Radio experimenters often need a variable capacitor to tune their circuits, as the saying goes, for maximum smoke. In decades past these were readily available from almost any scrap radio, but the ...

In August of 1859, astronomers noticed an unusually large number of dark spots on the sun’s surface. One of those observers ...

BHPian Chhanda Das recently shared this with other enthusiasts:Alternative way to power car keys and home remote ...

Prepare for your ISC Class 12 Physics half-yearly exams with 2025 sample paper. Practice with a realistic test simulation, ...

Polyvalent heat pumps can provide year-round climate control by delivering both heating and cooling, often with the added ...