Questions tagged [smartphones]
The smartphones tag has no usage guidance.
48
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How/where can we use/have camera modules similar to those of smart phones [closed]
Many laboratory or embedded systems projects can leverage cameras similar to those of smartphones because of their size and geometry in general.
But the problem is we cannot just take out the camera ...
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Do all smartphone displays use same protocol (Mipi) for display driving?
I thought of implementing a tool for capturing display signal over smarthphones with broken LCD. The idea is to open a smartphone and intercept the signal transimitted over the display using a ...
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What to set on Android/Windows laptop if I want to make them as slave?
I would like to control my Android smartphone/tablet or my Windows laptop using another Android/laptop or Arduino with HC-05 module. I want to control, such as, their volume, camera, microphone, and ...
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How can I reduce the output voltage in a simple way?
I want to connect my old smartphone (Galaxy S4) directly to a charger without battery.
I want to connect plus and minus pins, so I need 3.8 V input, but the charger gives 5 V.
What is the best and ...
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What's the p3 plug (audio) of smartphone safe volt/amper limits (to use as a communication way with microcontroller)? [closed]
And with has some problem in use it without do "waves", I want to serialize data from microcontroler to smartphone like (-1 as inferior limit of tension, +1 as superior limit):
+1 (digital 1)...
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Is it possible to transfer provider from one SIM card to another? [closed]
Is it possible to overwrite (migrate) provider info and details from one SIM card into another SIM card (not blank, but another working SIM card), so, when I insert that new card, the phone could ...
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Circuit board inside a charging cable
I am looking for help identifying a circuit board found inside one of the ends of a charging cable that mysteriously showed up on the desk in my home office. The board has the following stamped on it:
...
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Are smartphone cells actually charged with 9V using QC and other techniques or does the smartphone always step down the voltage?
I'm having this disagreement with a good friend of mine regarding charging voltage of the cells inside modern smartphones when quick charge, USB PPS and other techniques are used.
Let's take as an ...
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Can you power a smartphone (no battery at all) by a power supply alone?
I have a project in mind, where I need alot of parts that quickly would make this project really expensive.
Then I thought that, all the parts I need is already in a smartphone, but I don't need a ...
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Is it possible to use an adjustable power supply as a smart phone charger? [closed]
At times I want to leave my phone plugged in while keeping the battery below a specific charge level, e.g. 80%. The purpose is to increase the lifespan of the Li-ion battery.
Assuming 80% corresponds ...
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Why many smartphones cannot be used without a battery?
My quest started with wanting to know if it is ok to keep phone plugged in. I've read https://www.quora.com/Is-it-true-that-using-your-smartphone-while-charging-it-destroy-your-battery-power-over-the-...
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Can I syphon power from a USB-C smartphone and still charge the phone?
I'm designing a device (simple 5V LED) that will be powered by a smartphone (via the USB C socket). I am struggling with allowing the phone to be charged at the same time via the same connection.
Is ...
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Type-c device for smartphone with optional charging
I've been challenged to "make" an accessory around this gps module. The idea being to receive the GPS through the serial port emulated into the phone whilst being able to optionally power ...
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Plug an Android phone into a USB sound card using a 4-poles 3.5 mm cable [closed]
I thought that it can be helpful for other people that are doing testing on mobile devices these days, so I would like to know if one can plug an Android phone into a USB sound card using a 4-poles 3....
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Is it possible to use a Smartphone audio jack as MIDI output?
Is it possible to use a Smartphone audio jack as MIDI output?
My plan is to use a standard TRS to MIDI cable, like the one Arturias Beatstep uses, to connect a Smartphone/Tablet to a MIDI device.
I ...
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Replaced battery on Galaxy s8 still gets recognized as 3Ah [closed]
My Galaxy S8's battery after 2 years is almost a brick.
I deceided to solder a 10Ah battery in the back (yeah the phone looks like a bomb now) because I want to create a cover which contains a battery ...
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How to estimate Li-ion battery health for an unused smartphone? [closed]
I am considering purchasing a new smartphone that is several years old and could use a little electrical engineering help from the EE geniuses here.
I've performed quite a bit of research, and found ...
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Galvanic isolation of phone chargers
I have seen a video on the web where a person is testing the galvanic isolation of several phone chargers. I am talking about this kind of phone charger.
They are plugged into the wall with no ...
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Will using the positive end of an AA battery to touch my phone screen damage my phone? [closed]
I'm playing a game where it will be helpful to hold down a button for an extended period of time. I didn't have a stylus, so I looked online for any ideas. Lots of people said to use the negative end ...
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Project ARA electrical connectors
Looking at conventional smartphone flat flex cable connections, there looks to be a great deal more conducting pins/contacts than on these Project ARA models - Increasing the size of these connections ...
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Interpolation method for downsampling smartphone sensor data
I have a dataset containing lot of sensor measurements on Android smartphones, namely accelerometer, gyroscope and light sensor. The light sensor was sampled at a rate of 4 Hz and the accelerometer ...
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Help identifying surface mounted component
While replacing the damaged screen on my wife’s Pixel 3a, I damaged one of the blue components below the FPC connector that connects the LCD assembly to the main board.
Can someone tell me what these ...
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Is that possible to modify and connect a dead smartphone camera to a PC using USB cable? [closed]
There are many videos on YouTube that explains how to use camera of a dead smartphone and connect it to phone by USB-OTG. However I want to know
Is that possible to modify and connect a dead ...
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Use smartphone fingerprint sensor with MCU
With the rise of fingerprint sensors on smartphones, one could only wonder, is there a way to re purpose them to use with a MCU. They are fairly accurate and very cheap. LG G6 sensor
I noticed most ...
