austinphilp:
building a standalone micro controller for a project, have it working fine with a 5v power supply from spark fun http://www.sparkfun.com/products/8269 in order to make it cheaper to reproduce I want the power regulation to be built in to the circuit board so that i can just wire a cord to be plugged straight into a wall socket. anyone have any links to circuits or general advice? as I'm not really sure where to start at all..
I doubt that will make it cheaper but it will be illegal to sell because it has no FCC/CE approval.
Put in a USB socket instead, USB power is everywhere.
Most people will have several USB power supplies at home so you don't need to include one with your device (it doesn't get cheaper than that!) You can offer a version with wall wart as an optional extra.