Informal experiment in IR detection

Click For Summary
SUMMARY

The discussion centers on an informal experiment demonstrating that Android cameras can detect infrared (IR) signals from remote controls, while iPhone cameras do not. The experiment involved various devices, including a Sharp laptop projector remote and a Time-Warner Cable remote, which were successfully detected by a MacBook webcam and an iPod Nano. This suggests that remotes controlling multiple devices may emit a broader IR signal, enhancing detection capabilities across different cameras.

PREREQUISITES
  • Understanding of infrared (IR) technology and its applications.
  • Familiarity with camera specifications and filtering mechanisms.
  • Basic knowledge of remote control functionality.
  • Experience with testing and observing electronic devices.
NEXT STEPS
  • Research the differences in camera technology between Android and iPhone devices.
  • Investigate the principles of infrared signal transmission and detection.
  • Explore the specifications of various remote controls and their IR emission capabilities.
  • Learn about the impact of camera filters on IR light detection.
USEFUL FOR

Electronics enthusiasts, educators conducting experiments in technology, and individuals interested in the functionality of cameras and remote controls.

Fewmet
Messages
405
Reaction score
37
One of my high school students recently demonstrated that the camera in an Android will detect the IR signal of a remote control, but the camera in an iPhone will not. (I understand that screening out IR is desirable in photography, and the distinction is arguably a matter of camera or filter quality.) It led us to try out the other devices on hand and wonder about the behaviors of other devices and other remotes.

If you are willing, please look at one or more remotes through camera(s) on your device(s) and post whether or not you can see the light from the IR bulb.

For example: the remote for my lab's Sharp laptop projector is detected by the webcam on my MacBook.
 
Physics news on Phys.org
A little more data (in hopes of eliciting more responses):
a) Neither the iPod Classic or Nano were tested picked a bulb removed from a remote (the student did not know the maker of the remote)
b) I tired the remote (which bears only the name Time-Warner Cable) that operates my VCR, Cable box and TV has two lights on it. They are detected by my iPod nano and by mmy MacBook webcam.

This (taken with the earlier observation that the iPod Nano picked up another IR bulb) is consistent with speculation that a remote which operates multiple devices has a wider IR range.
 

Similar threads

  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 24 ·
Replies
24
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 6 ·
Replies
6
Views
8K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 3 ·
Replies
3
Views
7K