4 ms·

> The Capture LED lets others know when you’re capturing content or going live. If the LED is covered, you’ll be notified to clear it. Wonder how that works.

> The Capture LED lets others know when you’re capturing content or going live. If the LED is covered, you’ll be notified to clear it. Wonder how that works. Maybe the capture LED has a light sensor next to it that detects reflections? It solves an interesting problem, although the prevalence of cheap spy camera glasses on amazon make it an uphill battle.

didntcheck 3y ago
I'd presume via the same type of proximity sensors that disable your phone screen when it's held to your ear
- seabass-labrax 3y ago
  That wouldn't work with all materials that could be used to cover the camera. The proximity sensors that you describe are designed specifically to measure the change in capacitance due to proximity to a human; they can't detect something like a blob of glue that causes no change in capacitance.
- Agentlien 3y ago
  For some reason this really doesn't work for me. I have also enabled the extra feature of locking the touch screen when in dark places, too. I still regularly get my pocket navigating my browser and my ear starting songs on Spotify mid-call.
farkanoid 3y ago
LEDs can effectively be used as light sensors when wired in reverse - About a decade ago there was a post where someone turned an 8x8 LED matrix into a touch sensor. Edit: Found the link, here it is: https://mrl.cs.nyu.edu/~jhan/ledtouch/index.html https://mrl.cs.nyu.edu/~jhan/ledtouch/index.html Analog Devices has an excellent article about using LEDs as sensors in this way: https://wiki.analog.com/university/courses/electronics/electronics-lab-led-sensor https://wiki.analog.com/university/courses/electronics/elect...
Saris 3y ago
They could pulse the LED quickly and while it's off use it as a light sensor for ambient light.
- DistractionRect 3y ago
  Probably this. Doing so would allow one to check for agreement between the video feed and the light sensor.
- schroeding 3y ago
  I wonder if one could just replace the LED with a UV one, depending on the tolerances this kind of detection may still work while being visibly "off". :/
baz00 3y ago
It’s probably duty cycled on and off and compared to a photodiode output on the reflection. Either way the moment that light comes on you’re getting punched if you point it at the wrong person. I’d rather have my phone hit out of my hand. Google Glass was not welcome and I suspect the same will be true of this.
- wilg 3y ago
  > Either way the moment that light comes on you’re getting punched if you point it at the wrong person. Seems not worth worrying about.

didntcheck 3y ago

I'd presume via the same type of proximity sensors that disable your phone screen when it's held to your ear

seabass-labrax 3y ago
That wouldn't work with all materials that could be used to cover the camera. The proximity sensors that you describe are designed specifically to measure the change in capacitance due to proximity to a human; they can't detect something like a blob of glue that causes no change in capacitance.
Agentlien 3y ago
For some reason this really doesn't work for me. I have also enabled the extra feature of locking the touch screen when in dark places, too. I still regularly get my pocket navigating my browser and my ear starting songs on Spotify mid-call.

farkanoid 3y ago

LEDs can effectively be used as light sensors when wired in reverse - About a decade ago there was a post where someone turned an 8x8 LED matrix into a touch sensor. Edit: Found the link, here it is: https://mrl.cs.nyu.edu/~jhan/ledtouch/index.html https://mrl.cs.nyu.edu/~jhan/ledtouch/index.html Analog Devices has an excellent article about using LEDs as sensors in this way: https://wiki.analog.com/university/courses/electronics/electronics-lab-led-sensor https://wiki.analog.com/university/courses/electronics/elect...

Saris 3y ago

They could pulse the LED quickly and while it's off use it as a light sensor for ambient light.

DistractionRect 3y ago
Probably this. Doing so would allow one to check for agreement between the video feed and the light sensor.
schroeding 3y ago
I wonder if one could just replace the LED with a UV one, depending on the tolerances this kind of detection may still work while being visibly "off". :/

baz00 3y ago

It’s probably duty cycled on and off and compared to a photodiode output on the reflection. Either way the moment that light comes on you’re getting punched if you point it at the wrong person. I’d rather have my phone hit out of my hand. Google Glass was not welcome and I suspect the same will be true of this.

wilg 3y ago
> Either way the moment that light comes on you’re getting punched if you point it at the wrong person. Seems not worth worrying about.