Emergency Mobile Charger Using DC Motor

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Introduction: Emergency Mobile Charger Using DC Motor

About: Helping people make awesome stuff !

Introduction

This is a hobby project which can be made by anyone following some very simple instructions. The charger works on the principal of DC motor being used as a generator converting mechanical energy to electrical energy. But since the voltage required by a phone is 5V a voltage regulator IC 7805 is used to get the desired output voltage from the DC motor.

For more information and details, click here : https://www.engineeringworldchannel.com/mobile-charger-dc-motor/

Step 1: Items Required

1. DC motor 12V – 60RPM: Geared motor most suitable for this project. (Available here: http://geni.us/motor1)

2. Voltage regulator IC 7805: This will give you constant output voltage, doesn't matter what the input voltage is. (Available here:http://geni.us/IC7805)

3. Male – female USB cable: The female end is required to connect the USB cable of the phone to the generator. (Available here:http://geni.us/USBCable2)

4. Glue Gun (Available here: http://geni.us/gluegun1)

NOTE: Please note the above links are affiliate links, which means that if you click on one of the product links, we receive a small commission. Thank you.

Step 2: How It Works?

When the shaft of the DC motor is rotated a DC voltage is induced at the terminals. But since its not possible for a human being to maintain a constant RPM of the shaft the output voltage of the motor keep varying at some time going beyond 5V which is above the save limit of the phones. Thus an IC 7805 is used to regulate the voltage and to make sure that we have a constant 5V.

The following are the steps to be followed:

1. Cut out the female end of the USB cable and clip of the data cables. (We require only RED and BLACK wires)

2. Now using a solder iron make the following connections as given below :

3. Paste the IC 7805 and female USB port on the surface of the motor using a glue gun so as to secure it on the surface.
4. Use a right angled iron rod at the shaft as handle for the ease of rotation.

5. Bingo! now you are ready to test your ‘Emergency Mobile Charger’

Step 3: Detailed Video

For more information watch the video.

1 Person Made This Project!

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22 Discussions

0
JorgeA268
JorgeA268

11 months ago

I followed all the steps described above but couldn't make it work

0
chvradhakrishna
chvradhakrishna

Question 2 years ago on Step 3

WHAT HAPPEN IF WE USE CELLPHONE CHARGER INSTED OF IC 7805?

0
chvradhakrishna
chvradhakrishna

2 years ago

Sir, if I use cell phone charger insted of IC 7805 WHAT HAPPEN?

0
Ashishb51
Ashishb51

3 years ago

Hi,
I prepared 1 project to charge smartphone via bicycle dynamo, i used DC motor, IC7805, Capacitor & charging cable, I connected them in parallel & when I'm checking the output voltage in multimeter, it shows 5V & current more than 200mA, & when i connect my smartphone, it shows connected & within second it shows disconnected, & unable to charge my phone,
so like to know where I'm doing wrong,
kindly suggest,
Thanks in advance,

https://youtu.be/DKT35foh9dY

0
Laibaig
Laibaig

Reply 2 years ago

Hey!

I apologize for the late response. Is your problem solved?

0
Yogesh_Tharani
Yogesh_Tharani

3 years ago

A great idea to work with!! Can this motor be used to make a mobile charger running on wind energy?

0
Laibaig
Laibaig

Reply 3 years ago

That's a very innovative idea !
Yes it can be, provided the RPM of the motor is high enough such that the output voltage is greater than 5V so that the IC 7805 can give a stable output.

Please do share when you make it ! :D

0
Bolmik
Bolmik

Reply 3 years ago

Will it work for an hour or so??????

0
Yogesh_Tharani
Yogesh_Tharani

Reply 3 years ago

So have i to use the motor with rpm>60? Or the motor which you have used will work? ie. for vehicle having speed around 50-60km/hr.
Also how much current is produced by the motor used by you?

0
Laibaig
Laibaig

Reply 3 years ago

What I meant was that the RPM of the motor when exposed to wind (Let's say while in a moving car) should be high enough so that the output voltage of the DC motor is greater than 5V.

The maximum output current as per the data sheet of IC7805 is 1.5A

0
Bolmik
Bolmik

3 years ago

Will it work for an hour

0
Bolmik
Bolmik

3 years ago

How long does it work ?

0
BharainiD
BharainiD

3 years ago

Can you give the diode specification to be used to prevent back emf

0
BharainiD
BharainiD

3 years ago

Does this work

0
Laibaig
Laibaig

Reply 3 years ago

Yup it does, why don't you follow the steps I have mentioned and try yourself. If you face any difficulty feel free to contact me :)

0
ahmet_024102
ahmet_024102

3 years ago

thank you. but its can be dangerous because not safety. why battery will take not good amper. because generator changin mA everytime. this is just important time means no places elecktric ok you can use this. but normal time dont do like this. important good energhy

0
Laibaig
Laibaig

Reply 3 years ago

Thank you for your feedback :)

0
Laibaig
Laibaig

Reply 3 years ago

Thank you so much :)

I'm glad you liked it, have a beautiful day.