Hello,
I want to build a circuit to control volume of my Pc with a pot or rotary encoder.
I have Arduino uno and Nano both clone version. The part when i got stuck is how to communicate Arduino with pc, i know that i should build a software for doing that but still don't know how.
I am familiar with C++,Java.

Thanks

 

Just do it over Bluetooth. Probably the easiest way. The hard part is going to be writing a service that will read Bluetooth transmissions then controlling the volume.

I was going to be doing this same project except I would use a pic and a tablet.

 

BT can be a PITA, I think doing it over serial will be a lot more reliable, and much easier if you're using an arduino that already has a serial to USB bridge on it. Serial over USB on the PC is easy, there are libraries to do all the heavy lifting.

 

I have made one with infrared and work just perfect with a remote. There is a software who do all the thing but it's not made by me the software.
The bluetooth idea is good i will see in future maybe just pass the pot.

 

BT can be a PITA, I think doing it over serial will be a lot more reliable, and much easier if you're using an arduino that already has a serial to USB bridge on it. Serial over USB on the PC is easy, there are libraries to do all the heavy lifting.

Yeah i think it can be done with serial communication but i want every time i turn on the pc not open arduino ide and run a project and so on.
Just plug and play

 

You wouldn't need or use the arduino ide on the PC at all once the software is written. You would write a Windows .exe (I recommend Visual Studio IDE) to run in the background or as a service to receive and parse the serial communications from the arduino, and probably send windows messages to change the volume. If you use bluetooth then you might find a bluetooth profile to use that would allow volume control without having to write any code to run on the windows side, but I suspect the arduino side might be more complex. Try both, see which way you like better!