Questions tagged [smartphones]

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votes
0answers
29 views

Audio Mixing 2 smart phones [closed]

A simple Circuit for analog audio mixing of 2 or 3 smartphone calls (Mic and stereo audio) so for example phone 1 -Skype , phone 2 -Whatsapp, phone3 -stander call. All 3 participant would have a ...
0
votes
2answers
48 views

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 ...
0
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3answers
151 views

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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0answers
42 views

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 ...
0
votes
1answer
60 views

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 ...
0
votes
1answer
57 views

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 ...
3
votes
0answers
84 views

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 ...
1
vote
1answer
51 views

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.
4
votes
1answer
151 views

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 ...
0
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0answers
100 views

bluetooth 5 interference from other phones interrupts audio (a2dp and hfp)

(I tried to find the best forum to ask this, here seems the best place; please recommend alternative before downvoting) Problem: while listening to music over bluetooth A2DP profile from a gps (zumo ...
1
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0answers
124 views

What are the Bluetooth (low energy) scan settings of smartphones

My challenge: I'm trying to find out the best timings for a complex bluetooth low energy (BLE) system, where a central station shall be able to connect to smartphones (=scanner) as well as to coin-...
4
votes
1answer
163 views

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 ...
0
votes
1answer
72 views

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'...
0
votes
1answer
70 views

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 ...
1
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2answers
49 views

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 ...
0
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1answer
101 views

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 ...
0
votes
1answer
73 views

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 ...
1
vote
1answer
156 views

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 ...
0
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2answers
149 views

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 ...
0
votes
1answer
106 views

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?
0
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1answer
142 views

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'...
0
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2answers
232 views

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 ...
0
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2answers
108 views

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 ...
-1
votes
2answers
181 views

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 ...
1
vote
1answer
38 views

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 ...
0
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0answers
1k views

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 ...
-2
votes
1answer
92 views

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?