Push Buttons, is a commonly used control electrical components, used to turn on or off 'control circuit' (where the current is very small), so as to control electric motors or other electrical equipment running the purpose of a switch.
　　Push Buttons three categories:
　　1, normally open button - the button switch contacts open.
　　2, normally closed button - the button switch contacts connected
　　3, NC button - both connected to the switch contacts have broken a button.
　　Also known as keys, a breaker (or switch), or programs used to control certain mechanical functions. In general, the red button is used to stop a function, while the green button, then pass to start a particular function. Button shape is usually round or square.
　　Electronic products have a large Push Buttons that are used the most basic human interface tools, with industry and innovation to enhance the level, the key has changed the appearance of more and more diverse and rich visual effects.
　　Push Buttons How it works:
　　Push Buttons is a manual control of the Master Electric. Mainly used to publish operation command, on or breaking control circuit to control the operation of mechanical and electrical equipment. Button works is simple
　　For the normally open contact, before the button is not pressed, the circuit is disconnected, press the button, normally open contacts are connected, the circuit is also connected; for normally closed contact, the button is not pressed before the contact is closed, press the button, the contacts are disconnected, the circuit also breaking. Since the control circuit needs, but also with more of a button while the action of contact.
　　Push Buttons's very versatile, such as lathes starting and stopping, forward and reverse, etc.; tower crane start, stop, up, down, front, back, left, right, slow or fast run, would require button control.