How Touch Switches Work
	Most of the switches used today in electronic devices are flipped through a mechanical action. Even the almighty digital computer is still relying on one. Mechanically activated switches however have the disadvantage that they are easily damaged by dirt, excessive moisture or physical mistreatment. So in the last two decades or so, touch sensitive switches started to become even more popular, since they can be completely sealed off from th ... [read more >>]
	12 June 2008, 09:26GMT | (c) 2008 Softpedia

How Touch Screens Work
	There are three ways through which a touch screen display can detect whether or not you are actually touching the display surface and the relative position of the object touching it: the resistive, capacitive or surface acoustic wave system. The resistive system operates by using a design involving a glass layer on top of which a resistive metallic layer is placed. The two layers are separated by spacers and come in contact on ... [read more >>]
	12 May 2008, 08:45GMT | (c) 2008 Softpedia

How Microphones Work
	Often referred to as mike or mic, the microphone first became commercially practical with the invention of the carbon microphone by Thomas Alva Edison in October 1876. Back then microphones were called transmitters. Practically, the microphone is an electronic device capable of capturing minute air pressure waves or sounds and convert them either in an electrical current or an electrical parameter such as electrical resistance, capacitance ... [read more >>]
	08 May 2008, 08:40GMT | (c) 2008 Softpedia