News for hackers. Stuff that matters.

A comment on Show HN: Is It Snappy? – Measure latency with your iPhone's 240 Hz camera. Parent comment

Re:Show HN: Is It Snappy? – Measure latency with your iPhone... by problems on Monday April 03, 2017 @03:34PM (#14026304)
I thought most phones had IR filters these days and that this wouldn't work? Am I incorrect here?
[ Parent | on HN ]
Re:Show HN: Is It Snappy? – Measure latency with your iPhone... by cuonic on Monday April 03, 2017 @03:49PM (#14026450)
They have basic IR "filters" which are used to reduce IR light, but they don't totally block it, which is why you can see a purple light coming from TV remotes and such [0]

0: http://www.wikihow.com/images/6/60/Check-if-a-Remote-Control...

[ Parent | on HN ]
Re:Show HN: Is It Snappy? – Measure latency with your iPhone... by IanCal on Monday April 03, 2017 @03:46PM (#14026424)
I just checked mine now, new Moto Play Z so pretty recent, and it's much less noticable than it used to be. However, going into a dark spot so nothing else could be seen, the led in the remote flashed a slight purple. Definitely enough to check it's working, but you need a bit more cover around it to be able to see it. In the past, they used to flash like bright bulbs.
[ Parent | on HN ]