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SparkFun Electronics will be closed on July 3rd, 2015 in observance of Independence Day. Any orders placed after 2:00pm MT on July 2nd will be shipped out after the weekend. 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 :(