Many residential and commercial buildings across the United States have heating and cooling systems which are controlled by thermostats, usually an electronic instrument which is designed to detect ...

WHEN the temperature during an industrial process must be kept constant it is more economical to do it automatically than by hand, and in a thirty-page pamphlet issued by Messrs. Negretti and Zambra ...

Analog circuits have had their day; everything is digital now. However, here’s a simple analog circuit built with one good, old, but still available pulse-width-modulating regulator chip. The ...