Electronic Sensors

electronic sensor is a sensor that tells this information about itsenvironment by creating an electrical signal. This signal should change asthe thing it is measuring changes.

In your house you have a thermostat which controls the heat. It measuresthe temperature of the house, and converts this to an electrical signal.This signal is then sent down wires, back to the heater itself. When thesignal says its too cold, the heater comes on.There are many different things to measure heat, light, humidity, soundlevel, weight etc etc. each of these requires a different sensor. just howthis sensor converts say weight, to electricity, is a story of its own, andeach sensor has this physics. It can be simple or complicated. But in theend they convert their signals to something that can be sent down a wire, orsent over a radio wave etc etc