Arduino LED communication

[Matheusdiodo]

using a led as photodiod? omg i ddin't know that was possible :o

[floris2burn]

@Matheusdiodo

Yeah, I was wondering the same. Here I am, just having bought a couple of photodiodes (IR though).

[kwebber1234]

all you need to do now is make a translator....

[michaels6speed]

arduino.cc open source FREE!!!  Try it

[axel1973w]

Using simple LED as a Photodiode ?!? In Blocking direction or what?

[jsbach333]

very smart.

[bazza4288]

next you should do it with lasers :D

[Labortablo]

Nice! i can't get the source code, only a 404 error when i follow the lik. Is there any other way to get the source code? Thank you.

[Labortablo]

Nice! I can't get the source code. When i follow the link i get a 404 error. Is there any other way to get it? Thank you.

[dodgedart74]

2 year old video doubt you even use your arduino anymore.

[danielkachal]

WOW... i didn't know that .... nice .....

[TopARO]

Hey! I tried the link, no help. Could you send me the code and a short explanation?

[hideroma29]

awesome !!

I would like to read this sorce code.

how can i get this ?

[ekhamburg]

yes, that would be great

[cassianorabelo]

Really nice! Unfortunatly the link for the source code is dead. Do you mind sharing it again? Thanks a lot.

[sgtkim9]

I am trying to make similar things. so I used atmega board and c code. Unfortunately my LED can't sense another LED light. Should I use more bright LED? give me some advice. sorry for poor English.

[thiage]

Wow, that is very cool. Nicely done!

[randomskk]

thanks!

[blackheart0202]

hi buddy.......

i wana make it project can u give me some idea plz

[Russoft]

that is so very awesome. Any chance there's a schematic, or do you need those fancy USB boards...whatever they are that you're using.

can normal LEDs be used as photodiodes?

[randomskk]

I use those USB boards, arduinos, as I had them handy at the time and was still playing with them. However, it can be done even with just an ATtiny13 or anything with GPIO pins, such as a PICAXE 08 or a PIC12F series.

The basic idea is to connect BOTH pins of the LED to an IO port, then reverse bias the LED and check it after a fixed period of time, if it's bright then the LED will read 0 and if it's dark it'l read 1 - there's more info on how this works online.

[G0IFI]

@randomskk Interesting. What's the reverse bias voltage? Have you found a voltage that gives optimal sensitivity? Any LEDs better than others? Sorry for the barrage of questions..

[jim3uk]

Nice, I espcialy like the Cybertool in the BG :) do you have a project site for this? I'd love to look over the source and see more pics.

[randomskk]

I don't have a project site for this one, as I started the site after making this, but I do plan to continue the idea and will probably post about the new implementation on my site, negativeacknowledge (google it). I've updated the video description to include a link to the source code.

[rfmaster93]

very good idea, if you can add upon it, to make it be able to push more info through...