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It is that time again! SparkFun Electronics will be closed Friday, January 13th for our annual inventory day. Please keep in mind that any orders placed after 2PM (Mountain Time) on Thursday, January 12th will not ship or be prepared for local pickup until we open for normal operations on Monday, January 16th. In addition, tours will resume on Friday, January 20th. Thank you for your patience!

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mristroph

Member Since: January 1, 2012

Country: United States

  • These are NOT good electrical conductors. The mating surfaces are coated with a very thin layer of some sort of clear polymer; it’s what allows them to spin with little friction. You can sand off the coating, or try to scrape it off, and as it gets worn away, it will provide an intermittent connection. It can be made decently reliable with enough careful sanding.

No public wish lists :(