Questions tagged [iphone]

Questions about iPhone's hardware and interfacing circuits to iPhone

4
votes
3answers
4k views

IR to audio converter (frequency and level)?

What kind of IR detector and converter circuit could be used to down-convert an IR remote signal (in the neighborhood of 35 to 45 kHz) into audio frequency signals (0.1-20 kHz) of the appropriate ...
0
votes
2answers
299 views

System on chip questions

I was reading about System on Chip on wikipedia and I was wondering Is the iPhone an example of this? Is the system saved on a processor? How is the system actually put on the device? Thanks!
2
votes
4answers
9k views

Improving throughput of a Bluetooth Low Energy Connection

Follow-Up question from Stackoverflow I am trying to write a characteristic value repeatedly over a short amount of time. Different sources tell that rates between 200 and 305 kbit / s should be ...
5
votes
4answers
11k views

How do I build a TRRS headphone jack with a jack that is detectable by an iPhone

I have a circuit and I am trying to integrate it with an iPhone via a TRRS headphone jack's microphone input. I have a generic TRRS cord and am trying to send a signal through it. However, the iPhone ...
0
votes
1answer
771 views

Arduino and iPhone via WiFi

First of all, I can control Arduino from iPhone by using Processing and TouchOSC app. But my task is to achieve a control wirelessly "without using a PC" in between. I need to control Arduino ...
38
votes
6answers
155k views

What is the voltage range of a standard headphone jack from a phone?

I want to connect the output from the audio jack of an iPhone to an Arduino. What voltage range can I expect to see on the audio lines from the iPhone? I assume that turning the volume up on the ...
1
vote
2answers
2k views

How can extend the cable distance from a condenser microphone to the ADC without loosing fidelity?

I am new here so please forgive me for a vey basic question. I have a TASCAM iM2 in my possession. This is a stereo condenser microphone coupled to an ADC that connects to the the latest iPhone models ...
2
votes
1answer
2k views

What is the most common type of accelerometers in today's smartphones?

I know there are 6 different types of sensors for measuring acceleration: Capacitive Piezoelectric Piezoresistive Hall Effect Magnetoresistive Heat transfer-based I have trouble finding a source ...
0
votes
1answer
276 views

Connecting LED to iPhone's dock connector

Is it possible to connect a single LED to iPhone dock connector?
1
vote
1answer
352 views

Mobile phone TRS output to microcontroller digital input?

How should a mobile phone headphone audio output (such as the headset jack on top or bottom of an iPhone) be interfaced to a microcontroller digital input? (3.3V controller. Assume no audio frequency ...
4
votes
2answers
5k views

Digital input to mobile phone headset port?

This seems to be a common smartphone project, but I haven't seen circuit diagrams with explanations. What filter network (or resistor network, or other buffering circuitry) should be used to connect ...
6
votes
1answer
2k views

Interfacing an ATTiny84 to iPhone from headphone jack

I'm trying to create an adapter and an application for the iPhone that works very similarly to the Square Up card reader. The basic communication I'm trying to achieve: Plug in adapter to phone ...
1
vote
1answer
408 views

End of MFI ? Cable to arduino n others

I am interested in the MFI made for iPod program, and found This $59 Cable Lets You Connect iPhone to Arduino — No Jailbreaking! Programming iPhone Sensors Book I have ordered the cable and will ...
3
votes
1answer
925 views

Data modulation over Bluetooth headset profile?

What kind of data modulation schemes might be suitable for sending data to/from a Bluetooth audio headset? e.g. What kind of data modulation would likely survive the audio compression schemes and ...
5
votes
2answers
9k views

How can I disassemble an iPhone 4 battery without damaging it?

I would like to measure the power consumption of an iPhone 4 using a source/measurement unit. On other devices I am able to connect the SMU directly to the +/- battery terminals, using tape to ...
1
vote
1answer
5k views

How to wire sennheiser headphones to an iphone headphone cable

I have a pair of these (or something very similar) : The plug failed so I chopped it off and was hoping to wire it to a plug on a spare pair of iPhone headphones I had kicking around. Both sets of ...
2
votes
1answer
7k views

How could you detect a microphone attached to a smartphone?

I've a circuit that makes sounds through an a standard audio jack (3.5mm) and I would like to connect it to a smartphone (let's say iPhone). When I connect it to an iPhone, it will be detected as ...
7
votes
3answers
6k views

Transfering data using ultrasound

Yamaha InfoSound and ShopKick application use technologies that allow to transfer data using ultrasound. That is playing an inaudible signal (>18kHz) that can be picked up by modern mobile phones (iOS,...
4
votes
2answers
10k views

line-level audio into an iPhone headset jack?

What level and/or impedance matching (or pre-amp) circuits should be used to send a line-level audio signal into the mic input ring of an iPhone headset jack with minimal distortion and/or loss?
1
vote
1answer
2k views

Ipod/Iphone/Ipad cable hack

Has anyone hacked an IOS cable and knows what data is going in and out of which wire. Maybe a diagram of an iphone cut cable?
2
votes
2answers
6k views

Implementing a Microcontroller with an Iphone App to Control household lights?

Hello everyone I am new to microcontrollers and electronics in general, and would like to learn how I can control lights within my house via an iOS Application. How would I go about doing this...with ...
4
votes
4answers
2k views

Touchscreen Performance (iPhone, iPad, Android, Nexus S, etc.)

Who makes the touch screens for the iPhone or Android devices? Specifically I'm wondering what the sampling rate is for dragging, etc. that gives these devices such smooth touch and drag performance. ...
1
vote
2answers
1k views

Interface netduino with Iphone via audio jack

I am interested in making the netduino establish a BUS connection to the IPhone via the audio jack. Does anyone have any experience doing this? I have read a few things online...but I am somewhat lost....
3
votes
2answers
3k views

How to use an audio output to generate IR frequencies

I have an idea for a project but need some help on achieving what I want to do. I want to create a device which will insert into the audio jack of my iPhone which will emit IR signals to control my ...
2
votes
2answers
351 views

Serial nested if statements (Not working)

I have been trying to get this to work for a few days. What i have at the moment is TouchOSC installed on my Iphone sending commands to a processing program, which in turn simplify's them and sends ...
2
votes
3answers
346 views

How do I find an E.E. to partner with for a product?

I am a software developer and need to work with a partner who will design and develop a device (SIMPLE device) to interface with the iPhone hardware port. I am not sure of the best place to find such ...
4
votes
7answers
6k views

iPhone hardware serial port access

Does anyone know how to access the iPhone's serial port, from a program on the iPod to allow that application to send signals. The idea is that the iPod could be used as the brain for some kind of ...
4
votes
3answers
5k views

Using the iPhone to control a remote controlled car via Arduino

So i started this project a while back where i made a remote controlled car that i could control with the directional buttons on my keyboard via an Arduino -> now the next step i want to do is to get ...