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Power Your DSL Modem Using USB
Power Your DSL Modem Using USB
Harnest the power of your laptop usb bus to turn on modem
Date: 07-07-11
Topic: Tutorials and Guides
Author: bean_laden

Pros:
Powercuts wont interrupt your access to internet. :) Cheap / almost free

Cons:
none. :)
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Power Your DSL Modem Using USB




Power Your DSL Modem Using USB

It all started when the battery of my custom made inverter conked out. It was dedicated for my PC setup. Then started the horrible disconnections of internet whenever there was a powercut. Initially I thought of getting a low capacity UPS.. something like those which comes for 1000-1500 as I was pretty sure it would power the modem for at least 1-2 hours. I had almost decided to get this when I started toying with the idea of powering the modem with my laptop's backup.

I use a Lenovo laptop & get around 3 hrs backup. The modem i have is Beetel 220BX which is connected to Airtel landline.

Initially thought of powering the modem directly from the laptop battery...but it looked more complicated than required as the pins of the battery were not so mod friendly and I did not want to ruin the warranty of the parts.

Then thought of a USB connection. When you skin a typical USB wire, you can see 4 wires (protected by braided material).



The Red and Black draws power & other two is for data communication

Now to check if I could power my Beetel modem using the USB, I checked the power being drawn and it was nearly 5V.



And then I checked how much was the required input for my modem



And Bingo!..... it requires nearly 5v!...

Making the cord

For this purpose I got a old Nokia ISB cable..(I think it belonged to a 7 yr old N7610 )..

Cut open the USB cable, stripped it to expose the 4 thin wires. The Red & Black ones are the important ones for us.



Similarly cut a non functional dc adapter & stripped the wire to expose the 2 power wires .



Connected the cables from both these cables & soldered them together.



The cable is now ready to be plugged in



And It finally works, the Ghetto USB power cable for modem is now ready.





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  #1  
By harijith321 09-07-11
Re: Power Your DSL Modem Using USB

great ... I am gonna try this ...
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  #2  
By dexbg 09-07-11
Re: Power Your DSL Modem Using USB

Amazing .. true to the Indian spirit . Jugaad ..
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  #3  
By megan 09-07-11
Re: Power Your DSL Modem Using USB

my airtel modem already came with power from laptop cable . only costs 20 rs btw , buy that
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  #4  
By Xeo 09-07-11
Re: Power Your DSL Modem Using USB

^Lol.
Awesome DIY project bean!
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  #5  
By Sumonpathak 09-07-11
Re: Power Your DSL Modem Using USB

true indian jugaad mod
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  #6  
By bean_laden 10-07-11
Re: Power Your DSL Modem Using USB

Thnx guys...


Originally Posted by megan View Post
my airtel modem already came with power from laptop cable . only costs 20 rs btw , buy that
Why buy when i can make?..
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  #7  
By wingzero 10-07-11
Re: Power Your DSL Modem Using USB

cons if you're using a wifi network ...
Neverthless good DIY beanie
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  #8  
By JD666 10-07-11
Re: Power Your DSL Modem Using USB

good job beanie.. I had to bribe the airtel engineer 100 bucks to get this from him. Its really comfortable since u dont need to search for additional power points to connect the modem. Good job!!
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  #9  
By MOZ 11-07-11
Re: Power Your DSL Modem Using USB

Great write up. JUGGAADU!
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  #10  
By MaxAxe 11-07-11
Re: Power Your DSL Modem Using USB

Awesome .... but you have to have it at 5 volts otherwise it wont work ... nice jugaad though
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  #11  
By megan 13-07-11
Re: Power Your DSL Modem Using USB

Originally Posted by JD666 View Post
good job beanie.. I had to bribe the airtel engineer 100 bucks to get this from him. Its really comfortable since u dont need to search for additional power points to connect the modem. Good job!!
haha it costs 25 rs from airtel engineer . i had taken 2 for 50 rs

---------- Post added at 10:03 PM ---------- Previous post was at 10:03 PM ----------

Originally Posted by megan View Post
haha !! it costs 25 rs from airtel engineer . i had taken 2 for 50 rs
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  #12  
By JD666 14-07-11
Re: Power Your DSL Modem Using USB

A USB output is 5v... no rocket science there... @megan - ill be smarter next time!!
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  #13  
By npsingh123 30-07-11
Re: Power Your DSL Modem Using USB

It is a very good hack removing the need for a separate power supply/wall socket.

BTW S Korean and Chinese govt made it in a law to remove proprietary charger pins from their market. Chinese government demands all handsets be rechargeable via USB -- Engadget Mobile

BTW the OP has the same multimeter as me!
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  #14  
By udaykhan 29-10-11
Re: Power Your DSL Modem Using USB

Good DIY and precise walkthrough steps. Only one question: AFAIK a single USB port can supply max 500mA at 5V DC. The power adapter clearly says it needs 5V 1A. Can you explain. I think I am missing something here. I am not very good at these things but wish to learn.
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dsl, modem, power, usb

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