Comments on: Light to sound converter http://hackaday.com/2009/01/04/light-to-sound-converter/ Fresh hacks every day Mon, 23 Nov 2009 02:17:31 +0000 http://wordpress.com/ hourly 1 By: eric http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-58590 eric Sun, 11 Jan 2009 05:44:25 +0000 http://hackaday.com/?p=7502#comment-58590 a quick, simple way to hear modulated light - get a moderately sized photovoltaic (solar) cell and solder a 1/4" plug on the end... plug into a guitar amp, and voila! a quick, simple way to hear modulated light – get a moderately sized photovoltaic (solar) cell and solder a 1/4″ plug on the end… plug into a guitar amp, and voila!

]]> By: cacovsky http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-58217 cacovsky Wed, 07 Jan 2009 19:58:18 +0000 http://hackaday.com/?p=7502#comment-58217 This, with some probable modifications, can be beautifully used by disabled people. This, with some probable modifications, can be beautifully used by disabled people.

]]> By: Tetrafluoroethane http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-58076 Tetrafluoroethane Tue, 06 Jan 2009 14:23:03 +0000 http://hackaday.com/?p=7502#comment-58076 I believe I remember building this when I was about 10. I think it was in the Forest M. Mimms engineers mini-notebooks sold at Radio Squack. Still an interesting project, but surely not worthy of Hack a Day. :( I believe I remember building this when I was about 10. I think it was in the Forest M. Mimms engineers mini-notebooks sold at Radio Squack. Still an interesting project, but surely not worthy of Hack a Day. :(

]]> By: dan http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-58001 dan Mon, 05 Jan 2009 19:46:00 +0000 http://hackaday.com/?p=7502#comment-58001 @fartface I had that kit too, it was awesome! @fartface

I had that kit too, it was awesome!

]]> By: gordon http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57978 gordon Mon, 05 Jan 2009 15:27:28 +0000 http://hackaday.com/?p=7502#comment-57978 There was a tv show called rough science in which they created something similar. They took a can and covered it with tin foil and reflected the sun off it to a photodiode a considerable distance away. If you talked into the can it vibrated the tin foil which in turn was picked up by the photodiode and transformed back into sound waves. It was a nice concept that seemed to have lots of possibilities. There was a tv show called rough science in which they created something similar. They took a can and covered it with tin foil and reflected the sun off it to a photodiode a considerable distance away. If you talked into the can it vibrated the tin foil which in turn was picked up by the photodiode and transformed back into sound waves. It was a nice concept that seemed to have lots of possibilities.

]]> By: fartface http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57965 fartface Mon, 05 Jan 2009 12:54:37 +0000 http://hackaday.com/?p=7502#comment-57965 This circuit is experiment #12 in the Radio shack 2000 in 1 electronics kit. Glad to see that for 2009 we lowered the bar for hack a day submissions. Next up: A transistor is used to increase the power switching load of an IC!!! It's a MIRACLE!!!!! What a Uber Haxor! F34r my 3|173 h4(k1n6 5k1||5!!!!0n3! This circuit is experiment #12 in the Radio shack 2000 in 1 electronics kit.

Glad to see that for 2009 we lowered the bar for hack a day submissions.

Next up: A transistor is used to increase the power switching load of an IC!!! It’s a MIRACLE!!!!! What a Uber Haxor!

F34r my 3|173 h4(k1n6 5k1||5!!!!0n3!

]]> By: Haku http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57964 Haku Mon, 05 Jan 2009 12:19:34 +0000 http://hackaday.com/?p=7502#comment-57964 Someone should put it next to a sound-to-light converter and run away. Someone should put it next to a sound-to-light converter and run away.

]]> By: wtf! http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57953 wtf! Mon, 05 Jan 2009 08:49:59 +0000 http://hackaday.com/?p=7502#comment-57953 i cannot imagine what is so special about this circuit. it converts light intensity variation at the photo diode to current variation feeding into the speaker. it has nothing to do with the wavelength of the light! what is becoming of hackaday!? and all these people about not winning first plce in a science fair..boo hoo! grow up for heavens sake! i cannot imagine what is so special about this circuit. it converts light intensity variation at the photo diode to current variation feeding into the speaker. it has nothing to do with the wavelength of the light! what is becoming of hackaday!? and all these people about not winning first plce in a science fair..boo hoo! grow up for heavens sake!

