Questions tagged [iphone]

Questions about iPhone's hardware and interfacing circuits to iPhone

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1answer
45 views

Solar powered iPhone for remote monitoring

I want to find a way to use a solar panel to power an old iPhone running a single app to continuously collect temperature and humidity data in remotely located beehives. The iPhone must be ...
0
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0answers
31 views

Automatic Headphone Control Issues

A friend wants an automatic headphone controller for his bike. According to the Android spec we should be able to add a bias resistor of 5kohm between mic and ground, short mic to ground for play/...
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0answers
48 views

What is the proximity sensor of the Iphone 11 pro/Max?

I am currently working on an engineering analysis of the latest iPhone 11 pro. Sadly I can not find any information source that can confirm the exact supplier's name for the proximity sensor, since ...
1
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0answers
69 views

iphone 6 plus - Is the resistor R0601 important?

What is the resistor R0601 important for? Can a iphone 6 plus work without it ? What is the meaning of the code (ZQ) in the iphone schematic? Thanks
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1answer
81 views

How to run electricity through metal wire to (safely) act as a stylus?

I’m trying to make a robotic arm draw a lowercase ‘i’ on my iPhone’s drawing app without lifting the stylus. The robot arm bit is another story, my current focus is trying to make a stylus out of a ...
0
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1answer
70 views

Reading data from an iPhone 5 [closed]

A close person got hit by a car and died a few years ago. The persons iPhone flew trough the air. The police was not able to turn it on and mentioned that it would be impossible to collect data from ...
0
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1answer
60 views

Delayed button press

I am working on a headphone circuit that plugs into an iPhone , between the mic wire and the GND wire there is the mic , and a push button , with iPhones when you press the button once it will pause/...
5
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1answer
447 views

Mystery component in Selfie Stick? (iPhone)

What is the component inside an iPhone selfie stick? Testing reveals it is not a transistor. We have done some probing of it and come up with the following: The mystery 3-pinned component drops the ...
0
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2answers
87 views

How does USB port on a power strip detect the optimal current output?

I am looking to buy a power strip with USB ports and came across this one online. The description says "Top-notch USB smart charging technology which can detect and deliver optimal current output up ...
0
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2answers
69 views

How long would the capacitors in an iPhone power adaptor hold potential energy?

I was curious as to whether one could potentially get a shock after touching, with sweaty hands, the prongs of an IPhone power adapter upon unplugging it. If possible, how long would this charge take ...
-4
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1answer
87 views

Would it be energy efficient for phones to include actual GPS chip? [closed]

None of the smartphones today have dedicated GPS chips in them, they only have a GPS capability that stems from byproduct features of the modem chips. Because of that, the GPS capability is very ...
0
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2answers
3k views

How to extract data from an NAND chip with an NAND reader from iphone 6? [closed]

I am not an electrical engineer and I cannot take phones apart. I had an iphone 6 that suffered no water damage, no smashed screens, no dust... but suddenly it got an NAND memory issue. The phone ...
1
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2answers
7k views

How to make the lightning port of iphone output 5V power? like OTG on android phones [closed]

How to make the lightning port of iPhone output 5V power? How to make the lightning port of iPhone output 5V power? Just like the android phone, if I connect the ID pin to the ground then the phone ...
2
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0answers
79 views

Does iphone shock transfer AC or DC current to body? [closed]

Suppose an iphone gave a little jolt when pressing the power button. Is that AC or DC current? The phone was connected to a laptop which was connected to a power outlet.
0
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1answer
349 views

How to connect a spare mobile phone camera to a display and power? [closed]

I have an Apple iPhone front and rear cameras along with its A4 motherboard (yep, I disassembled it) is it possible that I can get a live feed from these camera(s) to a display and connected to a ...
0
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1answer
129 views

Can I add an audio jack to a digital audio board?

