Aminij Embedded Solutions: July 2009

5:18 PM

Battle Of Technologies

Posted by Milan Patel 5:18 PM |

A Japanese, American, and Filipinos are curious about the technologies of their ancestors in communication. So what they do is dig a hole in their land. The dimension is 40 meter deep and a diameter of 5 meters.

Japanese was the first one to dig.

Japanese: We found a lot of copper! The technology of our ancestors is "Wire communications"

Next are the Americans.

Americans: We found a lot of fibers! So our ancestors use "Fiber optics communications"

Next are the Filipinos.

Filipinos: We found nothing!

The Americans and Japanese laughs.

Filipinos: Wait! can we dig 40 meters more?

Americans: OK you can dig 40 meters more! I hope you found something! ( They say it with laugh).

The Filipinos are hoping the find something after they dig 40 meters. After they dig 40 meters more, again they did not find anything.

Filipinos: We did not found anything!

The americans and japanese laugh again!

Filipinos: What are you laughing?

The americans and japanese laugh

Filipinos: These means that our ancestors are using "Wireless Communications" !

Japanese: Woahh

Americans: Unbelievable!

comments (0)

5:13 PM

Hi-Tech Shoes

Posted by Milan Patel 5:13 PM |

Hi-Tech Shoes. Powered By Linux

comments (0)

8:16 PM

World's first pure white LED

Posted by Milan Patel 8:16 PM |

Energy-efficient light-emitting diodes (LEDs) are projected as the predominant lighting source of the future, replacing the incandescent bulbs as well as compact fluorescent lights (CFLs). But, LEDs do not naturally produce white light, and getting them to look like they do adds to their production cost, making them much more expensive than an average incandescent bulb or compact fluorescent lamp. Also, the quality of their light output is not that good.

Soo-Young Park at Seoul National University, South Korea, and colleagues at the University of Valencia in Spain, have engineered a molecule that combines two light-emitting materials, orange and blue, to produce a white light in the visible light spectrum. This single molecule behaves like two separate light-producing molecules when stimulated with a voltage, it produces orange and blue light that mix to create white. A large population of the molecules reliably produces equal quantities of orange and blue light that mix to produce an even white.

The new form of LED molecule is said to be efficient, colour stable and reproducible, making it an ideal candidate for use in LED lighting.

comments (0)

8:07 PM

Solar Powered Mobile

Posted by Milan Patel 8:07 PM |

Charge your mobile anywhere the Sun is shining when electricity is unavailable. Samsung has introduced a solar-powered mobile phone, the Solar Guru (Guru E1107), in India. However, the solar power charging is only an option and not the main mode of charging. To charge the battery fully via the solar panel, the phone needs to be kept in the Sun for 40 hours. The Solar Guru can provide around Samsung Solar Guru five to 10 minutes E1107 of talk time with one hour of solar charging.

Earlier, a Chinese manufacturer had also announced a solar-powered cell phone. It claimed that placing the phone under strong sunlight for one hour would support 15 minutes of talk time and about eight hours exposure to strong sunlight was required to fully charge the cell phone. Japanese electronics company Sharp is also planning to launch its solar-powered phone SH002, which can give one minute of talk time and two hours of standby with a 10-minute charge in the sun

comments (0)

9:21 PM

Funny Oscilloscope...!!!

Posted by Milan Patel 9:21 PM |

comments (0)

9:08 PM

Interview Of Electrical Engineer

Posted by Milan Patel 9:08 PM |

Subject : electrical Engineering

Interviewer: Why is a thicker conductor necessary to carry a current in A.C. as
compared to D.C. ?

Candidate: An AC current goes up and down (drawing a sinusoid) and requires more space inside the wire, so the wire has to be thicker.

Interviewer: How will you tell if that wall outlet carries AC or DC ?

Candidate: I will put my finger in. If it is pushed away, it is DC. If it gets stuck, it
was AC.

Interviewer: How will you reverse direction of an induction motor?

Candidate: I will remove the four bolts at the base, turn the motor around, and put back the bolts.

Interviewer: How do you start a synchronous motor?

Candidate: Vrrrrrrrmmmmmmmmmmmmmmmmmmm (in rising pitch)

Interviewer: Stop! Stop!

Candidate: rrrrrrrmmmmmmmmmmmmmmmmmmmm (in falling pitch)

Interviewer: How do you limit surge current within an integrated circuit?

Candidate: By using a miniature circuit breaker.

Interviewer: " Why does a capacitor block DC but allow AC to pass through?

Candidate: See, a capacitor is like this ---| |--- , OK. DC Comes straight, like this ----------, and the capacitor stops it. But AC,goes UP, DOWN, Up DOWN and jumps right over the capacitor!"

Interviewer: "What is a step-up transformer?"

Candidate: "A transformer that is put on top of electric poles."

Interviewer (smiling): "And then what is a step-down transformer?"

Candidate (hesitantly): "Uh - A transfomer that is put in the basement or in a pit?"

Interviewer (pouncing): "Then what do you call a transformer that is installed on the ground?"

(Candidate knows he is caught -- can't answer)

Interviewer (impatiently): "Well?"

Candidate (triumphantly): "A stepless transformer, sir!"