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 Fri, 10 Feb 2012 15:59:24 +0000 hourly 1 http://wordpress.com/ By: Layla Collins http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-141571 Tue, 11 May 2010 20:56:12 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-141571 Led lights are great because they are long lasting and consumes less electricity.:’;

]]> By: Nathan http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-132169 Fri, 26 Mar 2010 22:32:13 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-132169 Interesting, interesting.
Going to rebuild the iDropper thing with a SOIC Attiny13, an SMD LED and a tiny button cell.
See if I can get the size down a bit, and maybe hack a monitor’s on/off LED and hook another Attiny13 to the monitor’s DDC channel for communication to it (DDC2 is just I2C)
Voila, easy communication with cheap iDropper devices.
Use it for auth, use it for doorlocks, use it for anything!

–Nathan

]]> By: Deyjavont http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-117732 Sat, 16 Jan 2010 09:40:03 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-117732 If you think using LEDs for input it groundbreaking (although mentioned in the 70s) then look into Memristors (also hypothesized in the 70s, found a couple years ago by HP labs.) It’ll blow your mind.

]]> By: Dan http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-117630 Fri, 15 Jan 2010 21:00:56 +0000 http://hackaday.iheartcashews.com:8181/2006/02/21/low-cost-sensing-and-communication-with-an-led/#comment-117630 Did anyone else catch the engadget, et al post about Apple’s patent to use individual pixels as touch sensors? That was for capacitive multitouch, but given this, couldn’t any oled panel provide feedback?
It would have to be calibrated so that a touch is registered by the total occlusion of light to the diode. If not practical for touch interfaces (e.g. bad signal/noise) it could at least eliminate the need for additional ambient light sensors, or proximity (face) detectors on phones.

]]> By: steve http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-70563 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

]]> By: static http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-49740 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.

]]> By: ebidk http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-49281 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.

]]> By: Phobia http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-17297 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.

]]> By: mike http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-17296 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

]]> By: Vdawg http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-17298 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!

]]> By: Vdawg http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-17299 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!

]]> By: enterrupt http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-17300 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.

]]> By: Joshua Green http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-17301 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.

]]> By: justdiy http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-17302 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

]]> By: AL http://hackaday.com/2006/02/21/low-cost-sensing-and-communication-with-an-led/comment-page-1/#comment-17303 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.

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