I have tried 5-6 times to make it and nothing ... dont work.

Can one node work independently ?

Where and what to search?

All Led`s are OK .
Power suply OK.
...
I changed oamp. photodiode and still nothing

I should remind you that this is officially an advanced, unsupported project.

Now, "It doesn't work" isn't actually helpful in understanding the problem, nor is how many times that you've tried.

There are a lot of things that could go wrong, particularly depending on what components you are using.

If you understand how op-amps work, you should be able to begin narrowing dow the problem, starting at the first stage and working towards the end, watching how the input voltage corresponds to the output voltage, and making sure that the output voltages are sufficient and reasonable to safely drive your LEDs.

I put together one node, with another power suply, and now works only one side of the LEDs. Power suply is +30V 1k gnd 1k -30V.

All parts are like in the your design.

>Power suply is +30V 1k gnd 1k -30V.

That doesn't sound like one of our power supplies; where did you get those figures?

It isn`t your power supply. It is made in China - JPS 3003d, 0-30V 2A. I tried to connect + to + , GND to GND and - to - contact but this node isn`t working.

Only one side of 14 LED works. It reacts when I move my hand over the photodiode, so to reduce light. On the other side of LED`s is not working

I disconected gnd from the power suply and then LED on the other side lights up when i move hand over photodiode.

When I said that it doesn't sound like one of our power supplies, I meant that our project was designed for a +/- 15 V power supply, not a +/- 30 V power supply like you had indicated. I wasn't suggesting that it was or was not one that you had gotten from us-- we don't sell anything like either of those.

The Interactive LED Dining Table is amazing,we are so interest in it.We are going to buy material to make a table like yours by ourselves.
Could you supply the circuit diagram of the table to us?When first time we would like to make the table totally like yours.And will do some change after the first try sucess.
Thanks!

Quote by: Sarah Ling

The Interactive LED Dining Table is amazing,we are so interest in it.We are going to buy material to make a table like yours by ourselves.
Could you supply the circuit diagram of the table to us?When first time we would like to make the table totally like yours.And will do some change after the first try sucess.
Thanks!

The project is not open-source. No circuit diagrams or PCB designs are available for this project.

Assuming this isn't just a spam posting, which is what it looks like...

This particular project has not been released as open source; we did release a similar project, the Interactive LED Dining Table, though: http://www.evilmadscientist.com/article.php/diningtablecircuit