amadjo_01

i think you can go to this page http://www.echoaudio.com/forum/ maybe there are lots of people who can share their ideas with youll ;)

maybe you can download some trial version like proteus (schematic capture,simulation, and PCB design + 3D output view...) ;) ;) ;)

we normally connect the ground (low side) to the negative supply, (only if positive power +, and ground "gnd." , are specified in you're schematic diagram, but, if the schematic diagram tells you that, " +, gnd, -", it means you are going to use a power supply with positive,ground,and negative supply... hope this help!!! :D :D :D

if you are using Proteus software, you can set your PCB by setting first the work area,(in inches or in cenrimeters) then just follow the box, and there you have it, :D