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Using a "Normal" powerbank for a "Super Fast Charging" phone, are there any potential damages?
I have an Anker Redux 10000 mAh powerbank and a Samsung Note 10 Lite smartphone.
My powerbank is capable of providing an output of 5V ⎓ 2.4A, with only "normal" charging mode (no QuickCharge or other ...
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Why aren't antenna signals inside smartphones stopped by the metal case?
Our smartphones or other device are surrounded by metal, yet there are plenty of antennas inside it (NFC, 4G, Bluetooth, ...).
How can it work ? Isn't the metal supposed to block RF signals ?
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How to make a phone think it has a battery on it and run it from a charger
Im trying to run a samsung galaxy s7 edge without a battery on it but it just turn on shows a logo and then turns off again i think it knows that there is not a battery inside so if anyone knows what ...
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Beginner questions on some SMD components in phone motherboard
I'm trying to understand smartphone motherboard components and have a few questions that might be easy for some of you to answer. Please refer to the attached image for the question numbers:
Are ...
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Can hardware damage cause a computer (or a smartphone) to make miscalculations or logical errors?
I want to put an example.
If I have a motherboard, some elements dropped (such as capacitance or resistance）. When I install it into a computer, it can pass Power on Self Test and successfully launch ...
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How to reconnect to potential of ripped off solder pad without visible circuit traces
I am trying to get a data backup from a broken LG/Google Nexus 5 smartphone. It was repeating in a boot loop, because the on-switch was stuck at always on.
I dismantled the mainboard. Here is a ...
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Display power consumption ratio of smartphones and smart watches
What is the most power-consuming part of your smartphone or smartwatch display? Or is it cpu? Naturally I think that it will change depending on the situation, but general use is assumed.
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Why an 8kHz notch on the headset mic input of a Qualcomm WCD9330?
I have here a smartphone which uses a Qualcomm WCD9330 audio codec IC. (Itʼs a Galaxy Note 4.) Iʼve discovered through testing that the headset microphone input exhibits a roughly 10dB notch in its ...
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How do I trigger capacitive touch screen electronically (without hands)? [duplicate]
I would like to trigger a "touch" or "touches" to a smartphone screen electronically without actually touching the screen with my finger using a remote control somehow.
The idea would be that every ...
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Smartphone battery: safe for (further) use? [closed]
I disassembled my smartphone, which required removing the (non-removable) battery. The battery was glued with double-sided adhesive tape to some housing on the board. Further, there was some 'metallic'...
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Can I connect an Android smartphone to an Arduino Uno? [closed]
I'd like to connect my main Android smartphone (it's a ZTE Blade X) to my Arduino Uno. My main reason is I'd like to use the camera on my phone as a sensor for the Arduino, for various projects.
Is ...
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assited gps vs differential gnss [closed]
i am writing as essay evaulating accuracy of smart phone gnsss for GIS data collection
for part of the essay i thougt it appropriate to mention DGNSS and Assisted GNSS. So far i understand Assited ...
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Extend smartphone camera outside the device
For a project, I would like to move the camera of a smartphone (Honor 7 in my case) ouside of the device by an extension of some sort.
I have determined that the connectors have a pitch of 0.4mm. The ...
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What is typical interface for WLAN chipset on a modern smartphone?
Taking into account nowadays Android smartphones support WiFi 802.11ac, what interface is being used for interconnecting of WLAN chipset with Application CPU? Is it SPI or some other? Is it OK to ...
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NFC/RFID device sending URL to NFC-enabled smartphone at 20-30cm
I am very new to this so please bear with me.
I have read many questions but I haven't quite found a suitable one for what I would like to do.
I would need a NFC/HF RFID device able to send an URL to ...
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What do smartphone manufacturers do differently with their cameras than the Raspberry Pi module camera
There is a huge difference in quality between the image/video taken by the latest iPhone or Samsung smartphone compared to that taken by the Raspberry Pi camera module. What is different about the ...
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Does a 3rd-Party Cable cause any harm when charging your Phone with the original Power Brick? [closed]
When using the original Power Brick the Smartphone came with to charge it, does a 3rd-Party cable cause any harm to the device or is there no difference to using the original cable?
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How can I measure my smartphone transmitted power? [closed]
I was wondering if I can measure my phone's transmitted power with an SDR by tunning in the transmission bandwidth but then, I'm not sure how to know whether this power is coming out of my phone or it'...
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Smartphone internal charging circuit type and efficiency
USB usually provides 5V (or even more, for example 9V with Qualcomm Quickcharge) and the phones contain a single li-ion cell with 3.5-4.3V, so there must be some dc-dc converter in between.
I wonder ...
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Cheap Low Power Signal Transmission To Smartphone
For my university project I'm making a certain sensor which has to (one-way) communicate with a smartphone. The sensor needs to be as cheap/simple as possible (aiming at +- €0,50 in total) and only ...
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Extend USB ports on a smart phone
I want to connect a microcontroller to my smartphone through its(smartphone) only available micro USB port, and at the same time enable charging and data sync capability of the phone with the PC or ...
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4Channel Smartphone Charger 5V 25A [duplicate]
I wanted to experiment a Smartphone Fast Charger. My source would 5V 25A, and output would be in 4 channels, all in parallel. Would that be safe to charge a smartphone?
If no, what can I use to bring ...
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AMOLED display vs. LCD display: Power consumption when displaying white only?
LCD's power consumption only depends on the screen brightness setting, not on the displayed content, unlike AMOLED, where brighter colours (towards white) cause more power consumption, while black ...
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Nexus 6P FPC connector
What is the importance of this metal edge of my Nexus 6P fpc connector?
I broke one of the two, would anything be affected?
Is there a name for this piece?
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