31 Oct '16, 5am

Forget Wifi or Bluetooth, Pair Directly With Your Phone’s Speaker: [Kedar Nimbal...

Forget Wifi or Bluetooth, Pair Directly With Your Phone’s Speaker: [Kedar Nimbal...

[Kedar Nimbalkar] hyperbolically advertises the ultimate cell phone speaker dock . It costs a dollar. It doesn’t need you to pair with it via Bluetooth or WiFi. It pairs extremely fast, 0.000000000001, he clarifies. It may also look like a broken laptop speaker with a stomped wall wart soldered to it, but who can keep up with industrial design trends these days? He shows us the device in operation. He starts playing some music on his phone’s speaker. It’s not very loud, so he simply lays the phone on the dock. Suddenly, all the audio fidelity a Dell Lattitude from the 90s can provide erupts from the device! How is this done? Of course, there’s not much to the trick. Since the cellphone speaker is a coil it can induce a small current in another coil. The resulting voltage can be picked up by an audio amplifier and played through the speakers. Nonetheless it’s pretty cool, a...

Full article: http://hackaday.com/2016/10/30/forget-wifi-or-bluetooth-p...

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