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Questions tagged [iphone]

Questions about iPhone's hardware and interfacing circuits to iPhone

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1answer
802 views

GSM Battery/Amperage Usage

I have a general question. I have a GSM module (adh8066 link to data sheet below) that I purchased from sparkfun. In the data sheet, it states that in tx mode, the module can draw up to 2 amps @ 12v....
1
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2answers
2k views

iPhone jack remote buttons wiring

I'm trying to emulate via Arduino the volume down button of the remote mounted on iphone earbuds, and I can't find anywhere how that function is achieved; I imagine ...
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3answers
1k views

Is there a metal that will not interfere with smartphone reception as a case?

I want to design an iPhone case that will include a metal plate on the back of it. Is there any kind of metal that will not interfere with the phone's reception?
2
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1answer
869 views

TRRS connector with iphone circuit board, how to get mic compatible with PC input (Bose Q25)

I have a Bose Q25 headset, it uses an iphone compatible trrs jack. It contains stereo input, mic output and the button controls. I split it into 2xTRS jacks using a commercial splitter, the mic is ...
1
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1answer
204 views

Can I modify this bluetooth keyboard to only have a certain keys so I can carry it around?

I'm trying to make a bluetooth remote shutter release thing for Androird and iOS. I asked about doing it from scratch but everyone thinks it's too ambitious for a beginner, so I gave up on that Few ...
1
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1answer
460 views

Making Device to Send Data to Smartphones: 100m range, 1kb/s bandwidth, low power

What I want to make: A device that immediately sends a notification if the device incurs a moment of high acceleration. The notification needs to denote the acceleration. There is no guarantee that ...
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1answer
225 views

Is it bad to charge an iPhone 5S with an iPad Air's charger? [closed]

Often in the little leaflets that come with chargeable electronic gadgets, manufacturers state that you should only use the original supplied charger to charge the gadget. We all know that an iPhone ...
0
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1answer
126 views

What components do I need to connect a phone to my device via Bluetooth?

I have a phone I want to connect to a docking station I am making, via Bluetooth for as cheap as possible. As I understand the situation, all I need is something that can pick up a bluetooth signal ...
14
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2answers
4k views

How does this iPhone app measure the power flowing through an AC appliance cord?

My electric utility released an iPhone app called "DTE Insight" which (among other things) measures the amount of power flowing through an appliance's power cord by asking you to hold the cord against ...
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0answers
928 views

How to transfer data via an Apple Lightning port

I have a board on which a microcontroller reads the output from a sensor. I am thinking of connecting it to an iPhone so that the iPhone can read data from it. The board should also be powered by ...
0
votes
1answer
708 views

Amplifying analogue audio from an iPhone docking station

So I have an old iPhone speaker dock that broke after I plugged in the wrong cable and fried the microchips on the circuit board. From it however I salvaged the dock connector itself and a couple ...
0
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1answer
1k views

Lightning Connector Power Output rating/ Apple Policy

I am currently in the process of developing an external antenna for smartphones, so the answer of the following question(s) pertains to the feasibility of this product. What is the line level output ...
0
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1answer
2k views

Re-programming PIC microcontrollers with USB through smartphone

I want to be able to reprogram my microcontroller through my smartphone. My microcontroller will be sending data to the phone through USB with a built-in USB module. However, I will run into the ...
2
votes
1answer
127 views

Scrapping conponents from an iphone

I have an iphone 4 that no longer works. I know that selling it is always an option, but i'm curious if i can scrap spare parts from it instead (especially sensors). I've looked online, but haven't ...
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0answers
264 views

Build or Buy Bluetooth 4.0 BLE Tag [closed]

I am planning to create a mobile application that scans a NFC tag and performs an action based on the unique scan (tap). Because Apple iPhone do not support NFC I am forced to look for an alternate ...
0
votes
2answers
389 views

How does iPhone detect when dock connector is connected to an audio input?

I'm trying to solve a seemingly simple problem with (hopefully) an equally simple solution. I'm strictly an amateur when it comes to electronics, so I'm hoping someone here can guide me in the right ...
4
votes
1answer
1k views

passive high pass filter to iphone mic jack

I'm attempting to input a heart rate signal into my iPhone via the microphone jack. I need to pass the signal through a passive high-pass filter to remove the DC offset before inputting it in to the ...
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2answers
147 views

Getting the direction that user is facing

I've just started playing with electronics and I'm wondering. As you guys probably know, using the iPhone you can get the direction that the user is facing. My question is, what electronic ...
3
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2answers
2k views

Counting number of bluetooth 4.0 (BLE) devices near me?

