Charge mobile by hand heat | Mustafa Abdalwahid Noori | TEDxBaghdad

The idea is to take advantage of the heat of the hand and turn it into 5 volts and 200 milli-amperes of DC power, enough to charge smartphones in cases of emergency.

This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at http://ted.com/tedx

My idea is to use the heat of the hand

and turn it into a continuous
5 volts of DC power

I used the simplest tools for this idea.

Of course, this is
the final shape of the project.

I used the simplest tools for that.

For example, the first thing
is a thermoelectric device.

It's a device that turns heat
into volts and amperes.

The value of these volts and amperes
is extracted from this simple graph.

As the heat emitted
from the hand is very little,

it will produce very little voltage,

20 millivolts.

These 20 millivolts are added for each
of the four parts in a series of the hand

that generated 80 millivolts.

I had a problem to turn
these 80 millivolts into 5 volts.

I faced a bigger problem with that.

Turning the 80 millivolts
into 5 volts is a huge deal

Using this circuit, I was able
to turn the 80 millivolts into 5 volts.

These 5 volts are fluctuating.

I was forced to use a very high-value
electric capacitor of 4 farads.

It consists of two layers.

The function of this capacitor

is to smooth the fluctuations
that exist in the circuit,

which will store energy and unload it
in about half an hour.

Before the circuit output,
I used a voltage regulator.

The function of this regulator
is to fix the output voltage to 5 volts,

whatever the input volt may be.

I used a USB module for the output.

Through this module,
we can insert a mobile phone charger.

Of course, this module will give us
5 volts with 500 milliamperes,

which is enough to charge
a mobile phone from 0% to 100%

in one-and-a-half to two hours.

Thank you.

(Applause)