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Power-over-Wi-Fi: Indian origin scientist develops Wi- Fi based system to power cameras

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Washington: An Indian-origin researcher Vamsi Talla has developed a system, that uses Wi-Fi internet signals to beam power to remote devices such as a surveillance camera.

The system is first of its kind and is known as power-over-Wi-Fi.

The idea is simple in concept. Wi-Fi radio broadcasts are a form of energy that a simple antenna can pick up.

Until now, Wi-Fi receivers have all been designed to harvest the information that these broadcasts carry.

Talla simply connected an antenna to a temperature sensor, placed it close to a Wi-Fi router and measured the resulting voltages in the device and for how long it can operate on the remote power source alone.

Even more ambitiously, the team also connected a camera to their antenna.

This was a low-power sensor capable of producing 174 x 144 pixel black and white images, which requires 10.4 milliJoules of energy per picture.

To store energy, they attached a low leakage capacitor to the camera which activates when the capacitor is charged and continues operating until the voltage drops to 2.4 Volts.

The images were stored in a 64 KB random access memory (RAM). In the subsequent tests, the camera performed remarkably well.

“The battery-free camera can operate up to (about five metres) from the router, with an image capture every 35 minutes,” Talla told MIT Technology Review.

By adding a rechargeable battery, he increased the distance to seven metres.

The router could even power the camera through a brick wall, demonstrating that it would be possible to attach the device outside while keeping the power supply inside.

“The technology would be hugely useful for surveillance, perhaps connected to a movement sensor to trigger the camera when something moves in its field of view,” Talla noted.

The team also connected their antenna to a Jawbone fitness tracker and used it to recharge the battery that powered it.

“Using this, we charge a Jawbone device in the vicinity of the power-over-Wi-Fi router from a no-charge state to 41 percent charged state in 2.5 hours,” the team pointed out.

According to the MIT report, power-over-Wi-Fi could be the enabling technology that finally brings the “Internet of Things” to life. (IANS)

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Here’s Why WiFi Failure Makes You Frustrated

Moreover, they also found that as age increases, the level of frustration a person experiences decreases

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Wifi, Pixabay

Do you get frustrated and angry when your WiFi connection stops working? It could be because of your personality, says a research.

The findings showed that when digital technology stops working, people with a fear of missing out (FOMO) — the anxiety that you are missing out a social experience others might be having while you are offline — or an internet addiction displays more extreme reactions.

People who were seen as being more neurotic and extroverted also had more extreme reactions to failures in digital technology.

“The more we use our devices, the more we get attached to them, so when they do not work, we tend to just go a little bit ‘crazy’ or just switch off and stop doing things altogether,” said lead researcher Lee Hadlington, psychologist at the De Montfort University in the UK.

wifi
Why a WiFi failure makes you angry? Pixabay

For the study, published in the journal Heliyon, the team examined 630 participants aged 18 to 68.

 The fear of missing out, internet addiction, extroversion and neuroticism all have a significantly positive influence on maladaptive responses. This means the people most psychologically dependent on digital technology are most likely to have maladaptive responses when it goes wrong.

Maladaptive responses are not only unhelpful, they also have a detrimental impact on productivity and achieving goal, resulting in poor job performance, the researchers said.

Also Read- Apple Continues To Dominate The Smartwatch Market

Moreover, they also found that as age increases, the level of frustration a person experiences decreases.

“If we can understand what leads individuals to react in certain ways, and why these differences occur, we can hopefully make sure that when digital technology does fail people are better supported and there are relevant signposts for them to follow to get help,” Hadlington noted. (IANS)

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