Week 14

List of activity

Study about basic 4 android software

Objective

To make GUI for smartphone

Content

B4A includes all the features needed to quickly develop any type of Android app.
B4A is used by tens of thousands of developers from all over the world, including companies such as NASA, HP, IBM and others. B4A can run in two modes: local compilation and remote compilation. Local compilation mode is faster and has more options such as working with the emulator, USB debugging, unattended installations and others.

In my project smartpone is use to control and monitor the electrical appliances at home. B4A isoftware is use to create the GUI for smartphone. B4A use a basic language for the programming and it almost similar with the vb.net. The programming language not too easy to learn but there a lot of tutorial we can learn through internet. 

Week 13

ACTIVITY

• In week 13 focusing to complete the fyp report for chapter 1,2 and 3 

RESULT

• after discussion with supervisor my report must do a correction because the content of the report does not meet my supervisor expectation.
• a good report should be more detail and the content must be precisely and compact.

Week 12

List of activity
Study about relay circuit

Objective

To make relay circuit for this project

Content

In this week, I was research about relay operation. This is because in my project relay is used to control the output.

Relay Basics

The basics for all the relays are the same. Take a look at a 4 – pin relay shown below. There are two colours shown. The green colour represents the control circuit and the red colour represents the load circuit. A small control coil is connected onto the control circuit. A switch is connected to the load. This switch is controlled by the coil in the control circuit. Now let us take the different steps that occour in a relay.

relay operation

• Energized Relay (ON)

As shown in the circuit, the current flowing through the coils represented by pins 1 and 3 causes a magnetic field to be aroused. This magnetic field causes the closing of the pins 2 and 4. Thus the switch plays an important role in the relay working. As it is a part of the load circuit, it is used to control an electrical circuit that is connected to it. Thus, when the relay in energized the current flow will be through the pins 2 and 4.

Energized Relay (ON)

• De – Energized Relay (OFF)

As soon as the current flow stops through pins 1 and 3, the switch opens and thus the open circuit prevents the current flow through pins 2 and 4. Thus the relay becomes de-energized and thus in off position.

De-Energized Relay (OFF)

In simple, when a voltage is applied to pin 1, the electromagnet activates, causing a magnetic field to be developed, which goes on to close the pins 2 and 4 causing a closed circuit. When there is no voltage on pin 1, there will be no electromagnetic force and thus no magnetic field. Thus the switches remain open.