Comments on: Low-cost sensing and communication with an LED http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/ Fresh hacks every day Wed, 25 Nov 2009 19:37:34 +0000 http://wordpress.com/ hourly 1 By: steve http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-3/#comment-70563 steve Wed, 15 Apr 2009 05:27:01 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-70563 I can't even solder but even I learnt in school that an LED can output light AND sense light.. Even I feel smart after reading these comments :x I can’t even solder but even I learnt in school that an LED can output light AND sense light.. Even I feel smart after reading these comments :x

]]> By: static http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-3/#comment-49740 static Fri, 07 Nov 2008 22:18:29 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-49740 OK using LED in an application where their light output isn't the primary purpose is NOT a hack? Good Lord hackaday isn't going even have a chance to please a few, much less most is it. I'm sure are most like myself will never duplicate few of the hacks as exactly as presented here, but a lot learned goes in a note book. The notebook may be brain matter, paper or electronic. Unlike many publications hackaday costs nothing to view. OK using LED in an application where their light output isn’t the primary purpose is NOT a hack? Good Lord hackaday isn’t going even have a chance to please a few, much less most is it.

I’m sure are most like myself will never duplicate few of the hacks as exactly as presented here, but a lot learned goes in a note book. The notebook may be brain matter, paper or electronic. Unlike many publications hackaday costs nothing to view.

]]> By: ebidk http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-3/#comment-49281 ebidk Thu, 06 Nov 2008 09:31:32 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-49281 @phobia That's a really nice idea actually. I think you could build a mod for your average laptop to use a LED as a sensor and then trigger the hotkeys on the keyboard for changing screen brightness to get a good enough effect. @phobia That’s a really nice idea actually.

I think you could build a mod for your average laptop to use a LED as a sensor and then trigger the hotkeys on the keyboard for changing screen brightness to get a good enough effect.

]]> By: Phobia http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-3/#comment-17297 Phobia Sat, 22 Apr 2006 06:34:47 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17297 I'm not sure if backlights nowadays used LEDS, but I see no reason why a computer couldn't be created that used such a backlight. Imagine a computer screen that checks the light levels and changes it's output accordingly, no more getting blinded by a bright computer screen at night. I’m not sure if backlights nowadays used LEDS, but I see no reason why a computer couldn’t be created that used such a backlight. Imagine a computer screen that checks the light levels and changes it’s output accordingly, no more getting blinded by a bright computer screen at night.

]]> By: mike http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-3/#comment-17296 mike Mon, 17 Apr 2006 09:30:48 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17296 this hack is awsome this hack is awsome

]]> By: Vdawg http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-3/#comment-17298 Vdawg Sun, 16 Apr 2006 02:10:18 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17298 Here's a thought for the ultra-geek. With this technology, imagine enclosing a box with each wall being covered in these sensors, and using it as a way of reading total human body movement... Thing about the Virtual Reality imput possibilities of this? I know it sounds silly, but as I was reading these posts and watching the short films, it seems very doable, albeit expensive. I'm sure we must have a reader with both the time and resources to take on such a task. I will watch with baited breath! Here’s a thought for the ultra-geek. With this technology, imagine enclosing a box with each wall being covered in these sensors, and using it as a way of reading total human body movement… Thing about the Virtual Reality imput possibilities of this? I know it sounds silly, but as I was reading these posts and watching the short films, it seems very doable, albeit expensive. I’m sure we must have a reader with both the time and resources to take on such a task. I will watch with baited breath!

]]> By: Vdawg http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-3/#comment-17299 Vdawg Sun, 16 Apr 2006 01:55:18 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17299 Here's a thought for the ultra-geek. With this technology, imagine enclosing a box with each wall being covered in these sensors, and using it as a way of reading total human body movement... Thing about the Virtual Reality imput possibilities of this? I know it sounds silly, but as I was reading these posts and watching the short films, it seems very doable, albeit expensive. I'm sure we must have a reader with both the time and resources to take on such a task. I will watch with baited breath! Here’s a thought for the ultra-geek. With this technology, imagine enclosing a box with each wall being covered in these sensors, and using it as a way of reading total human body movement… Thing about the Virtual Reality imput possibilities of this? I know it sounds silly, but as I was reading these posts and watching the short films, it seems very doable, albeit expensive. I’m sure we must have a reader with both the time and resources to take on such a task. I will watch with baited breath!

]]> By: enterrupt http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-2/#comment-17300 enterrupt Sat, 25 Mar 2006 03:59:11 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17300 #59: I studied plenty of electronics in my electrical engineering courses. Unfortunately when i was in school the focus was on telecom careers. All the fun stuff (to me) is in the hardware and software development though, and not computer networking. My advice would be to study the curriculums and talk to your advisors early on when it's still easy to change your major. #59: I studied plenty of electronics in my electrical engineering courses. Unfortunately when i was in school the focus was on telecom careers. All the fun stuff (to me) is in the hardware and software development though, and not computer networking. My advice would be to study the curriculums and talk to your advisors early on when it’s still easy to change your major.

