Questions about iPhone's hardware and interfacing circuits to iPhone

learn more… | top users | synonyms

1
vote
3answers
100 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?
0
votes
0answers
43 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
vote
1answer
57 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
vote
0answers
81 views

i want to make my own bluetooth shutter release thingy as first electronic project, what do i need? [closed]

I want to make something like this http://www.amazon.com/JBtek-Bluetooth-Wireless-Control-Shutter/dp/B00JDMIOKO/ looks like it's a tiny microcontroller with a battery in the remote, but i'm not sure ...
1
vote
1answer
92 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 ...
1
vote
1answer
54 views

How to charge an iPad for maximum battery efficiency [closed]

iPhone chargers provide 5W of energy while iPad chargers provide 10W of energy. If you plug an iPad in an iPhone charger it will charge slower than normal. Also, there are many computers which provide ...
0
votes
0answers
25 views

Activate touch screen without human input [duplicate]

I am creating a small home project, and as part of this I need to be able to activate a touch screen on an iPhone without human interaction. I have built the machine to carry out various movements but ...
-2
votes
1answer
67 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
votes
1answer
67 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 ...
7
votes
2answers
545 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 ...
1
vote
0answers
83 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
138 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
votes
1answer
209 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
votes
1answer
211 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 ...
1
vote
1answer
71 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 ...
2
votes
0answers
125 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
162 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 ...
1
vote
1answer
714 views

Transmit and receive 433,92MHz signal from the smartphone [closed]

I would like to use my smartphone to send and receive signals from the devices that is working on the 433,92MHz. I assume that it's not possible to communicate directly with this device from the ...
4
votes
1answer
371 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 ...
-2
votes
2answers
83 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 ...
0
votes
0answers
131 views

iPhone TRRS Circuit Not Working

So basically what I am doing is creating an FSK module that sends data to the iPhone via a 4 pin headphone connector (TRRS). So the FSK audio signal comes from the module, and into the mic pin of the ...
3
votes
2answers
429 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
287 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 ...
1
vote
0answers
96 views

When a smartphone is connected to a charger (USB), does it use battery or charger as it's main power supply? [closed]

When a smartphone (fully charged) is connected via USB to PC (or to charger) does it uses charger or it's own battery as main power supply? Battery is supplying about 3.8-4.1 V and USB ~5V.
-1
votes
1answer
241 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 ...
2
votes
1answer
124 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 ...
1
vote
3answers
196 views

Iphone wireless communication without Wifi? [closed]

I am working on a robot that I would like to control using an Iphone app that I am creating. The problem I'm facing is that the robot will be operating in areas where there will most likely be no ...
1
vote
1answer
952 views

Pinout of iPhone 4/4S rear camera connector?

Has anyone come across the pinout of an iPhone 4/4S rear camera module connector?
1
vote
2answers
1k 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
0answers
84 views

What is the right mating connector for an iPhone 5 rear camera module?

I wonder what is the right connector type to mate with this iPhone 5 rear camera module? I know its a 32 pin connector, but not sure about its type. Can any of these Molex connectors mate with it? ...
0
votes
1answer
206 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
1k 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 ...
2
votes
1answer
805 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 ...
1
vote
2answers
1k 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 ...
-2
votes
2answers
743 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
948 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 ...
-1
votes
2answers
116 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 ...
1
vote
0answers
3k 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 ...
-3
votes
1answer
165 views

how to connect iphone femal plug to a smartphone plug or jack [closed]

I want to use the docking station made for the iphone for my htc phone. I bought a female iphone plug and tried connecting the wires but i have no idea which wire is which. The htc wires have only ...
1
vote
1answer
289 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 ...
3
votes
0answers
1k 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 ...
-2
votes
1answer
1k 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
806 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
1k 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 ...
2
votes
1answer
2k views

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

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 ...
4
votes
2answers
6k 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
604 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
votes
1answer
648 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 ...
-3
votes
1answer
127 views

Use iphone as a bluetooth broadcaster [closed]

Is there anyway to use the iphone 4 3.5mm jack as an AUDIO IN then broadcast all this audio signal to a bluetooth headset? What do i need to start? Thanks
8
votes
1answer
632 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 ...