Hello all, > Declan Moriarty wrote: > > Also be aware that the dc/dc converter will give a floating voltage, > i.e. it can sit at ground or at +100V or wherever you drag it. It would > only have to go a small distance away from zero to cause trouble. > Ground in these devices is usually a plane for insulation purposes, > and not connected to input or output. > > If you have no internal ground in your box, (you seem to be > prototyping) consider earthing the outside of any "D" > connector and providing a ground that way.
> Joe wrote: > > You may be having a problem with ground loops. Try connecting everything to a single grounding point. First of all, thank you for your replies, including Gunther Mannigel (to private email). Earthing the ground of the PCB solves the problem. We use a small switchbox to be able to use one telephone line for multiple devices. The switchbox seems to have trouble with the floating ground of the PCB as a result of the isolated AC/DC adapter. So... Down to earth again! Now I only have to find a smooth way to make the connection to the real world ;-) Thanks again, Elbert Smit. -- Author: Elbert Smit INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
