How does my first computer got screwed?

How does my first computer got screwed?

            How does computing help ones life? It makes life easier by streamlining the work done in calculations, text processing, knowledge gathering, and entertaintment etc.But when I bought my first computer I was uncertain about the purpose of having one! Nasty isn’t it? Even I was not finished with my decision whether to buy a desktop or laptop.

            I am having made a little money from my healthcare practice away from my home. I decided to buy a laptop so that I can use it in my stays away from my home. While I purchased my first laptop. I was remaining quiescent at home, alone away from my wife and first child. Those days’ cheaper laptops were not available in the market as these days. We have net books available nowadays which come in around 15000Rs .As matter of fact you can see the price of my first computer was around 34000Rs as it is evident from the receipt scanned copy I had from online pc essentials, a shop in Cochin City.

   

        

I had IBM side by my first Compaq Presario 2000 machine when I dropped to the dealer. I made a reasonable decision to buy Compaq to get satisfied with a wider screen for my multi media activities. I had given away this system to my brother temporarily when I got another job nearer to my family. When I had my first system again in my hands 2 years were elapsed. Might be due to voltage fluctuation problems TFT LCD transistors got hit by failure and ultimately there appeared vertical lines on my display. It gradually increased in number as I kept using my system. I repaired the LCD with a second hand display in a local repair store, which took 6000Rs out of my pocket. I remember that I repaired it after a mighty long 6yrs.After which I had a bit of programming with it. Its processing was gradually deteriorating and ultimately hard disk got screwed. Though all hard disks are made to fail one day some times pc hard disks fail very earlier. I was lucky enough to use my system for a long 7yrs.I was very sad to sell it of in a repair shop for only 2500Rs.

            After my Compaq I had an old HP laptop from one of my cousins. Which also got stuck by processor problem? As its evident that notebooks last for about 3-5yrs.This blog I typed in my latest purchase a powerful i3, 500 GB assembled desktop. Hope this will last quite some time!

Home made AM radio!

Radio receiver is dedicated to entertain and acknowledge human mind. Mechanism of radio transmit ion involves generating audio frequency current, modulation or mixing of this audio frequency with radio frequency, because audio frequency current alone can travel only 332kms in atmosphere. Moreover modulated signal travels in 3 lakh km/sec the speed of light.

                In radio receiver modulated signal is separated into audio and carrier signal in detector stage, which is then amplified and fed to the speaker.

                Intermediate frequency transformers receive all the frequencies, filter the desired frequency and take it to the audio stage. It functions between audio stage and oscillator stage so it’s called intermediate. It’s aligned at 455kilocycles to receive all frequencies. There are three IFTs, white-the detector, green-the inter, and yellow-the oscillator.

                Printed circuit board for AM radio is generally ‘L’ shaped

                To make our band work we need two types of coils. To receive signals3pined antenna coil is engaged. To separate the required channel5pinned oscillator coil is engaged which works hand in hand with the gang. There will be two antenna coils and two oscillator coils for a two band radio.

Medium wave antenna coil is fixed over ferrite rode. Band switch connections are made such that it connects on both the sides of three poles of the band switch.

                While assembling the ‘L’board output stage is assembled first. Driver transformer is checked for continuity in primary coils and the secondary as well as it s checked for shortage. After the transformer being fioxedAC188s are soldered, resistors and capacitor come s in their way. This ultimately completes the output stage.

Next step is to complete the voltage amplifier stage.BC548 is the voltage amplifier transistor. Another amplifier is BC548A.Both of them is connected accoding to the circuit diagram .After the completion of audio stage it is tested for output.

                Audio stage assembly is followed by IFT stage .Oscillator coils and antennae coils are connected accordingly. Whole chassis of radio works as negative pole. Short wave antenna coil require a loop antennae.Radio is powered using a 6volt eliminator. Switched on ..tuned… Fat..Fat…Frrr….rrrrr…………Akashavani ..Kozhikode.Our radio gadget is ready to entertain.

chottu!

We live by coastal kerala, two kilometers from the beachside.Chottu and I love going to the beach. Not only our home side beach, beypore beach, the city beach, gotheeswaram beach, kappad beach, thus the beaches are a plenty. Some times chottu get hit by allergic asthma, the way the medics call it. This creature tortures my son when it comes and has to be killed by the therapeutics.

I give away chocolates to my son from the kakas shop and the bakery. He eats choclates, icecreams candies as they all escape out of his mouth to the cheeks, face and cloths. He always complaints about going to the school. As he feels pain on his feet. His mother immerse his feet in hot water bath since he feel relief.

Sometimes only he sleeps with me otherwise he is comfortable with his grandpa. He stares all the afternoon at the cartoon network. Crackles his homework. I feel happy that he has stopped tearing away his books as he did last year
More on next time. Happy reading..

science stay abreast.

Science stay abreast.Though innovation change as the circumstances .Egg and ovum remain the ingredients of zygote since decades.Computers carry processors and memory though its conf and shape changed.