relay 12 Volts

FYP2 WEEK 2 (2)

Title :Find the right component and tools for the project

-Buy the component at NIXIE ELECTRONICS SHOP inJalanPasar by referring to each of schematics circuit.

- Buy some tools that are used to make the project like soldering iron, drill, copper board and sand paper.

List of components needed for Relay Circuit

• ·         Relay 12 Volt
• ·         Transistor NPN 2222
• ·         Resistor 1kΩ (x2 unit)
• ·         Diode

List of components needed for PIC circuit

• ·         40-Pin IC socket
• ·         PIC 16F877A
• ·         Resistor 1kΩ (x2 unit)
• ·         Oscillator 20 MHz (crystal)
• ·         Capacitor 18pf (x2 unit)
• ·         LED
• ·         Capacitor 0.1µf (x2 unit)
• ·         LM 7805 (voltage regulator)

List of components needed for Bluetooth circuit

• ·         Bluetooth Module (HC-05)
• ·         LM1117T (voltage regulator)
• ·         Capacitor 100nf (x2 unit)
•       Other components and tools
• ·         Pin header
• ·         Pin header connector
• ·         Adaptor 12V (x2 unit)
• ·         Solenoid 12V
• ·         Jumper wire

FYP2 WEEK 2 (1)

Title :Research and findings (LM 1117T – Voltage Regulator)

ANALYSIS

Schematic diagram that will be used in the project

\

FYP2 WEEK1 (2)

Title : Research and findings(relay DPDT-Double Pole Double Throw)

- Buy the components of relay DPDT and relay base socket in JalanPasar.

-Most relays are designed for PCB mounting but we can solder wires directly to the pins provided. For this situation, we must be careful to avoid melting the plastic case of the relay.

DPDT

- Double Pole Double Throw. These have two rows of change-over terminals. Equivalent to two SPDT switches or relays actuated by a single coil. In total, eight terminals when the coil is also included.

FYP2 WEEK 1 (1)

Title :Research about the relay DPDT (Double Pole Double Throw)

ANALYSIS

- For this project, relay DPDT will be used as a backup if there is any power failure.

- Power failure means there is no power supply. There is an alternative way that I can use by using battery of 12 volt. Therefore, this project will be added one more relay of DPDT as a function to replace power supply.

Terminal Pins

A Double Pole Double Throw Relay comes with 8 terminal points.

The terminals are COIL, COIL, COM, COM, NO, NO, NC, NC.

Terminal Descriptions

COIL- This the is the COIL terminal. These are the terminals where you apply voltage to in order to give power to the coils (which then will close the switch). Polarity does not matter. One side gets positive voltage and the other side gets negative voltage. It doesn't matter which order. Polarity only matters if a diode is used.

NO- This is Normally Open switch. This is the terminal where you connect the device that you want the relay to power, when the relay is powered, meaning when the COIL receives sufficient voltage. The device connected to NO will be off when the relay has no power and will turn on when the relay receives power.

NC- This is the Normally Closed Switch. This is the terminal where you connect the device that you want powered when the relay receives no power. The device connected to NC will be on when the relay has no power and will turn off when the relay receives power.

COM- This is the common of the relay. If the relay is powered and the switch is closed, COM and NO have continuity. If the relay isn't powered and the switch is open, COM and NC have continuity. This is the terminal of the relay where you connect the first part of your circuit to.

WEEK 14

Title :  DISCUSSION WITH TECHNICIAN ABOUT RELAY CIRCUIT 

For this week i has meet with technician and ask him about the relay connection, he give some advice about the connection and after discussion with him, i design the circuit of relay that suitable to use in my project.

Figure above show that my relay circuit after make some editing and correction about symbol and also proper design