It depends on the current you need, but theres is a Microchip application
note describing this, I believe it is called "Transformerless Power Supply".
It is real simple, but works reasonable well.

Calvin

-----Original Message-----
From: Solon Caceres Moreno <cdmb@MULTINET.COM.CO>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Martes 5 de Mayo de 1998 6:56 PM
Subject: Direct Connection-Power Feed


>Engineers:
>
>For a project based on PIC, How it can be feed from a source of 110 V AC 60
>Hz without using a transformer?
>
>Thanks in advance
>
>
>_________________________________________
>Sol—n C‡ceres Moreno
>Ingeniero de Sistemas UIS
>Gerente C.M. & C’a Ltda.
>e-mail: solca@usa.net
>              cdmb@multinet.com.co
>tel: (57-7)6347873
>Colombia, South America
>