# data[].attributes.body
A semiconductor material has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Semiconductors are the foundation of modern electronics.

# data[].attributes.body
An electrical insulator is a material whose internal electric charges do not flow freely, and therefore make it very hard to conduct an electric current under the influence of an electric field.

# data[].attributes.body
Electrical conductors are Materials that can allow an electrical current to flow through them for this reason most conductors are metal compounds. Some examples of these conductors are:

-Copper -silver -solder -

# data[].attributes.body
Digital electronics, or digital (electronic) circuits, are electronics that represent signals by discrete bands of analog levels, rather than by continuous ranges (as used in analogue electronics). All levels within a band represent the same signal state.

# data[].attributes.body
An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system such as a computer, which converts the electronically generated information into human-readable form.

# data[].attributes.body
Some examples of control systems are:

-Thermostats -TV remotes - Remote sprinklers - Under floor heating They are known as control systems as they remotely control output devices that they are not directly attached to.

# data[].attributes.body
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal, or where several circuits must be controlled by one signal.

# data[].attributes.body
A seven-segment display (SSD), or seven-segment indicator, is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays.

# data[].attributes.body
A Solenoid is a type of electromagnet, the purpose of this is to generate a controlled magnetic field but only when a current is applied

# data[].attributes.body
LCD stands for Liquid crystal display and is often used for high quality output devices like HD TV's. LCD's are more energy efficient and and have been replacing CRT devices since 2008. Other devices using LCD include; calculators, Computer monitors and smart phone displays among others. LCD'S also produce less heat when in use for a long period of time.