Hi. Because I want use one program to turn on/off light LED in my room. And:
I have now 2 tape LED's + sensor IR(with remote) = and this all is connected with controller. And I don't know where I can connected my Arduino to this controller 
Here is my photo this. Cable: on top right is IR sensor (this blue wire: DATA from this sensor) on top left LED's, down is Power.
It's just an 'open drain' LED driver using three N-channel MOSFETs. You could cut the traces to the existing microcontroller (maybe desolder it altogether), and connect some wires to the 470R (471) resistors (see attached schematic) to connect them to 3 I/O pins of the Arduino. Then connect the ground of the Arduino to the ground of the circuit, and the 5V of the Arduino to the output of U1 (LM78L05). You can connect the data pin of the IR receiver to any digital pin of the Arduino.
So this MOSFETs desolder, and solder to my board looks on your schematic?
No, the MOSFETs are already wired like the schematic, I would desolder that microcontroller. (If you're planning to use your Arduino only, of course, you won't be able to use the driver like before.)
If you want to desolder the MOSFETs to put them on your own board, you could, but I'd suggest you use this schematic (see attachment) instead.
Also, there's already a 5V regulator on the controller board, so you could use that one.
Fine. I want use Arduino to On/Off LEDs and with remote IR change color LEDs. So I must desolder that microcontroller to this? Or is some pin where I can connect my Arduino?
You can't have two microcontrollers connected to the MOSFETs at the same time, they would interfere with eachother, and this would probably fry your Arduino. So you'll need to get rid of the old microcontroller if you want to use it with the Arduino.
Or I can connect Arduino to MOSFETs ? 
Yes, that is what I meant, connect the Arduino (through the resistors shown in the schematic) to the MOSFETs.
Resistor 4 Band Colors are: yellow purple and red?
And this U1 what is it. This is Arduino Uno or some regulator Voltage?
kev123:
Resistor 4 Band Colors are: yellow purple and red?
No, yellow purple and brown, but you don'n need them, they are already on the board you showed me in the picture you posted. They have 471 (47 * 10^1) written on them.
kev123:
And this U1 what is it. This is Arduino Uno or some regulator Voltage?
It is a 5V voltage regulator, it's in your picture as well.
I see
This 5V from Arduino Is indifferently how I connect? And on this controller writes 12V need.
You can either connect the 12V from the LED driver board to the Arduino's Vin pin, or the output from U1 to the 5V pin of the Arduino. Just make sure you measure it before you connect it, if it is more than 5V, you will fry your Arduino. The first one (using Vin) is the safest option.
Connect the ground of the Arduino to the ground of the LED board. If you don't know the connections, look up the pinout of U1 in the datasheet.
Okay, if first option is safest I use this.
And from Arduino VinPin I must connect to LEDs controller but where? To VCC from LEDs (left top on my photo).
After the diode in the bottom left corner. So you should have the input barrel, then the diode, and then the Arduino's Vin pin. (Connect it to the side of the diode that fell off the picture.)
After the diode in the bottom left corner
This is R1 (201) and connect from side top or bottom?
And the 470R (471) resistors connect from side bottom, yes?
kev123:
This is R1 (201) and connect from side top or bottom?
To the bottom of D1, or to an accessible solder pad connected to that point.
kev123:
And the 470R (471) resistors connect from side bottom, yes?
The bottom side, yes.
To the bottom of D1, or to an accessible solder pad connected to that point.
This red or blue (on new photo 1). If blue I can in the back this connect (on new photo 2)
Where's new photo 1?
Sorry, now is
