In the second class of this week, we continued our lesson from where we have stopped in the class before. To deal with the Ultiboard, we have to use the designs we have made before. The main use of the Ultiboard is to simulate the circuits, arrange the components on a board so it will look nicer and all these circuits can be transferred into 3D mode.
Ultiboard actually is an electronic Printed Circuit Board (PCB) Layout program which is part of a suite of circuit design programs, along with NI Multisim One of its major features is the Real Time Design Rule Check, a feature that was only offered on expensive work stations in the days when it was introduced.
In Ultiboard, I could design how my circuits looks like and edit the error occurs in the circuits effectively because Ultiboard will tell us where is the problem and what type of the problem occurs in the circuits. In addition, we can put our name on the board so it will make the designs more interesting.
For this week's classes, Mr Ridzuan introduced us to the two new softwares named Multisim and Ultiboard. In the first class, we were focusing only to the Multisim because Mr Ridzuan said it will take times for us to learn something new like this new software. I think most of us never heard about this software before.
Mr. Ridzuan always mentioned to us that we have to be a fast learner because actually we have no much time to cover up all of the chapters including Multisim and Ultiboard. So, he said he will be teaching the lesson as fast as possible.
Back to the main story, The Multisim, we learned the basics of this software such the components, simulations, and connections of the components. Multisim actually is an electronic schematic capture and simulation program which is part of a suite of circuit design programs, along with Ultiboard.
Mr Redzuan asked us to do some practices using this software. We first designed the same circuits like he did and finally, we had to simulate the designs wether the circuits are working and can be runned or not.
I found a few websites that have the tutorials on Multisim. Maybe it will be useful to the beginners like me. Here is the link to the website Multisim..
For today's class, Dr. Rasli took over the teaching session and replaced En. Ridzuan only for this day. He taught us a lot about the devices and system. But, I almost forgot all the information given by him as the information is new to me and by the same time, I forgot to take some notes about it.
From what I have remembered about the lesson, Dr. Rasli explained about the meaning of the devices and systems. Also, the meaning of the electronics.
There was an electronics component that I was really interested in. The name of the components was OLED. OLED stands for Organic Light Emitting Diode. For those who are the first time to hear about this..you can read the information of OLED just click here.
This week became a tough week for everyone of us, because in 25 Oct, we had our first practical test. Although the questions and tasks seemed easy for everyone but we still took time to tackle the questions, because practical test needs a full attention and carefullness to deal with it. Alhamdulillah, I think I can answer all the questions well, but not to be overconfident, I put all these to faith lastly. Insya Allah. God knows what is the best for me.
Then, in 28 Oct, we had our first oral presentationafter we went through 2 weeks discussion about our own topics. As I have mentioned in last post, my group have chosen a topic about 3-Dimensional television.
There were 7 groups total in my class. Some of groups have two and three persons. And my group was the first group to present in the front. Although, we don't have too much knowledge about this 3D tv, but i think we have given a good presentation in overall.
Apart from that, there were 3 lecturers, Dr. Rasli, En. Ridzuan and Dr. Kamal, evaluated our presentations when we were presenting in the front. Lastly, the lecturers gave us some comments and a few tips for better presentations. For advance tips you can click this link..Presentation Tips, I think this link is good for beginners in presentation like me.
By the way, this is the link for the article click me! and this link for the minutes of meeting click me too!
For this class, we were focusing to the semiconductor components again. But this time, it became more details as many information have been told by En. Ridzuan. So, i will be focusing to the transistor because I have explained about the diodes in last post, before this.
TRANSISTOR?
transistor also a semiconductor components that is made up of two diodes and is a fundamental component in almost all electronics devices. The main function of transistor is to amplify and switch electronic signals and power. It is composed of a semiconductor material with at least three terminals for connection to an external circuit.
A bipolar (junction)transistor is a three-terminal electronic device constructed of doped semiconductor material and may be used in amplifying or switching applications. Bipolar transistors are so named because their operation involves both electrons and holes. Charge flow in a this transistor is due to bidirectional diffusion of charge carriers across a junction between two regions of different charge concentrations. This mode of operation is contrasted with unipolar transistor such as field effect transistor, in which only one carrier type is involved in charge flow due to drift. By design, most of the this transistor collector current is due to the flow of charges injected from a high-concentration emitter into the base where they are minority carriers that diffuse toward the collector, and so transistor are classified as minority-carrier devices.
the BIPOLAR JUNCTION transistor
In addition, we also learnt how to deal with IC (integrated circuit), or we can called it a chip or microchip. Most interestingly, this small components is made up by thousands or millions of tiny resistors, capacitors, and transistors. So, that is mean an IC can be as amplifier, counter, etc.
Diode?,,actually diode is a type of two-terminal electric component with a nonlinear current-voltage characterisitics.A semiconductor diode, the most common type today, is a crystalline piece of semiconductor material connected to two electrical terminals. Semiconductor diodes are widely used throughout all areas of the electronics industry from electronics design through to production and repair.
Have you ever seen this before?
Diode is made in many types such as LED(Light Emitting Diode), Zener diode, Laser diode etc. But for our lesson last week, only LED and diode have been used because they are familiar diodes and can be seen in almost all stuffs.
it is familiar to you right?
En. Ridzuan added some data, diagrams and components that made it very clear to us about this diode. In overall of his class last week, we managed to learn how to calculate the value of diode using multimeter and did data collection in the form provided by lecturer.
Starting from last Tuesday, the lecture have been replaced by En. Ahmad Ridzuan bin Mohd Hanapiah. In overall of his two recent electronics classes, we were guided to learn about a few electronics components, such as transistor, diode, capacitor and resistor. Although we have already knew a little bit about such things, the information from En. Ridzuan made us clear and we gained more understanding about these components.
The tutorial that have given to us is very interesting because there are many information about the components in details. So, we don't have to worry ourselves. Thanks a lot to En. Ridzuan.
For the second class in last week, we did a lot of practices included finding the value of each components, using multimeter, and identifying the components based on the information given in the tutorial. Most interestingly, we did blowing up some components. Two capacitors became the victims in the experiment. But
please don't try this at home.
Based on the class, I understood that resistor can be measured in 2 ways. The first one is using the colour code. As the resistor are coded by using colours, we can determined the value of resistance of a resistor using the Colour Code Table (CCT).
This is what CCT looks like.
Instead of using CCT, multimeter is another way to calculate the value of the resistance. And by using this, we can get the actual value of the resistor with precision. Multimeter has many functions as it combined the function of voltmeter, ammeter, ohmmeter and capacitance meter. For the one who wants to know more about multimeter, check it out this video.
Multimeter comes in many shapes and colour, but most important is the function of the multimeter. The most common multimeter in the market now you can have are like the picture below.
Next, we moved to deal with the capacitors. For capacitors, there are two types of them. First one is non polar capacitor while the other one is absolutely polar capacitor. Capacitors that we used in this practice are the one black in colour and another one is made up by many colours.
This is non polar capacitor.
The polar capacitor.(I couldn't find the colourful one)
Capacitance of capacitors can be determined by using 3 ways.
-Colour Code Table (CCT)
-Multimeter
-By Inspection
For more information about inspection, you can click this inspection link..
In the end of the class, En. Ridzuan showed us an interesting experiment, that is the blowing part. Actually, he explode the capacitors just to show us what is the result when the capacitors are connected with the wrong ends. So, when he connect the capacitors to the current source, the capacitors took some times and exploded after that. Then, En. Ridzuan asked us to test it on another capacitor.
In overall, the last week class was very interesting. I really hope that we can have another components to be exploded in the next classes. Last but not least, thanks for reading.
