<center><a href='https://dtube.video/#!/v/eevblog/kxyafe8k'><img src='https://dtube1.gateway.ipfsstore.it:8443/ipfs/QmWERTo4x6qaPSbCWohGrf13a9F2jzy8v9vyUSmr3g5NP7'></a></center><hr>Trivia time. Dave explains one of the reasons why annoying centre negative DC power jacks exist.
Forum: http://www.eevblog.com/forum/blog/eevblog-1015-beware-evil-(but-clever)-dc-jacks/

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