The mobile tag has no wiki summary.
-2
votes
0answers
37 views
Why would a 3G repeater stop working? [closed]
I recently purchased a 3G repeater identical to this one, for my dad's boss who moved into an area with horrible connectivity (both mobile and wired). The first few months the signal went from 1 or 2 ...
-3
votes
1answer
59 views
i would like to build a sort of mobile [closed]
i would like to build a mobile phone pendent for my little sister
it would only make calls and only to one number
i know of one similar device to what i am looking for: the Burg 5
but i would ...
-3
votes
0answers
32 views
What stores offer the best deals on Mobile Phone Chargers in the UK? [closed]
I am looking to buy several items and so googled for clearance sales going on for these:
Mobile Phone Chargers for 2 Samsung galaxy phones
desktop battery charger
plugtop adapter with dc connector
...
3
votes
2answers
89 views
“Wireless” USB cable, via RF / 3G
I'm looking into the feasibility of a project to develop a USB-over-RF device for physical penetration testing engagements. The idea is that our tester could connect a device to a USB port on a ...
1
vote
0answers
120 views
Does living near a cell tower decrease your overall exposure to RF? [closed]
I understand that my mobile phone will increase its RF levels when it struggles to connect with a cell tower/base station due to distance. Also being nearer a cell tower will increase my exposure to ...
0
votes
1answer
80 views
powering android phone from 3 AA battery directly (not USB!) [closed]
I have Sony Arc phone which was spoiled by me (story OutTopic) as it won't charge lion battery anymore. the phone itself works perfectly. I don't want to do the regular 3AA to USB charger way. Trying ...
-3
votes
1answer
185 views
difference between voice and data services?
What is the difference between the voice and date services. I have read that for voice services T1/E1 frame is used and for data services a frame with a standard header and payload nd tail is used ...
0
votes
3answers
67 views
Mobile AC Power Source for Projector?
I need to use a projector for a presentation (about 30 mins, but I'll need to make it about 3 times), but there will not be any wall outlets available. I thought about using an inverter and a 12/24v ...
2
votes
2answers
120 views
Using an old Bluetooth-enabled Blackberry as a GPS
I have a few Blackberry devices with integrated GPS functionality. Given that the SIM is no longer activated, is it possible to use this device as a second hand GPS unit?
My thought is that I can ...
3
votes
2answers
81 views
Why do mobile phone transmissions come in pulses?
We are all familiar with the phenomenon that mobile phones induce in amplifiers and loudspeakers. The bip bip-da-bip bip-da-bip which happens just before you get a call, or if the phone is just ...
1
vote
3answers
2k views
Is it possible to make a usb charger to power multiple devices?
I was thinking how nice it would be to have a single wall plug with multiple (4-6) USB ports that would be capable of supplying enough power (at 5v) to charge say an iPad, smartphone, bluetooth ...
-3
votes
2answers
209 views
Bluetooth or Direct Mobile, which is more harmful to health? [closed]
Radiation derived from mobile is harmful to health, as I heard of it. So, is it more harmful than that of using mobile/cell phone with blue-tooth device?
3
votes
1answer
585 views
Locate a mobile phone precisely for indoors tracking
Firstly, I don't know if I'm asking this at the right place, so excuse me if it's not.
Suppose i want to track a mobile phone in a local area, lets say a large hall of 200 m x 50 m, using any ...
-1
votes
1answer
865 views
Micro-B USB male to 2x Micro-B USB female Y splitter adapter [closed]
I'm looking for the above mentioned splitter.
It's like this, but Micro-B USB
and like this, but reverse the male/female.
By the way, I was able to use my Samsung Galaxy S3 phone with the Samsung MHL ...
3
votes
1answer
527 views
Need formula to selecting coaxial cable type and GSM antenna
Need formula to selecting coaxial cable type and GSM antenna
I'm using a GSM modem for my application which is often installed at a basement where there is no GSM signal so I will need to attach it ...
5
votes
1answer
1k views
How to make usb 3G modem signal stronger with aluminum foil antenna?
I'm in an area with weak signal reception, but I'd like to make my 3G connection better at very low cost.
I heard using aluminum foil as reflecting surface and placing the modem in some way in front ...
1
vote
1answer
1k views
What is the pinout for HTC One X docks?
I used to have a Motorola Milestone which used magnets to detect car and desktop docks.
I've now got an HTC One X and am looking for dock options. The standard ones look pretty expensive, but there ...
1
vote
4answers
1k views
What kind of SIM are these?
