Questions about iPhone's hardware and interfacing circuits to iPhone
5
votes
3answers
200 views
+100
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
75 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 ...
0
votes
0answers
91 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
0answers
23 views
Selecting a BT stack [closed]
I am selecting which bt stack fits for me but i am not sure about it.
My hardware must be composed of a BT module with SPP/iAPP + HFP/HSP support (probably one from Panasonics as they are smaller) ...
-3
votes
1answer
46 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
votes
0answers
34 views
Bluetooth Chip like vTag: Pairing, Buzz, Alarm (Vibrate) & Battery [closed]
The idea is created a chip that functions like vTag but the other way around... using the Bluetooth chip to alert (not find) that the iPhone is getting out of the "sight"/far away. If it already ...
-3
votes
0answers
32 views
What stores offer the best deals on Mobile Phone Chargers in the UK? [closed]
I am looking to buy several items and so googled for clearance sales going on for these:
Mobile Phone Chargers for 2 Samsung galaxy phones
desktop battery charger
plugtop adapter with dc connector
...
1
vote
1answer
80 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 ...
2
votes
0answers
197 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
137 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
151 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
182 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
276 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
942 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
152 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
301 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
86 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
6
votes
1answer
307 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 ...
2
votes
3answers
912 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 ...
2
votes
1answer
1k 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
98 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 ...
1
vote
2answers
276 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 ...
0
votes
0answers
72 views
find pic18 Board with iPhone through wifi
I'd like to detect a network enabled pic18 Board over the Network with the iPhone. Communicating to a specific IP is not the Problem, but I need to use a Protocol like Zeroconf to find the Device in ...
4
votes
3answers
484 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 ...
-1
votes
1answer
659 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 ...
6
votes
1answer
553 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 ...
3
votes
1answer
229 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 ...
1
vote
1answer
413 views
Does the TI CC2540 support Bluetooth High Speed protocol?
The Bluetooth High Speed (HS) protocol is included in the Bluetooth 4.0 spec, but I can't find whether or not standard Bluetooth 4.0 modules such as the TI CC2540 support the high speed part of the ...
4
votes
3answers
984 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
137 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
3answers
1k 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 ...
1
vote
1answer
2k 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
354 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 ...
0
votes
0answers
157 views
iphone's camera extend [closed]
i'm looking to wire-extend my iPhone's camera, but I don't know which cable type I should use ?
See related picture.
http://cart-products.ifixit.net/cart-products/rRwcPPyHZDWhXKHX.standard
4
votes
1answer
7k 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 ...
-2
votes
1answer
374 views
iphone app that can keep power consumption as low as possible [closed]
I've been asked to build an iphone app for a store where the employee uses iphone all day long for their activity in store.
they have iphone 3g and an additional battery pack embeded din a rugged case
...
1
vote
2answers
402 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 ...
1
vote
1answer
482 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
214 views
Connecting LED to iPhone's dock connector
Is it possible to connect a single LED to iPhone dock connector?
1
vote
0answers
87 views
Viewing live video feed from an external video device using the 30-pin connector [closed]
I cross-posted from apple.stackexchange.com, but without any luck. Maybe you guys can help me. If I had an external video camera of the sorts (or at least some type of device that can record video), ...
1
vote
1answer
251 views
Mobile phone TRS output to microcontroller digital input?
How should a mobile phone headphone audio output (such as the jack on top of an iPhone) be interfaced to a microcontroller digital input? (3.3V controller. Assume no audio frequency capable A/D is ...
4
votes
2answers
2k 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 ...
4
votes
1answer
657 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
264 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
403 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 ...
4
votes
2answers
2k 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
1k 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 ...
1
vote
1answer
2k 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
2answers
1k 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 ...
3
votes
1answer
1k 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?