Does bluetooth allow you to discover devices around you that are simply on but aren't in any discovery state? I am not trying to pair with all these devices but merely count the number around me and ...
3
votes
2answers
494 views

Is there a means of USB interfacing to an iphone, which does not require an expensive Apple approval process?

I am developing an external hardware that needs to make USB interface to iPhone. (30pins for now). I do not think Apple would approve MFi for an individual. For USB interface, is there no way? Or ...
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votes
1answer
631 views

Typical Power circuit for smartphones? Correct energy measurement? (Nexus 4, iPhone.. etc)

I am trying to perform some energy measurements using smartphone. And to make sure that I am performing my calculations correctly, I been trying to find any examples of typical power circuit in today'...
2
votes
1answer
152 views

Add iPod 4 dock to old Hi-Fi (Will my idea work?)

I'm currently attempting to add an iPhone Dock to my old Aiwa Hi-Fi system. I've used a multimeter and established that the VCC for the Hi-Fi's internal circuitry is ...
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1answer
3k views

Pinout of iPhone 4/4S rear camera connector?

Has anyone come across the pinout of an iPhone 4/4S rear camera module connector?
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2answers
2k views

iPhone Headphone Jack - Accessory & Headphone Use

I'm working on an iPhone accessory that consists of a temperature sensor and LED. I want to power the accessory through the iPhone headphone jack, but I'm concerned that the user can't use headphones ...
0
votes
1answer
919 views

How much energy can the iphone output into an external device?

I am having a lot of trouble finding any concrete information online about how much voltage/amperes the iphone 30pin as well as the new 8pin connector is capable of outputing to an external device. ...
4
votes
1answer
2k views

Can the NFC antenna of smart phone read signals from (active) RFID tags/transmitters

Can the NFC antenna of mobile phone such as the Galaxy S4 or iPhone in addition to their NFC functionality, also be used to read signals from (active) RFID tags/transmitters e.g. from 20ft away not ...
3
votes
1answer
1k views

Circuits for two way data transfer from iPhone to Arduino via headphone jack

What I'm trying to do: I recently bought an iPhone 3GS (yes iPhone...) and I am going to install Android on it so I can make apps myself for it and incorporate it in a bigger project, using the WiFi ...
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2answers
3k views

data signal on headphone jack input on iPhone [closed]

I am building an external device for the iPhone that will produce an analog signal that I want to send through the headphone jack. From all my reading, all data sent through the jack is in analog ...
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2answers
2k views

How to use iPhone to evaluate an IMU chip?

I have a quadcopter like the below (source of the image) and I have an IMU (inertial measurement unit) having acc sensors in X-Y-Z and gyro sensors in X-Y-Z. Now I am trying to find an iPhone app ...
7
votes
3answers
2k views

Is a human (or other) electrical signal absolutely necessary to activate a capacitive touchscreen?

I know this is the general wisdom, and that someone has asked a similar question here: How can a capacitive touch screen be triggered without human contact? However, I didn't quite understand the ...
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2answers
173 views

iPhone control LED light without wifi

I am fresh to the electrical engineering, and actually I am a web developer, ruby and php, etc. I am wondering that is there a simple way to control one or more LED lights using iPhone without wifi ...
3
votes
1answer
9k views

Convert Iphone 3.5mm pin to standartd Samsung Android 3.5mm pin

This is a simple question. I want the new Iphone EarPod to work with Samsung/Nokia phones. I tried to use the headphone to Samsung phones. Here is the result Here is the Universal 4-pole Cell ...
1
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1answer
502 views

Can I convert audio signals from an iphone to electrical signals to control another device?

