Live Updates: COVID-19 Cases
  • World 21,355,685
    Confirmed: 21,355,685
    Active: 6,443,009
    Recovered: 14,149,309
    Death: 763,367
  • USA 5,476,266
    Confirmed: 5,476,266
    Active: 2,429,584
    Recovered: 2,875,147
    Death: 171,535
  • Brazil 3,278,895
    Confirmed: 3,278,895
    Active: 788,022
    Recovered: 2,384,302
    Death: 106,571
  • India 2,525,222
    Confirmed: 2,525,222
    Active: 668,532
    Recovered: 1,807,556
    Death: 49,134
  • Russia 912,823
    Confirmed: 912,823
    Active: 174,361
    Recovered: 722,964
    Death: 15,498
  • South Africa 579,140
    South Africa
    Confirmed: 579,140
    Active: 105,850
    Recovered: 461,734
    Death: 11,556
  • Peru 516,296
    Confirmed: 516,296
    Active: 136,208
    Recovered: 354,232
    Death: 25,856
  • Mexico 511,369
    Confirmed: 511,369
    Active: 109,808
    Recovered: 345,653
    Death: 55,908
  • Chile 382,111
    Confirmed: 382,111
    Active: 16,734
    Recovered: 355,037
    Death: 10,340
  • Spain 358,843
    Confirmed: 358,843
    Active: 330,226
    Recovered: ?
    Death: 28,617
  • Iran 338,825
    Confirmed: 338,825
    Active: 25,683
    Recovered: 293,811
    Death: 19,331
  • UK 316,367
    Confirmed: 316,367
    Active: 275,009
    Recovered: ?
    Death: 41,358
  • Saudi Arabia 295,902
    Saudi Arabia
    Confirmed: 295,902
    Active: 29,605
    Recovered: 262,959
    Death: 3,338
  • Pakistan 288,047
    Confirmed: 288,047
    Active: 16,261
    Recovered: 265,624
    Death: 6,162
  • Bangladesh 271,881
    Confirmed: 271,881
    Active: 111,667
    Recovered: 156,623
    Death: 3,591
  • Italy 252,809
    Confirmed: 252,809
    Active: 14,249
    Recovered: 203,326
    Death: 35,234
  • Turkey 246,861
    Confirmed: 246,861
    Active: 11,947
    Recovered: 228,980
    Death: 5,934
  • Germany 223,774
    Confirmed: 223,774
    Active: 11,935
    Recovered: 202,550
    Death: 9,289
  • France 212,211
    Confirmed: 212,211
    Active: 97,957
    Recovered: 83,848
    Death: 30,406
  • Canada 121,652
    Confirmed: 121,652
    Active: 4,690
    Recovered: 107,942
    Death: 9,020
  • China 84,808
    Confirmed: 84,808
    Active: 655
    Recovered: 79,519
    Death: 4,634
  • Netherlands 61,840
    Confirmed: 61,840
    Active: 55,673
    Recovered: ?
    Death: 6,167
  • Australia 23,035
    Confirmed: 23,035
    Active: 9,301
    Recovered: 13,355
    Death: 379
  • S. Korea 15,039
    S. Korea
    Confirmed: 15,039
    Active: 833
    Recovered: 13,901
    Death: 305
  • New Zealand 1,609
    New Zealand
    Confirmed: 1,609
    Active: 56
    Recovered: 1,531
    Death: 22

Battery-free cellphone unveiled by University of Washington researchers

Author at TechGenyz Mobile
Battery Free Cellphone

We all face the common issue of our cellphones running out of power during urgencies. Dozens of inventive charging technologies across the world are being worked up to enhance battery power solutions. But what if we could get rid of using batteries for cellphones instead? A group of researches at the University of Washington is going forward with this approach, resulting in an unveiling battery-free cellphone.

The battery-free cellphone of the group is able to use energy from ambient light and radio waves, according to a recent paper published. The current model is in the prototype stage as of yet. But the group has already found a way to convert analog sound signals into digital signals, which can be processed by a cellphone. This was the biggest puzzle to sort out for the group to transform the technology into a reality.

Shyamnath Gollakota, one of the authors of the published paper, said in a UW press release that they have built “the first functioning cellphone that consumes almost zero power”. Gollakota works as an associate professor for the UW’s Paul G. Allen School of Computer Science & Engineering.

He went on saying that they had to work from the ground up regarding the designs of the devices for making those savvy for low power consumption and to derive energy from the environment.

The following video demonstrates the device.

The phone was built by the usage of off-the-shelf computing components alongside a custom printed circuit board. The device runs on about 3.5 microwatts. This can be derived from either a tiny solar cell or radio waves sent out by a custom-built base station. The solar cell would be about the size of a grain of rice and would be attached to the device.

So how does the phone work? When you are speaking into the phone, its antenna picks up vibrations of the microphone. These vibrations are then encoded in radio signals. Communication is received by phone via encoded radio signals, and it is then translated into vibrations of the speaker of the phone.

These operations consume very little power. This helps researchers to make calls through the base station. The base station can be integrated into existing cell service infrastructure for allowing users for wide usage.

The current prototype has a button for the user to press for supporting the movements between sending and receiving modes. The phone requires being within about 30 feet of the base station in order to operate. The group is working on improving these aspects of the device for the future.

The researchers previously came up with battery-free wireless communicators designed for the IoT devices.