This time last year, we covered an interesting new solar charger that sought to avoid troublesome shadows from window frames, potted plants and household ornaments by sticking to the glass of the ...

If you live in a city, gazing out your window at a brick wall or weed-clogged vacant lot is not uncommon. Suburbanites, too, deal with ugly views—of car-strewn driveways or masonry walls. Anyone can, ...

A tuft of poppies growing underneath a streetlight in the Hollywood Hills blasts unexpected color along the sidewalk, but the real surprise rests behind the tall ficus hedge, inside Judy Horton’s 1925 ...

Editor’s note: I came across this excellent tutorial article on Digital Filter Design and I thought it would be an excellent guide for novices as well as seasoned veterans. I want to thank William H.