I wish to design a mobile app that will allow me to touch parts of the screen, generate a music tone that will be converted to an electrical signal to move part of a toy. By touching different parts ...
5
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1answer
5k views

Arduino - Trigger an iPhone's touch screen with no human interaction

I'm trying to replicate part of this experiment. Specifically, I want to touch the screen with a cable and some aluminum foil whenever I send a signal from an Arduino pin. From the blog post linked ...
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1answer
2k views

Home automation appliances wired to micro controller with wireless control from ipad/iphone [closed]

I'm currently going to start developing a media controller for my room. This microcontroller would be controlled wirelessly from my ipad. so there's three parts to this, my ipad, simple ...
0
votes
1answer
2k views

Charging iPhone via AAA battery [closed]

I have a trip in near future, I have a hub dynamo fit to my bicycle which has 6.0 V DC output of 3 Watts power. I have read few posts and realized that it is risky to charge my iPhone directly through ...
3
votes
2answers
2k views

Sending data through the iphone headphone jack

I recently bought a TRRS Pigtail on sparkfun and I want to have two buttons attached to one end of the cord and another end connected to the iphone in the headphone jack. I would like to be able to ...
1
vote
1answer
3k views

Can you damage an iPhone by charging it using a (homemade) solar panel? [closed]

I found a guide online that shows how to make a solar phone charger (in a bottle), and I thought I'd try it out, but I'm worried about damaging my iPhone 4 (for a school project). (If anyone's ...
5
votes
2answers
17k views

Can a Bluetooth 4.0 BLE device talk to a Bluetooth 2.1 device at the most basic level?

I want to develop an app on an Apple iPhone, that has Bluetooth 4.0 BLE embedded, that talks to a basic piece of kit with a bluetooth 2.1 chip in it? Firstly - is it technically possible - if I only ...
2
votes
2answers
1k views

How do I get a relay to recognize when a TRRS jack is plugged into my iphone?

I'm working on a project where I would like to put an aux input in my car. I was thinking of hooking up my CD changer output wires to a relay and then hook up the aux wires to the other part of the ...
0
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1answer
968 views

TS jack to XLR?

I made my own cable to connect iPhone 4S to mixer. An iPhone TRRS jack has 4 poles (tip, ring, ring, sleeve) for (left, right, ground, mic ) respectively. I used a TS plug instead, connecting pin 2 in ...
8
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1answer
1k views

Mimic human capacitance

In a video at Kickstarter a project called Tapcaps is mimicing human capacitance for triggering touches to a capacitive touch screen (the iPhone). At 0:45 in the video we can see a glimpse of the ...
3
votes
3answers
4k views

Sending data from RN-171 in adhoc mode

First, I'd like to note that I'm a software engineer by profession and haven't had anything but trivial experience in interfacing with hardware. With that said, I'm looking at getting a prototype ...
11
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3answers
23k views

Electronic aspects of iPhone 3.5mm audio output

I am working for a while now on a small project of building an external mic for the iPhone to be hooked in parallel to headphones (via the 3.5 mm jack). Basically, I want to replace the iPhone's ...
0
votes
1answer
311 views

Potential problems with paralleling a jumbo battery to iphone internal battery?

Recently I happen to replace a new iPhone 4 replacement battery, with a little bit of peel down of the battery, I saw there is a bare lithium battery unit with a PCB battery protection board. My idea ...
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2answers
704 views

How can I convert the current from a fan to the microphone headset input on an iphone?

I am working on creating an anemometer (or wind meter) for the iPhone. I am a programmer and know exactly how I could do this on the software side of things, but I am a complete noob when it comes to ...
5
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3answers
2k views

80's Cassette Line to Microphone Level for iPhone

This is a followup question to this one: Using an iPhone as a cassette recorder for 80's home computer I'm trying to record from an 80's home computer (a Microbee) into an iPhone. Although I ...
0
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1answer
3k views

Can a headphone jack power an LED? [duplicate]

Possible Duplicate: Power LED from headphone jack New to electronics (I am a software guy) so pardon me if it's a very noob question. Can an iPhone headphone jack power a small LED? The LED ...
7
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1answer
1k views

Why isn't iPhone minicom reading serial data from Arduino?

Alright, this is my first time posting on electronics.stackexchange.com but I have frequented stackoverflow.com for some time now. Basically I am trying to output serial data from the Arduino to an ...
4
votes
1answer
379 views

Using an iPhone as a cassette recorder for 80's home computer

I've got an old 80's home computer (a Microbee) that I've just got running again. It uses cassette to save/load programs and I thought I'd see if I could use my iPhone instead of an actual cassette ...