I want to add a custom LED light to my Motorola Xoom, i just need to know where i can solder the LED so that it will turn on when i turn on the screen.
Purpose?
Sent from my HD2 using XDA App
Make the motorola symbol light up red
Sent from my MB855 using XDA App
Yap, so a single red smd led will do the thing. Will take about 10-20 ma current. You can do it. And want to do it when ever LCD lights up? But I have a personal openion, if u use it in dark, it may cause a distraction.
But instead u may loop a connection from some status indicator led( like those when light up when SMS/ misscall/ charging occurs) that will be a bettr option.
And if u want it ur way, then diss assemble ur phone, disconnect ur LCD,and some where on ur LCD strip, u may find a seperate 2/3 wire connection that goes to LCD backlight, loop out a connection from it( u may loop it from the main board if u can trace the track, it will be better than soldering wires on delicate LCD connector,which will be too risky,and need high precession and practice) then connect the positive point to the base of an npn transistor( smd type will be more suitable,) and connect the collector to the negative of the installing led, connect the positive of the led via 100 ohms( in case ur battery is 3.7v ,else if the voltage is higher u need high value resistor upto 1k but not higher) resistor to the positive of the battery terminal, then connect the emitter of the npn transistor to negative of battery.
If u r not so sound to electronics this may seem too complicated to you, but it is used for the fact that connecting an extra led directly to the LCD backlight led terminals will not dim ur LCD light.
Another option is to directly solder an led to ur soft touch/ hardware button illuminator leds( a slight decrease in light o/p of those led will occur, but it will not cause that much noticeable change. But if it occurs u may use the transistor method).
Hope it may helped u.
from hd2 running hyperdroid 5.7 on dorimanx 3.8
Yeah, I was thinking of hooking it in to the notification light for that reason, so when I get some money and free time ill do it and post pics on here. Thanks
Sent from my MB855 using XDA App
Dude its not a money problem. U may have to spend less than ten bucks for it. It will cost in between 1-5 $ Max. All u need is patience and time.
from hd2 running hyperdroid 5.7 on dorimanx 3.8
Just two tips coming from experience: keep the wires short and use flux.
Squeck94 said:
Just two tips coming from experience: keep the wires short and use flux.
Click to expand...
Click to collapse
Use white flux, and not yellow, will help u to reduce stain and keep led clean
Sent from my HTC HD2 using XDA App
Cool idea, let us know how it turns out.
good mod for may xoom....
thanks
Related
iam experiencing a electric shock or tingling effect from the body of my htc legend when charging.it goes of when i pick it up.upon placing it on some surface the same effect returns.iam a new one here,is it a faulty handset.it is there only when charging. please help
I'm pretty sure its a bad handset, a connector for charging the battery is exposed and touching the aluminum casing.
Sent from my Legend using XDA App
Your power source are not properly grounded.
its nt there when charging from my laptop
Your laptop only charges at half the rate of the AC adapter, it probably still is putting current through the aluminum case, but you don't feel it.
marclh1992 said:
I'm pretty sure its a bad handset, a connector for charging the battery is exposed and touching the aluminum casing.
Sent from my Legend using XDA App
Click to expand...
Click to collapse
how is that possible.im afraid
driftcat said:
its nt there when charging from my laptop
Click to expand...
Click to collapse
Well, thats because I had similar experience. I used to connect my phone to my laptop with AC adaptor (faulty battery) till one day when it was a goner, I bought a new slim OEM version which do not come with ground (2pin vs 3pin with grounding on stock adapter). Ever since, I have had electric shock whenever Im connecting to my laptop.
I have gotten electric shock when using the stock charger as well. The old wiring at my in-laws house probably the cause for it. It was okay at home.
andrekua said:
Well, thats because I had similar experience. I used to connect my phone to my laptop with AC adaptor (faulty battery) till one day when it was a goner, I bought a new slim OEM version which do not come with ground (2pin vs 3pin with grounding on stock adapter). Ever since, I have had electric shock whenever Im connecting to my laptop.
