I have a diagram of my Arduino circuit. How do get it ready for PCB manufacture?
You can find the parts on fritzing.org. Anyway. You can get rid of some parts and save money if you pick the right ones. Instead of an Arduino Uno take an Arduino Pro Mini with 3.3V and HC-05 without a breakout for 5V Arduinos.

Doing that everything will smaller and running on 3.3V thus getting rid of the DC-DC converter.