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SparkFun will be closed May 25, 2015 for Memorial Day. Orders placed after 2pm on Friday the 22nd will ship out on Tuesday. Thanks!

obso

Member Since: November 10, 2008

Country: United States

  • “But how does it actually measure current? I’ve wondered whether those things have a hall effect sensor, or they just measure the voltage across a small (<1ohm) high power resistor."
    The latter. The big loop of wire you see in the white box just to the left of the receptacle plug in the 3rd picture looks to be what they are using for a shunt.

No public wish lists :(