Emergency Mobile Charger Using Dynamo

About: Helping people make awesome stuff !

Looking for a way to charge your phone when you are completely out of options? Make yourself a emergency mobile charger or rather with a dynamo which could come handy especially while traveling or while outdoor camping. This is a hobby project which can be made by anyone following some very simple instructions. The charger works on the principal of dynamo being used as a generator converting mechanical energy to electrical energy. Since the voltage required by a phone is 5V a voltage regulator IC 7805 is used to get the desired output voltage from the dynamo.

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

Supplies:

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 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 dynamo 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 connections as shown step by step in the pictures.

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’

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