Electronics Interactive LED wall art. (understood and under construction)

The Interactive LED wall art very interested

 

click for big



@Tec_ - Flecom over at the [H] forums said this:

....which is a bit beyond me thb, I dont understand the part about oscillation.

I'm also not sure about which PSU I should use to provide the correct amperage.

 

Been lurking here for a while but this has intrigued me

Apologies if this is considered hijacking but could anyone explain the basic principle behind this? I'd be interested in giving this a go however I'd rather go with some sort of PIC solution rather than blindly copying someone else's plans!

Thanks!

 

In principle, each circuit has a photodiode, a series of LEDS and inputs/outputs to its neighbors.

The photodiode reads the light value coming to it and compares it to its neighboring circuits.

If the value is lower (darker) then it illuminates the LEDs.

The LED array is wired to give a flickering effect, ie (using the diagram above) the LED illumination will vary from the top 12 to the bottom 12.

 

that's great, nice to know I was at least thinking along the right lines

thanks

 

how is this project going any updates?

 

Your work is amazing

 

Cool!

 

Hi everyone. i am trying to built a table like this with pic16. i finished my demo and i used four pic16 and 80 leds. But i used pir sensors in my project. but pir sensor is not very efficiency. you said photodiode. i will try it with photodiodes again.

can you help me about the sensor algorithm. i didnt understand "The photodiode reads the light value coming to it and compares it to its neighboring circuits. If the value is lower (darker) then it illuminates the LEDs." can you explain it?

i read this topic but all photos were deleted. @Langer can you update the photos,please

 

@ROB 636 - Sorry for my long delay. The project has ben finished for quite some time. Thank you for posting.

@BlueOcean - Thank you very much man.

@_Twist_ - Welcome to Bit-Tech! And thanks for your support.

@EsDorlion - Welcome to Bit-Tech mate. I've just responded to your email, however here's a simplified version of what I was trying to say:

Each node reads the light - it compaires it's reading to the other nodes around it - if the reading is lower (ie there's something covering it) the LEDs will then illuminate. As an added effect, the LEDs lighting up will then cause a pretty 'ripple' effect across the board as the sensors react to the light.

I ended up using a sheet of perforated aluminum and created a wall mounted unit - it lit up as you walked through the breezeway in my apartment.

Since the images are long-gone. I've put together a RAR file for download on my website which contains all the information I have remaining on this project - fortunately this includes the images once posted here.

It can be downloaded here:
http://jesselang.ca/public/led-board.rar

Thank you for your interest.

 

Hey, well done on your project and thanks for the files.
How did your finished project turn out?

Do you have any pics?

 

HI
i'm new here
so many thanks to "Lange" and other friens here
i have a question :
in "Evil Mad Scientist" project they use "LM324" instead of "LF347"
does any one have "interactive LED Table" Schimatic with "LM324"?
thanks in advance