Can I use the preamplified audio signal on an iphone only microphone (Tascam iM2) to add an audio jack? There is already a USB 5V input which perhaps powers the preamp, and a volume control where I ...
-1
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2answers
745 views

Charging a phone using Potential Energy

How can i convert the potential energy of a mass into mAh for this reason: How heavy would a mass have to be if I wanted to charge my Iphone (2800mAh) using a apple phone charger (5V 1000mAh). The ...
2
votes
2answers
2k views

problem solving: line level to iphone attenuator buzzing sound

I'm trying to use the mic input on my iPhone to record line level audio. I have made a cable with an attenuator as shown in the picture below. Recording from my macbook pro works like a charm (3,5mm ...
0
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1answer
2k views

Does a rated 5V, 2.1/1A charger provide a constant current? [closed]

I use power banks often to charge my iPhone. The default charger is a 5V/1A charger (which I assume provides constant current). However, the power bank has 2 output ports - able to provide 5V=1A and ...
0
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2answers
156 views

why my laptop can't use wireless charging technology? [closed]

we start to deal with wireless charging technology in recent years with the booming of smart phones why wasn't it possible with laptops? does the smart phone's battery differ from laptop's?
0
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1answer
151 views

Why are some electronics seemingly unbreakable (phones) and others very fragile? [closed]

Specifically I am wondering about the mechanical strength of the surface mount connections in consumer electronics. Are some tougher than others? I've had a few experiences where an electronic ...
-2
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1answer
1k views

Iphone 7 plus mic frequency range [closed]

I recorded a video from some birds around my car while the car was off and its alarm system was on. After watching the video I noticed that there is an oscillating noise recorded by the phone near ...
0
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2answers
134 views

Charging iphone without USB [closed]

I am looking to charge my iphone using a thermoelectric power generation device. The thermoelectric generator device has positive and negative leads, and I have tried connecting the wires from the USB ...
0
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1answer
549 views

Why does four Apple Model Numbers (A1457, A1518, A1528 & A1530) have two FCC IDs (BCG‑E2643A & BCG‑E2643B) [closed]

These are model Numbers of iPhone 5S. I want to know why two Model numbers of iPhones have the same FCC ID? I am assuming that as they are two models, they are NOT the same for Apple yet they have the ...
0
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2answers
180 views

Anyone an expert on mobile LCD displays? [closed]

Reason I ask is, I've noticed with water damaged iPhone 6 screens if the pins on the connectors of the screen itself have corroded and you fix them with cleaning and fresh solder or jumper wires 8 out ...
1
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2answers
2k views

Is it safe to use RFID in a phone case [closed]

I looked into this and found only vague indications that it should be no problem, but nothing specific enough to feel safe. Based on reading this question and its answers and comments it seems like it ...
0
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1answer
2k views

Floating D+ and D- on a USB Charger

currently I have a problem with an USB Charging Plug (from china). There are some designs, where the D+ and D- line is shorted together, in other there are held to 2.7V. On my plug on the table, ...
-2
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1answer
191 views

Using or switching between two USB power sources, one being data USB [duplicate]

This is what I need: What's the best way to achieve this without damaging my car's audio? I want to connect my iPhone to my car's audio and charge it at up to 4.2A iPhone will draw up to 2A instead ...
1
vote
1answer
2k views

USB data transfer with a separate power source

The car I recently bought has a built in USB but only provides 500mA. I want to use a cable like the one below to connect my iPhone to the built-in USB to play music/satnav on the car stereo, but I ...
14
votes
2answers
7k views

Why do only high-end phones support a lot of LTE bands?

Most lower and middle end phone only support 3/4 LTE bands. High end phones, like the iPhone, or flagships from Samsung and LG also support a lot of bands. iPhone 7: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, ...
0
votes
3answers
234 views

How to a build a payphone controlled iPhone? [closed]

I'm trying to create a project for my kitchen that involves using the shell of an old payphone and a modern cell phone ( perhaps iPhone ) to actually make calls. Basically, I would like the user to be ...
1
vote
1answer
131 views

How to initiate a Lightning connection

I'm trying to take the first step to establish a connection with an iPhone using the Lightning port. I'm using the Lightning A male connector body, which I believe should set the iPhone to be a USB ...
0
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2answers
173 views

How to prevent iPhone 6 acting as faraday cage

I have experimented with attaching my work RFID access card to the back of my iPhone 6 which is made from aluminium. However it appears that the phone is acting as a faraday cage and preventing my ...
0
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1answer
263 views

How do I wire a Shure WL 185 to to iPhone or iPad?

