10 Apr '17, 11am

ジップロックにコイン入れて振るとESD発生器になるとかマジかよ An EMC troubleshooting kit - part 2 (ESD immunity) | EDN https://t.co/2jf9pZQuSf @edncomさ…

ジップロックにコイン入れて振るとESD発生器になるとかマジかよ An EMC troubleshooting kit - part 2 (ESD immunity) | EDN https://t.co/2jf9pZQuSf @edncomさ…

It also occurred to me after making what I called a “shock box” in high school, that a 12V power transformer connected to a 1.5V or 3V battery would also make an quick and dirty ESD simulator. Depending on the transformer, you can obtain 1,000 to 10,000 volts output at 2 to 5 ns edges by momentarily making and breaking the battery connection. I would definitely NOT try connecting the output of this directly to any circuit boards - just probe on the outside of your shielded product enclosure just as you would with a real simulator. You should be able to see a small arc as you hold the probe wire near to the chassis enclosure or to the grounding shell of I/O connectors. The disadvantage of this circuit is that the output voltage varies and the level is uncontrolled. While it can give an indication of potential issues, DO NOT depend on this method for accurate results! For th...

Full article: http://www.edn.com/electronics-blogs/the-emc-blog/4378166...

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ednjapan.com 16 Apr '17, 9am

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