I have gotten electric shock when using the stock charger as well. The old wiring at my in-laws house probably the cause for it. It was okay at home.
Click to expand...
Click to collapse
Sent from my HTC Legend using XDA App
So u r saying my phone is at fault or the wiring
TL;DR, replace the handset.
Is anybody having the same fault.place the handset on a surface when plugged in to the power and rub Ur finger on to the metal part of Ur legend.
Members please see for urself.
Sent from my HTC Legend using XDA App
"iam experiencing a electric shock or tingling effect from the body of my htc legend when charging.it goes of when i pick it up.upon placing it on some surface the same effect returns.iam a new one here,is it a faulty handset.it is there only when charging. please help"
Are you sure you bought an HTC Legend? Are you sure it's not a defibrillator?
Your phone is just fine, don't worry. The effect your are feeling on your skin is caused by the charger and has nothing to to with the phone. There are some unqualified posts in this thread (e.g. problem with wiring, charging current) which should best be ignored.
To the effect itself. The charger isolates the mains power from the secondary power through the use of a transformer. Also our new small power supplies work with transformers, but operate them at a higher frequency (sometimes audible) after the main power has been rectified. But the power supplies represent also an electric capacity, and therefore the secondary output may charge up relative to ground. But this capacity is so small, that you may feel a voltage on your skin but there is no risk whatsoever. By the way, the back of the finger is very sensitive. Try to move it along metallic surfaces of other device (e.g. desk lamp) and you may fell the electric potential. The only way to completely avoid this is to use a grounded power supply, like some used to charge laptops.
Markus
yep. use groundod power supply. i have this thing when charging from my laptop and the laptop adapter is not properly grounded.
dont worry, its normal and negligible.
nethopper said:
Your phone is just fine, don't worry. The effect your are feeling on your skin is caused by the charger and has nothing to to with the phone. There are some unqualified posts in this thread (e.g. problem with wiring, charging current) which should best be ignored.
To the effect itself. The charger isolates the mains power from the secondary power through the use of a transformer. Also our new small power supplies work with transformers, but operate them at a higher frequency (sometimes audible) after the main power has been rectified. But the power supplies represent also an electric capacity, and therefore the secondary output may charge up relative to ground. But this capacity is so small, that you may feel a voltage on your skin but there is no risk whatsoever. By the way, the back of the finger is very sensitive. Try to move it along metallic surfaces of other device (e.g. desk lamp) and you may fell the electric potential. The only way to completely avoid this is to use a grounded power supply, like some used to charge laptops.
Markus
Click to expand...
Click to collapse
i contacted htc support.the person over there asked me to bring the handset to the service center.r u saying i should not take it there,and avoid the whole thing
driftcat said:
i contacted htc support.the person over there asked me to bring the handset to the service center.r u saying i should not take it there,and avoid the whole thing
Click to expand...
Click to collapse
Yes, keep your Legend and enjoy it...
If i had this problem i would most likely first try an other power adapter
if the problem is gone fine!!!
if not then i would send it to HTC service
I had the same problem for a while, changed the charger cable (Micro USB to USB-A bit) and it fixed it
Oh the comment about a difibrilator..........Nice!!
