Every device that makes use of electricity controllable by an electrical switch of some kind. This is true for the simplest of all electronic devices, such as light bulbs. As well as the most complex machines, such as computers. Both kinds of devices are essential for people to achieve some purpose. In order to control those machines, their users require interface tools that give them control over their devices. Toggles, rotaries, push-buttons and rockers are all examples of such controls.
Types of Electrical switches
Two of the most common types of electric switches are single-pole and double-pole switches. The simplest type of electrical switches is a single-pole (SP) switch. SP switches have two points, called contacts, that connect to make a circuit and separate to break the circuit. Double-pole (DP) switches, in comparison, have two “on” positions and one “off” position. For example, the fan button on kitchen range hoods has a high-off-low configuration where the two “on” positions provide different voltages.
When switched to the “on” position, the switch closes the circuit, allowing again for the continuous flow of electricity through the circuit. Because there are so many different kinds of electronic devices, an equally wide variety of different circuitry options is necessary to accommodate them. Inside a simple electric light, nothing more than wires, a switch and a power source is necessary for the light’s operation. In a computer keyboard, a complex web of circuits embedded on a circuit board is necessary to send signals to an attached processor. For both cases though, switches are control the circuitry.