New generator could bring electricity to 25% of the population that needs it

25% of the total of the world's population has no access to any kind of electrical energy. This would be like imagine almost all the American continent in the dark. Therefore became the energy of "Pocket". A portable invention which could bring electricity to more than 1.5 billion people worldwide who lack of lighting. The device is active, only, heat and cold.
The PowerSot company, responsible for marketing the product, said that only in Finland there are close to 500,000 homes isolated and without supply. In addition, it said that "tens of thousands of people die each year by illegally hooked their street stalls to the mains or use kerosene"
The system consists of a metal plate which must be heated and the other, of the same material, that should cool down. To contact both zones they generate an electric current that produces energy. In this way, the appliance can provide electricity of sufficient intensity to charge mobile devices through a built-in USB port, batteries, and light bulbs LED.

Mexico, 79 in a ranking that measures countries technology

Mexico lost 16 places in the 2014 index on the technologies of the information (ICT) of the World Economic Forum (WEF) put on 79 position among 148 Nations analyzed, when in 2013 was placed at place 63. This despite the fact that in both years kept the same rating, 3.89 points on a scale where the maximum is 7, which was not achieved by any country since the first preserved it Finland with a score of 6.04 points.
Mexico, the subscripts where he got the worst ratings for the part WEF are the rates of mobile where he held the position 129 of 148, because on average the calls are charged at 0.52 dollars per minute, in the quality of the educational system with the site 119 with 3 points, on "the effectiveness of legislative bodies" where he held the position 114 with a 2.9 pointand "independence of the judiciary" with 90 place on the efficiency of the legal system for the settlement of disputes"in place with 3.3 98 points.
In terms of Latin American and Caribbean countries that led to Mexico, the NRI points out that Chile achieved the best position in the region with 35 place and a score of 4.61. Immediately settled Puerto Rico, which is a state associated with United States, in the place with a rating of 4.54 41, Panama on the site 43 with 4.36 rating, Costa Rica 53 with 4.25 points, Barbados in 55 with 4.22, Uruguay in 56 with 4.22 points, Colombia in 63 with 4.05 points, Brazil in 69 with 3.96, and Trinidad and Tobago in 71 with 3.97 points.

SAVE ENERGY WITH YOUR MOBILE PHONE

Here are 6 simple tips to easily turn your cell phone green.

1. Unplug Your Phone Charger When Unused

Did you know your phone’s charger still draws energy even when it’s not plugged into your phone? Unplug it when it’s not in use.

2. Minimize Your Phone’s Backlight

If your phone’s backlight is illuminated for longer than you need, you’re wasting energy. Reduce it so you’re only using what’s necessary. Your phone’s battery will thank you.

3. Power Off Your Phone Entirely

If you’re in a movie, an airplane or somewhere else you know you can’t be reached, why not power off your phone? Just keeping it on vibrate uses its battery when you don’t need it. Your voicemails and texts will come later.

4. Only Replace Your Phone When Necessary

Don’t buy a new phone until you need it. Recycle your old phone when you do.

5. Only Charge Your Phone When Necessary

Many people are accustomed to charging their cell phones every night whether or not the battery has been depleted. To be less wasteful, don’t charge your phone until the battery really needs it.

6. Save Paper With Your Phone

Your phone can be used as a digital notepad of sorts. Instead of using paper, make cell phone lists by texting or emailing yourself. 

ELECTRIC CIRCUITS. HOW THEY WORK?

As we are studying the electrical circuits I thought it would be logical that you know how they work. This is a video that explains it very well( I can't insert the video)

Mobile World Congress.

This week it's the most important for porable technology. Barcelona celebrates, like every year, the mobile world congress. There are a lot of news about android, iphone, samsung...

You can see everything here

                                          

GEAR

A gear is used to transmit circular movement through the contact of gear wheels. One of the most important applications of gears is the transmission of the movement along the axis of a power source, such as an internal combustion engine or an electric motor, until another axis located at some distance and that has to work.The gears are composed of two gears, of which the largest is called Crown ' and the smaller 'gear'.



 

Speeds entry (shaft) and out put (driven shaft) are inversely related to the number of teeth of wheels that are connected to (same as the transmission by cadena-pinon) to be satisfied that:
N1·Z1 = N2·Z2

 that the speed of the driven shaft will be: N2 = N1·(Z1/Z2) where:
N1 speed of shaft rotation conductor
N2 rotational speed of the driven shaft
 Z1 number of teeth of the number of teeth
Z2-number of teeth of the pinion

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