Analog vs. Digital

    Most electronics enthusiasts generally fall into one of two camps: digital or analog. As you must already know, digital circuits are comprised of voltages that are either On or Off, which in computerese is referred to as One and Zero. A good example here would be your emergency flashlight -- it's either turned on or it isn't.

    Analog circuits, on the other hand, can contain a range of possible values, for example the voltages traveling through an audio amplifier that powers a loudspeaker. On soft passages of music, the voltage produced is very small and the speaker moves back and forth only slightly. But when the music becomes louder, the voltage and movement will be that much greater. With audio, though, how quickly the speaker moves is also a factor.