Mike
I have seen a few posts on here about a dead battery while stuck soft bricked so the phone won't take a flash, do this at your own risk but if you take a standard USB cable and leave the end to plug in the computer and cut off the other side you will have 4 wires only worry about the red and the black tape the others off just strip the insulation off the red and tape to the connection on the battery labeled plus and strip the black back and tape to negative and then plug in the USB side into a PC, after about 10 minutes you will have enough to flash, be carfull and watch that the battery is not getting hot. Sorry for all the typos and poor grammar its late and I'm posting from my phone
Sent from my MB860 using XDA App
spiderjerusalem said:
I have seen a few posts on here about a dead battery while stuck soft bricked so the phone won't take a flash, do this at your own risk but if you take a standard USB cable and leave the end to plug in the computer and cut off the other side you will have 4 wires only worry about the red and the black tape the others off just strip the insulation off the red and tape to the connection on the battery labeled plus and strip the black back and tape to negative and then plug in the USB side into a PC, after about 10 minutes you will have enough to flash, be carfull and watch that the battery is not getting hot. Sorry for all the typos and poor grammar its late and I'm posting from my phone
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
Thanks, that's a good idea
Sent from my MB860 using XDA Premium App
Moved to correct forum.
Sorry about the wrong forum section. Just to add you don't want to do this too long as the voltage is probably not regulated properly for the battery so its not good for it but it will get you out of a brick in a pinch.
Sent from my MB860 using XDA App
spiderjerusalem said:
I have seen a few posts on here about a dead battery while stuck soft bricked so the phone won't take a flash, do this at your own risk but if you take a standard USB cable and leave the end to plug in the computer and cut off the other side you will have 4 wires only worry about the red and the black tape the others off just strip the insulation off the red and tape to the connection on the battery labeled plus and strip the black back and tape to negative and then plug in the USB side into a PC, after about 10 minutes you will have enough to flash, be carfull and watch that the battery is not getting hot. Sorry for all the typos and poor grammar its late and I'm posting from my phone
Sent from my MB860 using XDA App
Click to expand...
Click to collapse
I ran into this issue on the Motorola Photon 4g. I've followed your directions, but I am not sure it is charging. After about 20 minutes, I placed the battery back in the phone and it still said battery was too low to flash. So I've stripped the red and black shielding to expose the copper and I'm trying direct contact into the battery + and - slots now. Do you have any suggestions?
leetcharmer said:
I ran into this issue on the Motorola Photon 4g. I've followed your directions, but I am not sure it is charging. After about 20 minutes, I placed the battery back in the phone and it still said battery was too low to flash. So I've stripped the red and black shielding to expose the copper and I'm trying direct contact into the battery + and - slots now. Do you have any suggestions?
Click to expand...
Click to collapse
Did you honestly try charging through the wire insulation? Electricity travels through the copper wire, not the protective insulation. Also the power flow is regulated before reaching the USB cord, proof is in taking your wall AC charger usb and plugging it into a computer, you get different voltage outputs (meaning it takes longer to charge on comp USB).
Sent from my MB860 using xda premium
Sass86 said:
Did you honestly try charging through the wire insulation? Electricity travels through the copper wire, not the protective insulation. Also the power flow is regulated before reaching the USB cord, proof is in taking your wall AC charger usb and plugging it into a computer, you get different voltage outputs (meaning it takes longer to charge on comp USB).
Sent from my MB860 using xda premium
Click to expand...
Click to collapse
It seems to be working now that the copper is directly hitting the battery. Thanks for your confirmation ;p. It's charging on the USB AC wall charger now. Is it preferred to be done through the computer USB to regulate the voltage?
It worked! I'm back in business now! Thanks for all the help
Does it have to be an Atrix 4G or can I follow this method for a Galaxy Note. Also can you use any usb cable... (eg. usb to micro-usb, usb to mini usb)?
tangelos said:
Does it have to be an Atrix 4G or can I follow this method for a Galaxy Note. Also can you use any usb cable... (eg. usb to micro-usb, usb to mini usb)?
Click to expand...
Click to collapse
i would think you can use it for any battery, just make sure you have the red on the + terminal and the black on the - terminal of the battery... just like charging a car battery, just on a smaller scale!
totally not worth cutting up a cable to do this by a universal battery charger from amazon.com for a penny +5.00 shipping
thats a total of 5.01 thats less than the cost of your usb cable
Sent from my MB860 using Tapatalk
Sorry I did not realize this thread was still getting views, it does work for every battery i have tried it for so far, I would not cut up a cable for no reason but if you brick it at midnight and don't wanna wait for shipping from amazon it will get you running again, besides I am sure most of us on here have plenty micro sd cables around. I have used this on my droid bionic with success recently.
