: Button switch is a push button switch. This switch also has two parts- (1) an upper part or lid , in the middle of which there is a large hole and through the hole a special part of a button ( Button) comes out. (2) The other is the lower part or Base, which has two terminals. A terminal has a copper plate , which is set with the base. There is another sheet with the other terminal , which also acts as a spring. In the self- conscious state there is a gap between the two leaves. When the air is pressed on the lid, the tip of the upper layer goes down and joins with the lower leaf. As a result, current flows from one terminal to the other through the sheet. There are two types of push-button switches. When one type of switch presses on the batam, the circuit is connected and when the batam is released, the circuit is disconnected. Other types of switches are connected to the circuit by pressing the wires, but the disconnection does not disconnect the circuit. In order to disconnect, you have to press the button a second time. Below the cover and in the middle of the batam is a circular spring , which pushes the batam upwards.