Research Cell » General

7809 Pin and Circuit Diagram

genius — Wed, 04 Nov 2009 15:27:43 +0000

7809 is a voltage regulator integrated circuit(IC) which is widely used in electronic circuits. Voltage regulator circuit can be manually built using parts available in the market but it will take a lot of time to assemble those parts on a PCB. Secondly, the cost of those parts is almost equal to the price of 7809 itself so professionals usually prefer to use 7809 IC instead of making a voltage regulator circuit from scratch. Before you start using 7809, you will need to know about the pin structure of IC 7809. Apparently, it looks like a transistor. It has three pins. For a better understanding, I have given an image of 7809 bellow. Please take a look.

You can easily see the V in and V out pins as well as the ground pin. It is really easy to use 7809 for voltage regulation purposes. I have also included a circuit diagram of 7809 so that you may learn how to use it in a circuit diagram.

7809 Pins

It is wise to use two .1uF capacitors on both input and output sides to filter any ripple or distortion in voltage but it is not necessary. In the image, you can see that 12V are being supplied on the input side of 7809 but the out put side of 7809 is outputting Regulated 9V. As long as the input voltage remains above 9V, output voltage of 7809 will remain smooth and regulated.
Please note that input voltage of 7809 can be up to 23V but under my experience, it is wise to avoid input over 15V. 7809 is claimed to output 9V and almost 1.5A Current but again, I have experienced that we should not put a load over 9V and 1A on it. Since we are using it in power supply, the transfer of power will result in heat output. We will need to use a heat sink with 7809 otherwise this heat can damage it. It is advised to use a 1A fuse on the output side of 7809 and a 1.5A fuse on the input side of 7809 to avoid damage in case of short circuit.

7809 Circuit Diagram

How to commit suicide?

genius — Sat, 09 May 2009 11:02:19 +0000

If you are reading this article then either you are researching on suicide or you are finding painless ways commit suicide like pills, suffocation, poison or anything else. No mater what you are up to, please read this article from start to end, believe me, it may change your mind. Suicide which can be shortly defined as self killing has been a phenomenon in every society. I personally believe that the major factor which can cause a person to commit suicide is the loss of hope. Yes, Hope, is some thing on the basis of which we are all living our lives. We always hope for some thing, and thus keep living on. A poor man hopes that the good days will come so he constantly struggle to live. An ill person hopes that some day he will become healthy so he tries to live a life. A lover hopes that he will get his love one day and in this hope he keeps his normal activities. But when some how, the hope factor is no longer available, some of the human beings tend to lose interest in their life. Although this is always a temporary emotional phase but it is critical as well. In this period, the relatives, friends and the people with close contact to the person can play a major role in moral stimulation. Time acts as a bandage for such wounds on ones soul. With the passage of time, every thing will come to normal, all you need to do is to control that specific period of hopelessness. You might argue that depression is the main cause due to which a person commits suicide. Depression is also a state of hopelessness so it will make no difference in my article.
If you are reading this article because you were planning to commit suicide, then please think about your parents, your brothers, sisters and your friends. If you don’t have any then think about the other people in this world, many of them are in much more grief than you. They are still living, if you want to give away your life, then don’t give away it to your grave but give it to them. What does that mean? That means dedicate your life to do some thing useful for humanity. If some thing bad happened to you, try to protect others from the same thing. That is called real life. Life is not just thinking about your own desires. Life is a one time gift, don’t waste it. If you will commit suicide, nothing will change in this world, no one will even know about your death other than some people who knows you. But if you will dedicate your life for humanity, you will find a lot of sincere people who will indeed care about you.
So, next time you search on Google, don’t search for how to commit suicide or ways to suicide; search for how to live a happy life instead .

