I recall xda hacking together an app to make an it decoder from a tv remote
Pointing an IR remote straight at a webcam's sensor, sans lens. I wonder if it's possible to use the rolling shutter effect to make a functional IR decoder?pic.twitter.com/we3jWQUUmX
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the only problem might be a short time between the frame captures. In that time, the sensor could be "blind"
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Yeah, but IR remotes repeat anyway (most of the time)... it might be enough for experimentation purposes (obviously you wouldn't want to use this as an actual decoder in production).
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The carrier doesn't matter, only the lower-rate modulation does. You can plug in a simple photosensor into an audio input (20kHz frequency response) and get decodable data out. I've done that to sniff IR in a pinch several times.
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Why not? Somewhat related: http://people.csail.mit.edu/mrub/VisualMic/
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I suspect no because of the gaps between frames... but it looks like it has potential if the shutter angle is 360'!
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