Questions tagged [apple]

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What are the Bluetooth (low energy) scan settings of smartphones

My challenge: I'm trying to find out the best timings for a complex bluetooth low energy (BLE) system, where a central station shall be able to connect to smartphones (=scanner) as well as to coin-...
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1answer
99 views

Is 3.5mm jack to female Apple Lightning adapter technically possible?

I couldn't find a trustworthy source for whether Apple EarPods are digital or analog, but I'm pretty sure it is digital as most teardowns show a chip on it that might be a DAC. Should this make ...
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0answers
143 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 ...
1
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1answer
71 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 ...
1
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1answer
125 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 ...
2
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1answer
3k 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 ...
-1
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1answer
172 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 ...
0
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2answers
121 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 ...
1
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1answer
93 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 ...
3
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2answers
3k 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
814 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 ...
2
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2answers
4k 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.
2
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0answers
259 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
243 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 ...
3
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3answers
1k 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 ...
23
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1answer
39k 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 ...