Hi everybody, it is kinda silly, but I just wanted to boast a bit and say that I designed, made and manually assembled the first board in my life! Soldering joints look ugly, but it works!! The size is 2.5x4cm, it has a built-in headphone amp which doesn't require output capacitors at all, it has 3 pots, and 2 buttons. Just want to say lots of thanks to everybody, who helped me with advice and concern. Thank all of you guyz!!