In the last edition of Don’t Fear the Filter, we built up two examples of the simplest and most-used active filter of all time: the two-pole Sallen-Key lowpass. This time, we’re going to put two of ...

A measure of how effectively the filter removed flavor taints, along with the resulting odor taints, that CR added to plain water with minimal intrinsic flavor and odor (the "control" water). The test ...

Water is something we use without a second thought. We turn on the tap to fill a glass, start the dishwasher or get in the shower, assuming what flows out is “good enough.” However in cities like ...

Q: I read an article of yours that talked about adding a filter system to the kitchen sink. In my master bathroom, I often think about filtering my bathroom sink water. What types of filters can work ...

Anybody interested in building their own robot, sending spacecraft to the moon, or launching inter-continental ballistic missiles should have at least some basic filter options in their toolkit, ...

Running your furnace, central air, or heat pump probably constitutes a big part of your utility bill. But it’s a small, often inexpensive part—the air filter—that keeps these heating and cooling ...