]]> By: Urza http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57949 Urza Mon, 05 Jan 2009 07:00:42 +0000 http://hackaday.com/?p=7502#comment-57949 My first thought was 'cat /dev/video0 > /dev/audio' My first thought was ‘cat /dev/video0 > /dev/audio’

]]> By: spyman http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57943 spyman Mon, 05 Jan 2009 05:22:33 +0000 http://hackaday.com/?p=7502#comment-57943 reflect a laser on a window some 10 feet away .. place this converter so that the reflected laser falls on the photodiode. reflect a laser on a window some 10 feet away ..
place this converter so that the reflected laser falls on the photodiode.

]]> By: Josh http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57929 Josh Mon, 05 Jan 2009 02:34:32 +0000 http://hackaday.com/?p=7502#comment-57929 wow. look at all the people here who got bumped from an a for a science fair project because the judges deemed it impossible for a student to make a circuit like this, eventhough building the circuit is the simplest part of it. i'm glad i'm not alone in that situation! this is a very nice, basic circuit. glad to see it here. wow. look at all the people here who got bumped from an a for a science fair project because the judges deemed it impossible for a student to make a circuit like this, eventhough building the circuit is the simplest part of it. i’m glad i’m not alone in that situation!

this is a very nice, basic circuit. glad to see it here.

]]> By: Kyle McDonald http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57920 Kyle McDonald Mon, 05 Jan 2009 00:20:09 +0000 http://hackaday.com/?p=7502#comment-57920 Fun project :) "This could possibly be used to measure the wavelengths (frequency??) of different lights" This would require very high-frequency sensing, while this is working with low-frequency variations like 50 Hz / 60 Hz mains hums and remote blinking. "our ears can hear faster than our eyes can see" I understand what you're getting at, but I feel like it's worth clarifying that this doesn't mean our ears get more information. Our ears hear the amplitude of many different frequencies simultaneously every moment from two perspectives, while our eyes see only three frequencies but at many points (again, from two perspectives). Persistence of vision keeps us from perceiving high-frequency changes in light, but that's just because our eyes are specialized in a different way than our ears. Fun project :)

“This could possibly be used to measure the wavelengths (frequency??) of different lights” This would require very high-frequency sensing, while this is working with low-frequency variations like 50 Hz / 60 Hz mains hums and remote blinking.

“our ears can hear faster than our eyes can see” I understand what you’re getting at, but I feel like it’s worth clarifying that this doesn’t mean our ears get more information. Our ears hear the amplitude of many different frequencies simultaneously every moment from two perspectives, while our eyes see only three frequencies but at many points (again, from two perspectives). Persistence of vision keeps us from perceiving high-frequency changes in light, but that’s just because our eyes are specialized in a different way than our ears.

]]> By: Adam Ziegler http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57919 Adam Ziegler Mon, 05 Jan 2009 00:18:31 +0000 http://hackaday.com/?p=7502#comment-57919 @mcclanahoochie I made a similar device back in Junior High (been awhile... I'm a PE now.) (It was a light wave communicator to be specific.) I entered a science fair, and got 3rd place. First place was some bean growing project. I later found out that I got 3rd instead of first because the judges weren't sure if I had actually built the circuit. @mcclanahoochie

I made a similar device back in Junior High (been awhile… I’m a PE now.) (It was a light wave communicator to be specific.) I entered a science fair, and got 3rd place. First place was some bean growing project. I later found out that I got 3rd instead of first because the judges weren’t sure if I had actually built the circuit.

]]> By: localroger http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57914 localroger Sun, 04 Jan 2009 23:27:57 +0000 http://hackaday.com/?p=7502#comment-57914 @mcclanahoochie: [only because my teacher didn't believe I made the circuit myself] People keep asking why I never went back and finished my degree after losing my scholarship because my GPA slipped to 3.49. This kind of crap had a lot to do with it. /derail @mcclanahoochie: [only because my teacher didn't believe I made the circuit myself]

People keep asking why I never went back and finished my degree after losing my scholarship because my GPA slipped to 3.49. This kind of crap had a lot to do with it.

/derail

]]> By: Arthur http://hackaday.com/2009/01/04/light-to-sound-converter/comment-page-1/#comment-57902 Arthur Sun, 04 Jan 2009 21:01:37 +0000 http://hackaday.com/?p=7502#comment-57902 reminds me of a drug i took a while ago. ....What? reminds me of a drug i took a while ago.

….What?

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