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My Evo Speaker Back-lit mods and More!

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Hey guys,

Thought I might post about my HTC EVO Back-lit speaker mod and other things done to my phone physically.

My Blog does show it best:
http://doesitpew.blogspot.com/2011/0...nd-one-of.html

However, here are the Pics of the Speaker Mod!




You can see that now my phone has a Back-lit Speaker port! This is made using a PCB using a simple Resistor/LED serial connection. For those without aa thicker cover, this is still possible because the LED circuit is the same size as the speaker port (though it will muffle with a normal back) or you can put it in the back area of the headphone port.


My reason for this is I am a girl, so I put my phone in my purse when moving about. DO YOU KNOW HOW IMPOSSIBLE IT IS TO FIND YOUR PHONE IN A DARK PURSE? This solves that without being too bright. Also, do not worry as it uses almost no battery and will continue to shine, even if the phone does not have enough voltage to run as this needs only 2.0v to have full illumination! Also, doe not violate the warranty as you do not have to crack open the phone to install, just wrap the wire around the spring loaded battery connections! To connect, just use the FAR RIGHT AND FAR LEFT of the 4 pins, otherwise your phone will get very angry with you and will not charge. Tape is used to diffuse the light.



The red is the base plastic of the phone (used to be covered with black rubberized paint). This has been initially removed by using the back of a razor blade and then finished with plastic polish using a dremel.
Finally finished off with a $7 shipped eBay extended battery with cover.
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11th March 2011, 03:42 AM |#2  
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Nice work!

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11th March 2011, 02:26 PM |#3  
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ok, but why in the hell would you need a backlit speaker? edit: i see now that i read your whole post.

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12th March 2011, 03:33 AM |#4  
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Its cosmetic and slightly functional. great for those of us with shallow pockets and dark couches!
12th March 2011, 06:26 AM |#5  
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Kinda cool. Checked out your blog. Some nice engineering and creativity on there. Love the Link and Kirby post-it art.
13th March 2011, 05:16 PM |#6  
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Niiiiiiiiice !!!!!

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14th March 2011, 12:33 AM |#7  
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Quote:
Originally Posted by Childofthehorn

Hey guys,

Thought I might post about my HTC EVO Back-lit speaker mod and other things done to my phone physically.

My Blog does show it best:
http://doesitpew.blogspot.com/2011/0...nd-one-of.html

However, here are the Pics of the Speaker Mod!




You can see that now my phone has a Back-lit Speaker port! This is made using a PCB using a simple Resistor/LED serial connection. For those without aa thicker cover, this is still possible because the LED circuit is the same size as the speaker port (though it will muffle with a normal back) or you can put it in the back area of the headphone port.


My reason for this is I am a girl, so I put my phone in my purse when moving about. DO YOU KNOW HOW IMPOSSIBLE IT IS TO FIND YOUR PHONE IN A DARK PURSE? This solves that without being too bright. Also, do not worry as it uses almost no battery and will continue to shine, even if the phone does not have enough voltage to run as this needs only 2.0v to have full illumination! Also, doe not violate the warranty as you do not have to crack open the phone to install, just wrap the wire around the spring loaded battery connections! To connect, just use the FAR RIGHT AND FAR LEFT of the 4 pins, otherwise your phone will get very angry with you and will not charge. Tape is used to diffuse the light.



The red is the base plastic of the phone (used to be covered with black rubberized paint). This has been initially removed by using the back of a razor blade and then finished with plastic polish using a dremel.
Finally finished off with a $7 shipped eBay extended battery with cover.

i notice u have one of those ebay batteries. how is it working for u?
14th March 2011, 04:57 AM |#8  
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Cheap Battery that does a good extra two and a half above stock out of the box. great deal
14th March 2011, 05:44 AM |#9  
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you're my kinda girl ;]
14th March 2011, 01:19 PM |#10  
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Cool mod.
Use your handy dandy DMM to check polarity & voltages?
14th March 2011, 04:56 PM |#11  
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On the battery or the LED?

Basically, the battery will keep the phone on from a peak of 4.2V and low of about 3.3-3.4 depending on what your setup is. Now, where the led is hooked up is after the battery charging circuit that brings down the voltage to 4.0-4.2V from 5V (again depending on if you have 002 hardware or later versions). That means that this battery will essentially show the same brightness from 3-4Volts and my choice of resistor for this was 103ohm as it was not too bright, but bright enough. The light will show down to 2V with decent brightness, at the limits of the discharge circuitry in your battery (stock cuts itself, the chinese ones do not and do allow overcharging).


You do not need a DMM or Scope for this (even though I love my DSO Nano V2, always in my purse for when I need it!)

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