I modified my Galaxy Note to use inductive charging via a palm touchstone / patch.
Just a quick note. Not a whole lot to contribute here, because I largely followed the examples of the Qian Qi. That guy is awesome.
I don't think I voided a warranty, either. Only minimal teardown required (black plastic back, then the speaker section). Never came across a sticker I had to remove....
Useful links:
galaxy s inductive charging mod
evo 4g induction charging mod
galaxy note teardown video
galaxy note teardown pics
Notes:
- Buy a good soldering iron. Weller WESD51, set to 610 deg F, with 1/32" long conical tip, with lots of flux and lots of flux remover are the only reason I could do this. I can't stress enough the value of having good temperature control, knowledge of temperature, and so forth. I stumbled around with an "ordinary" soldering iron for a long time, and in hindsite, I can't believe I did so.
- Do not choke on the price. I already had a lot of soldering gear, and I bought $220 more. Spend the money. It's worth it.
- Watch the curious inventor youtube videos on soldering. This guy. Watch everything, several times. http://store.curiousinventor.com/
- You want 30 gauge wire. It's the only thing that just barely can be crammed in. I used the "Kynar" coated type. Buy at least 2 colors.
- as you look at the phone disassembled, with speaker on the bottom left, the +5 pin on the micro usb (MHL) port is the leftmost. I attached a wire to that, and a ground wire to the housing where the port was soldered.
- routed the wires under the speaker, then back, then into a VERY slight indentation into the battery compartment. used a blue "safe open" tool to help shape the wire / crimp ends. Once in the battery compartment, you're golden. Attach the inductive charging coil to the back of the samsung plastic back, add solder to the pads, and attach the wires.
- Attached is a picture with roughly how I routed wires. Red is +5V, Blue is ground. Be sure and double check if my recollection is right where the indentation is into the battery compartment. (that part is by memory).
- dont leave too much slack. it's really hard to get the samsung black pastic panel back on. Mine very slightly bulges.
- be careful where you put the charging sticky patch, because this phone is a little bit bigger than a palm pre. You have to consider if the phone can sit on the charger and "lock in" with the magnets. If you place it too high, it actually can't (in portrait)!
- Qian Qi had a really interesting point: most articles about how Li-ion batteries behave are wrong, and fully discharging the battery drastically reduces the number of cycles you have. So this is actually a very useful mod--whenever you don't use the phone, toss it on the charger.
Thanks for summing it up! Was actually thinking of doing this mod myself. Question: do you have a protective case on your Note? If so - what kind and how badly does it affect the magnetic properties?
No case. Especially because the note is so big, I think it would be unmanageable.
I took the samsung thin plastic back, and placed the Palm PRE (with charging coil still attached) on top of it, on the touchstone -- to figure out proper placement & mark with a pencil. I noticed a buzzing sound, coming from (I think) the induction coil on the palm pre back itself. I suspect if you use a case, this wont work well.
Also, the size/weight/placement of the galaxy note are such that the magnets are just barely strong enough to hold it. One time my phone was near, but off, the charger. I'm not sure if vibration from the phone did that, or my kids
In summary, I'm not sure how well it would work with a case. You might be able to research this on the net; among the 15 or 20 people that have bought a Pre, you might be able to find some info about the effect of a case on inductive charging.
tight squeeze?
im wanting to try this mod i have my touchstone on the way not thank you amazon but it seems like to me that the pad from the pre wouldnt fit under the cover of our phablet =/ could you post pics of the finished product and i think this is the only instance that i have seen someone attempt this with the note and i want to try it i love my note but would love it even more with inductive charging.
