Birthstones: Discover Your Birthstone Color By Month Polished birthstones for each of the 12 months Birthstones and their vivid colors have long been a way to connect your birth month with rare and unique gemstones.
An audio interface is a piece of hardware that expands and improves the sonic capabilities of a computer. Some audio interfaces give you the ability to connect professional microphones, instruments and other kinds of signals to a computer, and output a variety of signals as well.
For an electronic or micro-electronic circuit to be useful and effective, it has to interface with something. Input interface circuits connect electronic circuits such as op-amps, logic gates, etc. to the outside world expanding its capabilities. Electronic circuits amplify, buffer or process signals from sensors or switches as input information or to control lamps, relays or actuators for output control.