Sunday, November 1, 2009
Heights of Orthodoxy.....
Saturday, October 31, 2009
Making of Wireless Car
Now in order to control say one motor, we require 2 bits of information while we need 4 bits of information to control 2 motors. The RF module used here is 433/315Mhz ASK type.
In order to drive motors, we need to connect a suitable motor driver at the output of the decoder IC. The motor driver circuit can consist of a Relay, transistorized H-Bridge or motor driver ICs like the L293D, L298 etc.
This schematic shows the use of L293D to drive a pair of DC motors/Geared Motors. The motor supply voltage can go up to 24Volts safely. But the IC supports a maximum of only 600mA current/channel; which is more than enough to drive small DC geared motors.
Add 0.22uF capacitors across both the motors to reduce the effect of noise on the circuitry. We can also add 100uF capacitor between the motor supply pin and the Gnd. Connections M1-A and M2-B correspond to Motor 1 while connections M2-A and M2-B correspond to Motor 2. These control inputs can be connected to any logic circuitry or a microcontroller.
For any queries or explanations you can contact me on rashid301@gmail.com and write a comment below.
Saturday, October 17, 2009
Standards Of Beggars...
When I was child, I could see that beggars got satisfied even after receiving Rs0.25. However it was long back. As I entered my teenage, I was surprised and taken aback when one beggar straight forwardly refused to take Rs1 and declared that I take Rs2 or more. I felt quite embarrassed and disgusted. Then I composed myself and thought, "Perhaps he has too much to beg for a rupee. He must be having a certain higher level than others".
Few years later, again I found myself in a similar kind of situation. By nature, I am altruistic. Because of this benign attitude, I tend to pity people living much below than average standard of living and extend a helping hand to them. I did the same thing that day. I offered the beggar Rs2 feeling complacent as Rs2 was not so meagre as to be denied. As a told you I was again given a shock. He refused Rs2 and demanded Rs5. Damn it, what these beggars think of themselves. They demand money as if we owe it to them and it is our congenital duty to repay the debt. I was bewildered to realize that these beggars find Rs2 too less to be accepted. Nevertheless, he must having a standard even higher than the previous one.
Not all beggars are the same. Some respect money and also the giver. My next illustration will prove this . My Engineering college had started. I was going for my morning lecture. No sooner did I reach the college, I saw an old man sitting there. Without paying much attention, I was about to pass him when he stopped me. Let me put it in his own words here. He said, "Wait boy. Can you please give me Rs5 so that I can eat a 'wada pav'. " I was surprised for two reasons. First of all, this so-called beggar is speaking in English. Secondly he is asking for money by clearly specifying why he needs it. Perhaps, he is a literate beggar who wants to walk with this modern world. . His courtesy, literacy, and emotional voice took no time to melt me. I immediately gave him Rs5. However I was later in ambivalence whether he actually needed money to eat or he fooled me. Watever it is, His standard must be even higher than the previous two.
Recently, 2 months before to be specific, I met an old man in the market. I would not call him beggar because I myself am in dilemma who he was. He approached me. He was wearing an ordinary Kurta-pyjama, had beard and was roaming like any other man there. He came and told me to give him some money as he wanted to buy medicines. I was confused for a little while. Then I thought a little and started asking him questions. "What is the medicine for? How much it will cost?"etc. To earn my faith and convince me he took me with to the chemist shop. Now I was convinced that he isn't lying. He got the medicine, I paid the chemist we had a small chat and then departed. He was one of those who refuse to beg, but have to ask for help from others for their smallest of needs. "He was a needy man, not a beggar", I thought.
Tuesday, October 6, 2009
Game of Sholarships....Part II(INTERVIEW DAY)
Game of Sholarships....
Sunday, October 4, 2009
Environmental Awareness.
He told us that carbon content in atmosphere has reached 390ppm(parts per million) while the number estimated by scientist and geologists for healthy environment is 350ppm. This increase in carbon has resulted in so many hazards all over the world. It has raised the temperature of earth by 1 degree Celsius. All glaciers are melting due to which the sea level has raised. Also the climate has become uncertain. Mumbaikars witnessed tides 5.5m high, the highest tide of the century. Also the rainy season came very late this year in the end of June. Now 2 days back torrential rain and floods claimed 227 deaths in India, out of which 200 died in Andra and Tamil Nadu. All these are known to be the effects of global warming.
He also told us that America which has 4% of world population itself produces 25% of world pollution. All of us were bewildered. This is because of their surplus use of resources like petrol, coal, natural gas, electricity etc. India is getting affected because it is estimated that India must have 33% of land under forestation, however today there is only 12% forest land. Thus we not only need to protect the existing forests but also bring more land under forestation.
The good news: This year the world’s leaders will meet in Copenhagen in December to reach agreement on a new climate treaty, we need them to go farther than they’ve planned to go: we need to make sure they’ll pay attention to the latest science and put forward a plan that gets us back to safety.
So here’s the plan. On October 24, we need you to organize an action in the place where you live, something that will make that most important number visible to everyone. People in more than 1000 communities around the globe have already announced plans—they’ll be school children planting 350 trees in Bangladesh, scientists hanging banners saying 350 on the statues on Easter Island, 350 scuba divers diving underwater at the Great Barrier Reef, and a thousand more creative actions like these. At each event, people will gather for a big group photo that somehow depicts 350--and upload that photo to the web 350.org. As actions take place around the world, we'll link all the pictures together electronically via the web--by the end of the day, we'll have a powerful visual petition linking together the entire planet that we can deliver to the media and world leaders.
If you want to contribute and help us in safety of our earth and human beings then join us on http://www.350.org. We will help you to initiate and spread the message in your area.
Thank you.
Monday, September 21, 2009
Eid Mubarak....
After fasting for the whole month, Muslims celebrate their happiness as an auspicious festival called "Eid". People are so excited and joyous on this day. They get up early in the morning, with the first ray of sun, have bath and get ready for Namaz. Muslims wear their traditional clothes kurta-pyjama, put itr(liquid for good smell, but not scent), eat something sweet, usually 3,5 or 7 dates dipped in milk and go to Eid-gah(the place where Eid Namaz is performed) for Namaz. It is surprising to see such a large crowd that gathers for Namaz. Mats are even put up on streets for people. then Namaz is performed with full discipline. After Namaz people cuddle each other greeting them"Eid Mubarak". Even strangers are wished with the same enthusiasm and affection. And then the tradition of meeting people begins...
On this day, Muslims visit their relatives houses, wish them affectionately and eat shewaain. Even people who haven't seen each other for years meet each other. Such gatherings rejuvenates people's love for each other and bring them closer. Children also enjoy themselves a lot. They receive Eidi(a small sum of money) from elders.They use this money to buy toys, sit on different types of rides that come in the area, chocolates etc.
Eid is a festival celebrated in peace without any noise. It has a very special importance in every Muslims life. It is a sign of unity among them which shows that even if they don't meet regularly they are still together and remember each other.