]]> By: Joshua Green http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-2/#comment-17301 Joshua Green Fri, 24 Mar 2006 17:30:10 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17301 Hi, I would really like to understand what the heck you guys are talking about. What kind of engineering would I need to major in to do stuff like this. I'm in 12th grade and I plan to major in electrical engineering, but the college I plan on going to has electrical engineering and electronic engineering. Which one would be better for me to major in, because I am really interested in this kind of stuff. Hi,

I would really like to understand what the heck you guys are talking about. What kind of engineering would I need to major in to do stuff like this. I’m in 12th grade and I plan to major in electrical engineering, but the college I plan on going to has electrical engineering and electronic engineering. Which one would be better for me to major in, because I am really interested in this kind of stuff.

]]> By: justdiy http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-2/#comment-17302 justdiy Mon, 13 Mar 2006 07:48:51 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17302 re #57 ... on the 'offical' forrest mims website, there are no publications listed for 1977, but there are some related to the field of optoelectronics published between 1972 and 1982 - perhaps 1977 was given as some sort of median year of reference official list of publications: http://www.forrestmims.org/pages/3/index.htm re #57 … on the ‘offical’ forrest mims website, there are no publications listed for 1977, but there are some related to the field of optoelectronics published between 1972 and 1982 – perhaps 1977 was given as some sort of median year of reference

official list of publications: http://www.forrestmims.org/pages/3/index.htm

]]> By: AL http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-2/#comment-17303 AL Wed, 08 Mar 2006 23:55:48 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17303 which Forrest M Mims III book can i find this project in? a couple people mentioned seeing it in the 1977 publication, but i can seem to find it. i really like this project and i'm going to try using it in a tele-rehabilitation project for one of my classes. also, if any one has written a program for this in Matlab, it would be really helpful if i could take a look at it. which Forrest M Mims III book can i find this project in? a couple people mentioned seeing it in the 1977 publication, but i can seem to find it. i really like this project and i’m going to try using it in a tele-rehabilitation project for one of my classes.

also, if any one has written a program for this in Matlab, it would be really helpful if i could take a look at it.

]]> By: deadmoo http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-2/#comment-17304 deadmoo Sat, 04 Mar 2006 03:27:43 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17304 Just think about bidirectional OLED displays, Multi-touch tablet displays which can scan fingerprints, barcodes, and such that are placed on the screen. Maybe a bidirectional OLED display could even be a webcam too. Just think about bidirectional OLED displays, Multi-touch tablet displays which can scan fingerprints, barcodes, and such that are placed on the screen. Maybe a bidirectional OLED display could even be a webcam too.

]]> By: legend http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-2/#comment-17305 legend Sat, 04 Mar 2006 01:27:56 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17305 this seems like some thing that would be great for us D.J out there this seems like some thing that would be great for us D.J out there

]]> By: Alex http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-2/#comment-17306 Alex Sun, 26 Feb 2006 03:56:04 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17306 ^^ blue leds would not be practical, because- if I correctly read the links the LED can sense a shorter wavelength than its own- so a red LED can capture the most and a blue the least. http://www.sensorsynergy.com/helpfulhints.htm ^^
blue leds would not be practical, because- if I correctly read the links the LED can sense a shorter wavelength than its own- so a red LED can capture the most and a blue the least. http://www.sensorsynergy.com/helpfulhints.htm

]]> By: martin http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-2/#comment-17307 martin Sat, 25 Feb 2006 16:07:20 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-17307 firstly: i don't care if it's not economically viable as a replacement for tablets, keyboards or whatever, this thing is awesome. i want one in blue that does mathmos-style pulsing effects while im not using it, as a secondary input device that looks cool. at least while i'm too poor to afford an eluminex keyboard, that is :) again, to all the people pointlessly dissing this hack because it's supposedly too complex or has no market value at the moment- how economically viable is the psp downgrade, the Xbox beowulf cluster or the geodesic cardboard tent? and how likely is the average hacker to hand build something as involvedas the tiny mp3 player or an r/c tank made from a printer? the purpose of this site isn't to showcase the next big thing in computing/electronics, or to give you how-tos on simple projects (though those are nice), its to let people share what they are doing and give readers some ideas that they might want to use/recreate/modify. firstly: i don’t care if it’s not economically viable as a replacement for tablets, keyboards or whatever, this thing is awesome. i want one in blue that does mathmos-style pulsing effects while im not using it, as a secondary input device that looks cool. at least while i’m too poor to afford an eluminex keyboard, that is :)

again, to all the people pointlessly dissing this hack because it’s supposedly too complex or has no market value at the moment- how economically viable is the psp downgrade, the Xbox beowulf cluster or the geodesic cardboard tent? and how likely is the average hacker to hand build something as involvedas the tiny mp3 player or an r/c tank made from a printer? the purpose of this site isn’t to showcase the next big thing in computing/electronics, or to give you how-tos on simple projects (though those are nice), its to let people share what they are doing and give readers some ideas that they might want to use/recreate/modify.

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