I am not the original author but I performed a different Touchstone mod and posted pics here:
http://forums.androidcentral.com/sa...1-galaxy-note-touchstone-mod-photo-heavy.html
Hope it helps!
-darren
Sent from my GT-N7000 using Tapatalk 2
Thank you!!!
Thank you so much for your post I have my materials on the way but I hadn't seen a detailed guide for the note other than this one and was worried I would have to solder directly to the usb pins which looked scary lol I did have two questions though would your mod work the same way for the at&t note? Specifically the points where you soldered to the phone and can wireless charging be performed through a case?
Hey, OP here. You may want to hold off just a bit. Mine is exhibiting some issues now. As in, it says "charging" but it doesn't do so wirelessly. The phone will stay "charging" but the battery % never goes up. (It was slow before, but would charge fully over a night).
Charging via USB still works.
It may be something simple; I'm not sure. But I need to crack it open and take a peek, and I haven't had time to do that yet because my phone is functional at the moment.
If nothing has conspicuously changed, there may be something about the design that isn't sustainable. Or maybe my solder joint halfway broke, or one of the wires got smashed enough so that it's partially broken...
I'll write back with my findings. Bug me if I don't
Thanks for the notice I was about to pull the trigger lol tbh I probably shouldn't attempt this I've never done a mod like this before and I'm not exactly a surgeon with a soldering iron lolvthatvbeing being said I'm going to attempt this on an old evo 4g I have before I do surgery on my baby lol plus I'm already familiar with the guts of an evo from screen repairs ill report back with my results
Sent from my SAMSUNG-SGH-I717 using xda premium
Success it took some doing but I got it I haven't done the mod on my note yet but I did it on my evo last night and it works its rough I haven't cleaned it up yet but I'll post the pics I got this mod from www.goodandevo.net
Sent from my SAMSUNG-SGH-I717 using xda premium
Thank you for this post.
Sent from my SAMSUNG-SGH-I717 using Tapatalk
No prob I just wanted to see if i could do it and if I can do it with little soldering experience I'm sure most could do it I haven't done this mod to my galaxy note though as there is way less room in its a far more complicated mod than the evo because you have to make room for wires in a device samsung made as thin as possible and the way you have to route the wires I feel like the solder joints would just break
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
For those who want to try this out but still have warrantee just buy a backcover, a micro usb plug and assemble it according to the directions here.If you need the note just take out the usb plug and the back cover and you're good to go.... Or leave it there.....
For those who don't know what pins to use on the usb plug:
Pin: 1 is 5V+ (red)
Pin: 5 is GND (black)
Works like a charm.......
becosemsaida
Cool mod! Does it affect the stylus operation though?
pboesboes said:
Cool mod! Does it affect the stylus operation though?
Click to expand...
Click to collapse
yes it affects the stylus sometimes it reacts with delay and sometimes it clicks although only hovers over it
pboesboes said:
Cool mod! Does it affect the stylus operation though?
Click to expand...
Click to collapse
I was not a big stylus user; I can't stand the input lag. I didn't notice a difference, but I always considered the input speed unacceptable. Not sure why there would be any difference, anyway.
My big problem that I've never taken the time to address is that after some time, it's as though I can't pull enough current through the wires to charge. One day I need to crack this open & figure out why.
gr8 n interesting post
wonder how fast can a full charge be completed
regards
strategist99 said:
gr8 n interesting post
wonder how fast can a full charge be completed
regards
Click to expand...
Click to collapse
It is slower than normal, but completed in a night. I still have not dismantled my phone to attempt to repair this, but I want to soon
Hi,
I want to make a portable charger for my phone using:
1 LM7805,
1 capacitor to filter out high frequency noise,
1 slide switch ON / OFF,
1 status LED,
1 resistor
1 12-volt battery.
What do you think?
Will it work or will ruin the phone battery?
nice modding info...
