4 ms·
Which will all be inside an IC, away from the microphone. So what, does the light turn on whenever the entire IC sees power? Because if it relies on a signal
by newnewpdro 8y ago
Which will all be inside an IC, away from the microphone.
So what, does the light turn on whenever the entire IC sees power? Because if it relies on a signal from within the software-controlled IC, that's not exactly trivial to audit.
- XMPPwocky 8y agoThe trivial solution would be a LED + resistor just wired across the mic's power rails.
- newnewpdro 8y agoWhen the microphone is a passive connected to a multifunction IC there's no such power rail.
- justtopost 8y agoMost laptop mics are condenser electret mics which usually use a small dc current, although not always.
- newnewpdro 8y agoNot the last time I went down this road hardening a Thinkpad, see Step 6 at [1] (not my site). I haven't bothered with any smartphones yet, so I can't speak to what they tend to use for a mic. But if I carried one I'd definitely rip out all the voice coils and rely on a pair of headphones w/integrated mic for voice comms to mitigate potential for eavesdropping. [1] https://blog.patternsinthevoid.net/replacing-a-thinkpad-x60-bootflash-chip.html https://blog.patternsinthevoid.net/replacing-a-thinkpad-x60-...
- colejohnson66 8y agoWhen replacing the lightning assembly on my iPhone 6, I noticed that the microphone looks passive. Here’s a photo[0]; It’s the little bronze(?) square next to the headphone jack. [0]: https://www.ifixit.com/Store/iPhone/iPhone-6-Lightning-Connector-and-Headphone-Jack/IF268-004-1 https://www.ifixit.com/Store/iPhone/iPhone-6-Lightning-Conne...