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Article #1289Re: Tingles from power supply
From: FunkyPunk FieldEffectTrollsistor
Date: Wed, 11 Mar 2009 01:21
Date: Wed, 11 Mar 2009 01:21
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On Tue, 10 Mar 2009 18:16:41 -0800, Robert Baer <robertbaer@localnet.com> wrote: >Sylvia Else wrote: >> I've recently bought a D-Link DIR-300 wireless router. While >> disconnecting its power supply from it, I got a tingling sensation when >> I touched the plug (to be clear, I'm talking about the 5V DC plug, not >> the mains plug). >> >> An AVO meter shows about 90V AC to earth from either side of the 5V >> plug. Short circuit current to earth is about 0.1mA. >> >> Still, I thought these things were meant to be completely isolated. Has >> there been a change of approach? >> >> Sylvia. > Sounds line that wall wart is a transformer rather than a switcher >supply. > A bit messy adding a ground line which shoud connect to the >transformer laminations. Also likely not to have a line filter incorporated at all as well.
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X-Google-Thread: 112d1e,5985c699c60fb1f8 X-Google-Thread: 103407,5985c699c60fb1f8 X-Google-Attributes: gid112d1e,gid103407,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news2.google.com!news1.google.com!npeer03.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post02.iad.highwinds-media.com!newsfe14.iad.POSTED!7564ea0f!not-for-mail From: FunkyPunk FieldEffectTrollsistor <FunkShunPoignter@yermomma.org> Newsgroups: sci.electronics.design,aus.electronics Subject: Re: Tingles from power supply Organization: SmokeOnTheWatter.org Reply-To: HackersDream@yercpu.org Message-ID: <2g4er4dpng75mfps0dhn3i4acoiccnivin@4ax.com> References: <00b89736$0$7237$c3e8da3@news.astraweb.com> <l-mdnUMjnsFjjSrUnZ2dnUVZ_hGcnZ2d@posted.localnet> X-Newsreader: Forte Agent 4.2/32.1118 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 22 NNTP-Posting-Host: 72.197.142.200 X-Complaints-To: newsmaster@cox.net X-Trace: newsfe14.iad 1236734506 72.197.142.200 (Wed, 11 Mar 2009 01:21:46 UTC) NNTP-Posting-Date: Wed, 11 Mar 2009 01:21:46 UTC Date: Tue, 10 Mar 2009 18:21:41 -0700