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I'd like to know that by soldering a circuit board, what causes the potential difference between the soldering iron and the board. Is it just static electricity (like by hands), or is the power source of the soldering station involved somehow?

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    \$\begingroup\$ Why do you assume that there's a potential difference? \$\endgroup\$ – po.pe Feb 25 '18 at 17:39
  • \$\begingroup\$ Do you have a real problem with ESD? as this question here is relevant : electronics.stackexchange.com/q/357812/152903 \$\endgroup\$ – Solar Mike Feb 25 '18 at 17:43
  • \$\begingroup\$ @Humpawumpa Afaik. potential difference is needed for current and ESD itself is a short duration current. \$\endgroup\$ – inf3rno Feb 25 '18 at 18:22
  • \$\begingroup\$ @SolarMike I don't have real problems with it currently, the question is just theoretical. The other question is related ofc. \$\endgroup\$ – inf3rno Feb 25 '18 at 18:22

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