Week 10

Title of Activity

Prepare slide presentation


Objective


Present that slide show and present to assessor.

Content/Procedure

Sample of my slide show

Introduction

Content

Result/Analysis

This slide show still lack some of information that should need to add and remove some slide that not show been present after been advice from supervisor.

Week 9

Title of Activity

Research about Relay

Objective

• Introduction how relay work
• Relay construction
• Relay application 

Content/Procedure

Introduction

A relay is a simple electromechanical switch made up of an electromagnet and a set of contacts. Relays are found hidden in all sorts of devices. In fact, some of the first computers ever built used relays to implement Boolean gate

Construction

Relays consist from four parts :

• Electromagnet
• Armature that can be attracted by the electromagnet
• Spring
• Set of electrical contacts

Below is show simple how relay works

Relay Turn Off

Relay Turn On

  In this figure, you can see that a relay consists of two separate and completely independent circuits. The first is at the bottom and drives the electromagnet In this circuit, a switch is controlling power to the electromagnet. When the switch is on, the electromagnet is on, and it attracts the armature (blue). The armature is acting as a switch in the second circuit. When the electromagnet is energized, the armature completes the second circuit and the light is on. When the electromagnet is not energized, the spring pulls the armature away and the circuit is not complete. In that case, the light is dark.

Application

   In general, the point of a relay is to use a small amount of power in the electromagnet coming, say, from a small dashboard switch or a low power electronic circuit to move an armature that is able to switch a much larger amount of power. Relays are quite common in home appliances where there is an electronic control turning on something like a motor or light.

Relay

Result/Analysis

In this situation relay also can to be switched, plus it  are often cascaded.

Week 8

Title of Activity

 Research pH Stamp Circuit (Sensor For Arduino)

Objective

Interface with arduino for pH sensor

Content/Procedure

    pH circuit designs that are available on the are antiquated and use a significant number of overly complex analog components. pH circuit enables the engineer to easily incorporate scientific grade pH monitoring into your embedded system using modern components and communication methods. With a wide operating voltage (2.5V to 5.5V) and a simple RS-232 communication protocol, the pH circuit is an easy to use specifically designed for modern embedded computer systems. pH circuit  is designed for both continuous and intermittent readings. After calibration, the pH probe can be immersed in a liquid and operate continuously for 12 months before recalibration is recommended.

pH Sensor For Arduino

Wiring Diagram

Wiring Connection For pH Sensor

Features

• Full range pH reading from .01 to 14.00
• Accuracy within two significant
• Single reading or continuous reading modes
• Temperature dependent or independent readings
• Simple calibration protocol
• Simple RS-232 connectivity (voltage swing 0-VCC)
• Simple instruction set consisting of only 11 commands
• Micro footprint circuitry
• Debugging LED's
• 2.5V to 5.5V operational voltage
• Low power consumption 

Result/Analysis

• Best solutions for calibration, pH probe, and even a board to connect directly to microcontroller (easy to troubleshot)
• The pH Stamp outputs data from the probe over serial, so it friendly to use.

Week 7

Title of Activity

Research about MUX/DEMUX

Objective

• Introduction to MUX/DEMUX
• Introduction to Mux/Demux 74HC4052 & Features

Content/Procedure

What is Mux/Demux

    Mux is an abbreviation for multiplexing or multiplexer is refers to the process of combining two or more inputs into a single, aggregate signal transported via a single transmission channel, or a device that performs the process. Demux, on the other hand, is an abbreviation for demultiplexing or demultiplexer, and refers to the separation of two or more previously multiplexed channels into their component parts, or a device does so.

Application

    Multiplexing and demultiplexing are used in digital electronics to allow several microchips, on which a transistor or an entire integrated circuit can be formed, to share common signal buses. The transmission medium for the signal can be any material substance such as coaxial cable, twisted pair cable, fiber optic cable, water or air capable of transmitting, or propagating, signals. Multiplexing and demultiplexing applications include local area networks, such as gigabit Ethernet and fiber optic networks, digital video applications, such as high-definition television, and high-speed, low-cost, global networks, such as those based Synchronous Optical Network and Synchronous Digital Hierarchy technologies.

Type Of Mux/Demux

Type Of Mux/Demux

Mux/Demux 74HC4052

    It hook multiple serial devices to one microcontroller, solve problem it can be. The 74HC4052 analog mux/demux is one of those parts that for microcontroller. 'Mux' means that the TX pin (X) can connect to any one of four outputs (X0, X1, X2, X3). So it can connect your micro's TX pin to four different listening devices such as the RX pins on a radio, GPS module (for configuration), data logger, serial LCD and for 'Demux' means that the signal can go the other direction as well. So if  have both a radio and a GPS unit trying to send data to  microcontroller, the 74HC4052 allows you to switch between which that you want. For example if you've got the A/B pins on the mux configured to listen to the GPS, you may miss incoming serial characters from the radio.

  It also know as 74HC4052 analog as well. This means that it can pass analog values through the IC. So you can connect four analog sensors or signals to the X0/1/2/3 pins, and have them piped into one analog pin. This allows you to connect 8 analog devices using up 2 digital pins and 2 analog pins.

Pin for Mux/Demux 74C4052

Features:

• Large VCC range: 2V to 10V
• Connect one TX source to four RX receivers
• Connect one RX receiver to four TX sources
• Works both with digital and analog signals
• Output drives up to 20mA

For more information for Mux/Demux 74C44052

http://www.sparkfun.com/datasheets/Components/General/74HC4052.pdf

Result/Analysis

• Switch quickly enough between the options.
• Switch connects multiple inputs to multiple outputs depending on the user selection.

Week 6

Title of Activity

 Research about Arduino (Software)

Objective

Interface with arduino using program such as C++

Content/Procedure

The Arduino IDE is a cross platform developer tool written in Java. It allows you to control all of the software functions of your Arduino.

Each program that write is called a sketch and is compiled and uploaded to your Arduino using the IDE. A lot of sketches are freely available online and the IDE even comes with a plethora of examples to get started with just about every function your Arduino is capable of.

Eclipse and Notepad++ are popular alternatives to writing your sketches, but they lack easy access to sketch examples and compiling/uploading the finished sketch to the Arduino.

Result/Analysis

Learn how to write the program to arduino using the Arduino 0022 starting with the basic coding program such as C++.