Variable capacitors may be useful, but the air gap that provides their capacitance is their greatest weakness. Rather than deal with the poor dielectric properties of air, some high-end variable ...

Discover how to build a simple device that converts light into electricity using LEDs and diodes. This step-by-step guide demonstrates assembling an LED-diode cluster, connecting it to a capacitor for ...

Variable capacitors may be useful, but the air gap that provides their capacitance is their greatest weakness. Rather than deal with the poor dielectric properties of air, some high-end variable ...

Variable life insurance, also called variable appreciable life insurance, provides lifelong coverage, as well as a cash value account that you get to decide how to invest. Variable life insurance ...

Delia Smith's creamy homemade mayonnaise should be stored in a screw-top jar in the fridge for no longer than a week. First of all, put the egg yolks into the basin, add the crushed garlic, mustard ...

Homemade lemon curd is easy to make and so much more mouthwatering than the shop-bought variety. It makes a lovely gift and is much quicker to make than jam or many other preserves. Put the lemon zest ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...