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LDMA - laser beam measured distance from cellphone
laser beam from cellphone can measure from one point to another through calibration points
Acoustic Ruler
http://gizmodo.com/...ne-like-a-submarine
[DIYMatt, Apr 10 2013]
[link]
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//laser beam measured distance from cellphone
laser beam from cellphone// |
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So, a hybrid between two cellphones and two laser
rulers? |
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Erm, do mobile phones come with lasers these days? <cuts to people doing Vader/Skywalker impressions> |
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As [not Morrison rm] annotates, a laser rangefinder
cellphone app is troubled by the fact that most
cellphones don’t have the needed built-in hardware –
a laser. They all do, however, have speakers and
microphones, so should be capable of running an
acoustic rangefinder. OLPC XO-1 laptops came with
such an app. Acoustic rangefinders have much
shorter range than laser rangefinders, though. |
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The acoustic ruler thing doesn't work very well, has
to be said. |
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Personally, I'd sooner have an IR LED on my
smartphone than a laser, with apps to duplicate
various remotes. I have a Re remote plug-on for my
iPhone, but it's a cumbersome alternative to a
simple IR LED. |
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Actually, that gives me an idea... |
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Smart phones have GPS, so distance between two should be determinable to plus/minus a couple of meters. Is the laser idea to do better than that? If so, need to specify precisely how it would work. [withholding+] |
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I think the Apple Newton had an IR diode ... you could teach it to emulate any IR remote control. |
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How about a smart-phone which fires very small rockets? |
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Simply fire one of the small rockets (with a teeny black-powder+magnesium warhead) at the distant object/person, compare the impact flash/sound of small explosion to get the distance. |
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Can be done in Android, iPhone or Katyusha (for the prolific measurer). |
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