Aluminum Free Deodorant and Antiperspirant

alex — Fri, 01 May 2009 13:08:24 +0000

Aluminum is one of those rare metals which are toxic for human body. Unfortunately, aluminum can be absorbed by our skin cells as well. Many of us have to use body sprays, deodorants and antiperspirants especially during summer. During summer, our body tends to sweat more so we have to use deodorants and antiperspirants to avoid the bad smell caused by body sweating. Most of us are not aware that most of deodorants and antiperspirants contain aluminum in them. When our skin is exposed to these antiperspirants and deodorant sprays, Aluminum is coated on the surface of our skin. This aluminum is then free to be transferred to the inner side of your body. A continuous exposure to such deodorants and antiperspirants can cause Alzheimer’s and brain disorders. In addition to that, such aluminum sprays can also cause breast cancer.
So Aluminum free deodorants and aluminum free antiperspirants should be used to avoid health hazards. Aluminum can cause neurological and respiratory problems. Aluminum Oxide is a key component of deodorants and antiperspirants. It is a powerful astringent which closes pores and stops sweat and odor. Although this looks like a good thing to you but remember if those toxins which cause odor doesn’t leave the body, what will happen to your inside system. It will remain contaminated because the toxins will unable to leave your body. This will weaken your immune system and viruses and bacteria will be free to harm your body. For this reason, deodorants and antiperspirants are linked to various health problems. Although aluminum free deodorants might not be as effective but they can still occupy odor by their fragrance. You can also use natural fragrance like usage of flower extracts. Staying clean by taking frequent baths also helps and you won’t even need aluminum free deodorants or aluminum free antiperspirants.

Research on Quran

alex — Thu, 02 Apr 2009 11:28:34 +0000

Quran is the Holy book of Islam. Muslims believe that it is the word of God. I have been researching on Quran and have concluded that it has some extra ordinary qualities. For example, many of the things mentioned in this book were not possible to be revealed 1400 years ago which modern science has revealed. I am stating some of my research points here.

“30- He made the earth egg-shaped.”
(79-The Snatchers, 30 )

“dahw” is an Arabic word which means rotundity like that of the ostrich’s egg. 1400 years ago, no one could know about the actual shape of the Earth. Even the books written centuries after the descent of the Quran resembled the shape of Earth to a tray like thing.

At two different places, it is mentioned that plants also have pairs and they have sexual properties.

53-“ And has sent down water from the sky. With it have We produced diverse pairs of plants. “
(20-Ta-He, 53)

3-“ …And fruit of every kind He made in pairs two and two. “
(13-The Thunder, 3)

It was impossible for some one to know such information 1400 years ago so it was extra ordinary information with respect to that age.

Now lets move to some highly technical information written in Quran which was impossible for any one to even guess.

“1- By the heavens and The Knocker.
2- How will you comprehend what the The Knocker is?
3- It’s a piercing star. “
(86-The Knocker, 1-3)

In 1967 Jocellyn Bell accidentally stumbled on a gravity time warp which was a million times greater than that produced by sun. The object she detected was continuously emitting pulses. These pulses were just like heart beats. At that time, such a pulsating object was unknown to exist in space. It was concluded that these pulse signals are being generated by intelligent beings of another planet. However afterwards scientists came to know that it was a spinning neutron star also known as pulsar or we can say “Knocker Star”. Now question arises how is it piercing? The answer is a single spoonful of matter taken from a pulsar would weigh billions of tons. So a small particle of this matter placed on earth will pierce it down to the center. Don’t you think this information is amazing?

Here is one more high tech information by the Holly book of Quran.

“104- On that day We will fold the heaven, like the folding of a book. Just as We initiated the first creation, We will revert it. This is Our promise. We will certainly fulfill it. “
(21-The Prophets, 104)

One of the latest and most famous theories of creation of this universe indicates that this universe is expanding like a balloon. It will expand till some extend and then it will revert back and this will be end of the Universe.

I have only posted some of my research points here because if I will include all of the research points here, it will cover hundreds of pages here. If this article interests you, I suggest that you should read the Translation of the Holy Quran with an open mind. You will find a lot more information within it.