I have this old but very nice mic. Old days I recorded audio to the camera or recorder. Nowadays I record to iPhone so I do not have extra recording device and cameras are action cameras usually ...
2
votes
1answer
11k views

Microphone voltage on a 3,5mm PC microphone/headphone jack

I bought one of those cheap cup-anemometers that you can stick into the 3.5mm headphone jack of an iPhone or Android device. I'm assuming it is some sort of pulse generator and that the app uses an ...
-3
votes
1answer
433 views

Am I understanding this circuit right?

This is from an iPhone 6. I'm having a hard time understanding how q1701 controls the "handshake" to Tristar_pin to allow charging. (Diagram says "pin for handshake" next to C1704 at top right.) I ...
1
vote
2answers
2k views

iPhone screen pin layout

I have an old iPhone of which I want to reuse the LCD display. The thing is, I don't want to use it as an actual display but rather make a fancy lamp out of it. The question I have is how I can figure ...
0
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2answers
1k views

iPhone schematic help

Could someone help me understanding the markings of this schematic? What the little numbers I circled in red and yellow are. Is c59 providing power to that entire circled area or is just two points ...
1
vote
1answer
360 views

How does a Touch Screen Digitizer Tester work?

I'm currently replacing my screen for my Iphone and having issues with my touch screen dropping. The guy who sold it to me said he used this to test it. http://www.ebay.com/itm/LCD-Display-Touch-...
2
votes
2answers
5k views

On an Apple 12W USB Charger, how are the D+ and D- lines configured?

Looking for the voltages on the V+ and V- lines of an Apple 12W charger that corresponds to the 2.4A output.
0
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1answer
146 views

Working on a high current USB charger

Title says it: I'm working on building a high current USB charger for my devices so that I can integrate USB ports into my headboard. However, I'm having a few glitches. When I plug in a device, the ...
0
votes
2answers
8k views

Does it help to replace the battery if phone is slow? [closed]

Some people I know say that replacing the battery helped their smart phone improve its decreased speed resulting of two years of use. My initial guess is that this would not have any influence ...
-2
votes
3answers
4k views

How much mA to charge an iPhone

I'm building an iPhone solar charger and I'm not very good with electronics but I want to know how long it would take to charge an iPhone 6 fully. The panel I'm using has: ...
0
votes
1answer
316 views

USB data cable that doubles up as a USB storage device

Is it possible to create an USB to micro USB (or lightning) cable that has storage built into it? So if it's plugged into a computer with no phone, the computer recognizes it as a regular USB ...
2
votes
1answer
267 views

Multiple PWM signals from a single audio channel

Here's my project in a nutshell: I'm building a quadcopter and I need to control each of the four motors independently. I'm using an iPhone as the "brain" of the quadcopter, with of all the control ...
-2
votes
1answer
363 views

How to read the headphone jack in android or iphone [closed]

I have two switches that I would like to connect to an android phone (and/or an iphone). To be clear, I would like to connect a morse code key that has three connections: a ground, a dit and a dah. ...
1
vote
1answer
79 views

iPhone Charging Current Zap

I charge my iPhone 4 right next to where I build my circuits, so I'm always simultaneously looking up datasheets, texting and so on. What's interesting is whenever I touch the rail/antenna of the ...
-5
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2answers
1k views

IPhone charging with Supercapacitor [closed]

Can a 3000 Farad Supercap at 5V charge an iPhone? If yes how much will it charge it percent will it charge it to? Thank you
0
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1answer
3k views

Turn on/off led via headphone jack in iPhone

I have an iPhone project , I need to turn on and off a led powered with a battery using iPhone via 3.5 mm jack. there is some examples what I need https://www.youtube.com/watch?v=w0VopnVZQ-w http:/...
0
votes
1answer
88 views

Emulating the start/stop button on the remote control of the iPhone

I need to build an (apparently) extremely simple device which is basically a pushbutton that pauses and restarts the playback on an iPhone. This is exactly what the central button does, on the remote ...