I have a device (XT107) that requires a SIM card. It takes a SIM card that have cobber plate (not sure what to call that) that supports all 8 curcuits on the device.
When speaking with people, some ...
5
votes
3answers
3k views
Do 3G and phone calls(gsm) use the same antenna in a mobile phone?
When I disable "3G or EDGE" (cellular data) connection from my smart phone's settings, I can still make a phone call.
Do phone calls and cellular data use different antennas and frequencies in a ...
0
votes
0answers
94 views
Boosting 3G signal strenghts for mobile phones [closed]
I am given a research about boosting 3G signals for mobile phones. Sometimes as you all might now the 3G signals get weaken dramatically.
I was planning to use an antenna and an amplifier for that. ...
1
vote
1answer
449 views
How can I build a FBus to USB cable?
Is it possible to make FBus to USB?
Does it need any complex circuit?
-2
votes
1answer
220 views
Which chip in this image is the main CPU for the Samsung Galaxy 3
Which chip is the main CPU in this photo?
The image was taken from there. Samsung Galaxy 3
9
votes
2answers
4k views
Why do many laptops run on 19 volts?
Typically mobile devices that have a mains-powered supply will accept voltage that is multiple of some single battery voltage. For example, 4.5 volts is 1.5 volts (AA primary battery) 3 times and 36 ...
0
votes
1answer
150 views
ARM Mini Mobile Device Development [duplicate]
Possible Duplicate:
ARM Processor on a PCB
I'm trying to build a mini device with 3 buttons (that will each preform a task) and it will have an ARM Processor, no screen or form of display, ...
1
vote
1answer
122 views
Any idea on any device which track multiple mobile phones
I'm currently ask to work on a project which I have never worked before.
And I have no freaking idea or its not even in my area of expertice.
Ususally I Google as everyone does. But what is the use ...
0
votes
1answer
173 views
Host (baseband) controller in mobile phone
Hi mobile world I met many times the term "host controller" or "baseband controller" used interchangeably in the context of being the heart of the mobile. What exaclty is that, som SoC with CPU, GPU, ...
2
votes
0answers
151 views
What is the usage of 3rd lead in mobile batteries [duplicate]
Possible Duplicate:
Why we have 3 pins on some batteries?
I'm trying to build (DIY) open charger for mobile battery. I would like to know what is the usage the middle one?
Is there ...
2
votes
1answer
515 views
What Voltage/Current Levels Can I Send Into the Microphone Input on a Mobile Phone?
I have a device that is sending 9600baud using only Tx, Rx, and Gnd.
I am not sure, but I think the voltage is either the 3v or 5v level.
I want to receive that serial data on my mobile phone.
I ...
1
vote
2answers
635 views
building an unlock system with bluetooth and mobile phone using arduino
I want to trigger the completion (connecting) of a circuit.
I want to do this via bluetooth on mobile phone. Setup:
User turns mobile app on
User puts phone near bluetooth reciever connected to ...
1
vote
1answer
125 views
Scan for mobile phones?
I'd like to measure queuing time, similar to what they're doing in Finland. Instead of detecting bluetooth (which is disabled in most phones) I thought of detecting EDGE/3G.
I'd like to log the ...
0
votes
1answer
324 views
Arduino Power On notebook PC
Is it possible to "Power On" notebook PC with Arduino (or with USB keyboard) without pressing notebooks power button ?
Notebook PC is Acer 5720Z.
21
votes
2answers
2k views
How do I make the Fairchild FSA9280/FSA9480/FSA880 BOOT pin trigger? (Samsung Galaxy S)
this is a bit of a long shot but I'm hoping someone has access to the full data sheet for one of the chips listed in the title, and can tell me what combination of VBUS_IN and resistors on ID_CON will ...
7
votes
4answers
961 views
Strategies for mapping an area perimeter with a mobile robot
I'd like to build a bot that when placed in an area would have the ability to find the perimeter of the area and map the obstacles present. Later it should be able to navigate to different parts of ...
1
vote
1answer
376 views
What are the pros and cons of resistive and capacitive touchscreen mobile devices?
I have zeroed it down to these two phones Nokia X6 and Nokia C6.
Apart from others, one difference is the presence of capacitive touchscreen in one and resistive in the other.
If I were to decide ...
5
votes
6answers
483 views
Using LCD's of mobiles?
I was just giving my mother's mobile for repair at my local store and saw the owner stocking parts for them. I saw him stocking cheap (I mean really cheap) LCD (coloured and black & white). I was ...
