November 10, 2008
News - Kill A Watt
about 6 years ago
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.
Better than a remote controlled switch is a “Smart Strip”. They have one sensing plug for your computer or TV. When you turn off that device it turns off all of the other outlets (speakers, printer, router, etc).
I was going to try to figure out how to build one but then I found out they already exist. Mine works great.
No public wish lists :(
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