I have one question.. can I change the IC regulator with AN its not LM .. (what mean LM) ? ... tanx before
Well, i don't even know if this circuit works. The lm7805 is a voltage regulator, 5v out
Sent from my Xperia Sola using XDA Premium HD
aymiu cloack
god modding
Not a bad idea, but the 7805 is a linear regulator.
With 12V in you will be wasting 58% of the energy.
100%-(5V/12V)=58%
You want a switching regulator.
In some ways the easiest thing is to just buy a car cigarette lighter charger,
take the case off and solder a battery directly to the circuit board.
Or you could use something like this on ebay:
http://www.ebay.com/itm/DC-to-DC-Co...215?pt=LH_DefaultDomain_0&hash=item3cd0dba49f
Look further, this was just the first thing that I found off-hand.
andriboy923 said:
nice modding info...
I have one question.. can I change the IC regulator with AN its not LM .. (what mean LM) ? ... tanx before
Click to expand...
Click to collapse
Yes you can use,,, this AN/LM gives us the information abt the manufacturing material.
But LM7805 is a good quality material...
Nice :thumbup:
guba91 said:
Hi,
I want to make a portable charger for my phone using:
1 LM7805,
1 capacitor to filter out high frequency noise,
1 slide switch ON / OFF,
1 status LED,
1 resistor
1 12-volt battery.
What do you think?
Will it work or will ruin the phone battery?
Click to expand...
Click to collapse
As another posted said, you would be wasting over half the input power as heat - which means that the LM7805 will heat up like mad, so hot it can easily burn your fingers. This is due to the drop-out voltage being too high (Vout-Vin). One way to overcome this is to use an input transformer to step down the voltage from 12V to around 5V. (Keep in mind that the input voltage must always be around 1.25V higher than the output voltage though!)
And then add a heatsink to the 7805 too of course.
Then it should work. (I would also add an input diode for reverse polarity protection, for good measure.)
Hope this helps :good:
thanks for info
thanks bro
guba91 said:
Hi,
I want to make a portable charger for my phone using:
1 LM7805,
1 capacitor to filter out high frequency noise,
1 slide switch ON / OFF,
1 status LED,
1 resistor
1 12-volt battery.
What do you think?
Will it work or will ruin the phone battery?
Click to expand...
Click to collapse
what brands are good to buy, i read several times that other power banks as they are called cause an overpower and may damage the phone
Physiotherapist said:
what brands are good to buy, i read several times that other power banks as they are called cause an overpower and may damage the phone
Click to expand...
Click to collapse
The whole thread is about building your own (USB phone) charger, not at any point were commercial products mentioned FYI.
Hello, I'm new to the forum, but I thought that if someone would know this its people in this forum, so the problem is that my nexus 4 is not able to charge. It gets all the red light things etc. i tried most of the stuff recommended here in the forums, non helped so I decided it could be hardware related and since I have no warranty left I opened it up. After testing many possible problems and checking stuff suggested in the service manual I found out the problem: The battery is at about 2,3V now, the charger itself provides 5V, but only 2V of energy comes to the battery when charging. I mean 3V dissapears on the way to it. I've checked almost every charging spot with the voltage meter and the whole 5 volts go through all the charging connector. Which you can buy on ebay and easily replace.
So it's a very short distance of the board left where the voltage could be disappearing and I can't seem to find where exactly. So if you have any ideas, please help.
carry out a voltage drop test on both positive and negative side to try to isolate the problem
Sent from my Nexus 4 using xda app-developers app
jlk2501 said:
carry out a voltage drop test on both positive and negative side to try to isolate the problem
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
All the voltage testing gave me nothing. So I charged the batter back to 3,8V using external power supply with custom voltage and now when you check the voltage on charging spots on the board most say full 5V or at least 3,6V... But the phone is still not working I reassembled it and tried to turn on but it shows google logo and turns of, if you go to recovery mode it also immediately turns off and if i just leave it on a usb or charger cable it's solid red light... Any ideas?