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Questions tagged [apple]

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TRS to Apple TTRS and then lightning connecting to external Mic Summary and Question

Thank you for coming this far. Here's the picture first (the bottom bit's the one that's most important) and if you've just got time to write "1", if one is correct" or "2" if two is correct, I'd ...
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15 views

Odd behavior charging Apple products from 5vdc [duplicate]

I'm designing a PCB for a product, and this product will incorporate a 5vdc USB-A output to charge other devices. To get a sample of what current different devices will draw from a non quick charge ...
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0answers
99 views

Visual circuit simulation on a Mac

I am currently trying to design a circuit on a Mac (some might say therein lies my problem). My goal is simply to design a rudimentary implementation of the circuit which I can visualise working I ...
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1answer
60 views

How does Apple's ADB's collision resolution work?

I've read several different documentation sources explaining how Apple's asynchronous ADB protocol works. Although quite convoluted, it makes some sense of several rereads. I am having difficulty ...
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1answer
78 views

Does Apple or Qualcomm do product binning for their SoCs?

It's well known that Intel does product binning with their CPUs — essentially selling the same chip as multiple different chips with different specs and prices based on the tested properties of the ...
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1answer
846 views

Apple devices - “Vibrating feel” when charging [duplicate]

I am absolutely not experienced when it comes to electrical stuff at all which is why I hope you can help me out on this one because I am a bit worried right now. I own a bunch of Apple devices and ...
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0answers
21 views

What is the technical specifications for the Macbook Pro Retina 15" Mid 2015 internal microphone?

I'm looking for the tech specs, including the sensitivity, voltage and signal-to-noise ratio for the Macbook Pro Retina 15" Mid 2015 internal microphone. Really struggling to find this information ...
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1answer
127 views

Repurpose a MagSafe 2 Charger for USB-C [closed]

Hi Mac Owner here that is now dealing with cable hell... I have an inexpensive 60W MagSafe 2 charger that I was wondering if I was able to rewire the connector for USB-C. I have experience with ...
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2answers
102 views

USB Charging Voltage vs Battery Life

I've been running some tests on USB charges from different manufacturers checking voltagem and current. I noticed that some usb charges do deliver 4.9 to 5.2 volts and from 500mA to 2.4A. My ...
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1answer
66 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 ...
2
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2answers
2k views

How Macbook Pro detects an external microphone through TRRS jack? [duplicate]

An audio port on a MBP is a combination output. If you plug in 4-conductor 3.5mm connector (TRRS) like the one on Apple earbud with microphone, it appears that that port can be use as an input. I ...
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2answers
554 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 ...
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2answers
2k 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.
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0answers
255 views

How to interface with the Apple Watch for the purpose of accessing its internal memory? [closed]

Unlike other apple products which can be directly connected to a PC via USB, the Apple Watch is completely wireless from the point it exits the factory, as far as I am aware. Aside from a 6-pin ...
2
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1answer
182 views

What is the purpose of this transistor in an Apple Time Capsule?

While taking apart a 2009 Apple Time Capsule, I found a 2N3904 NPN transistor on a 2-wire cable with the emitter connected to one wire and the base and collector connected together and to the other ...
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3answers
844 views

Understanding the Apple 1 power supply

I'm trying to understand the schematic of the Apple 1 computer power supply. Nothing surprising at first sight. Two power transformers (117 VAC -> 10 VAC / 117 VAC -> 28 VAC), two diode bridges, and ...
21
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1answer
34k views

How do volume control headphones work?

A recent question over on Android Enthusiasts got me to wondering how volume control headphones work. I don't mean volume control which works by attenuating the incoming signal, but the kind of ...