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Climate Scientist Eric Steig's reaction to the announcement that former climate skeptic Richard Muller recently confirmed that the earth is in fact warming is perhaps best captured by this classic XKCD comic. As Steig put it at RealClimate: As far as the basic science goes, the results could not have been less surprising if the […]

Passive Filter Circuits: This instructable is intended to show you how to make several different filter circuits, in particular, low pass and high pass filters, along with a discussion of notch/trap filters and bandpass filters. What are Filters? So what is a fi…