 It is based upon the digital design methodologies and consists of digital circuits, IC’s and logic gates.  It uses only binary digits, i.e. either ‘0’ or ‘1’ ! 3.

Recognize that PowerPoint slides are useful for creating digital presentations. Know that you can develop digital presentations in class wikis, in Word files that are submitted through e-mail, in course management systems, in personal websites, and on films posted on the Internet or burned to a DVD.

Digital describes electronic technology that generates, stores, and processes data in terms of two states: 1 and number 0.  A modem is used to convert the digital information in your computer to analog signals for your device and to convert analog signals to digital information for your computer.

Topics :

• Number System and Representation.
• Programs.
• Boolean Algebra and Logic Gates.
• Gate Level Minimization.
• Combinational Logic Circuits.

Digital electronics deals with the electronic manipulation of numbers, or with the manipulation of varying quantities by means of numbers. Because it is convenient to do so, today’s digital systems deal only with the numbers ‘zero’ and ‘one’, because they can be represented easily by ‘off and ‘on’ within a circuit.

Many of our household items make use of digital electronics. This could include laptops, televisions, remote controls and other entertainment systems, to kitchen appliances like dishwashers and washing machines. Computers are one of the most complex examples and will make use of numerous, complex circuits.

Digital Electronics is very important in today’s life because if digital circuits compared to analog circuits are that signals represented digitally can be transmitted without degradation due to noise. Also in digital system information stored is easier than that of analog system.

Digital circuits are the most common mechanical representation of Boolean algebra and are the basis of all digital computers. They can also be used to process digital information without being connected up as a computer.

This includes devices such as the following:

• desktop computers.
• laptop computers.
• mobile phones.
• tablet computers.
• e-readers.
• storage devices, such as flash drives.
• input devices, such as keyboards, mice, and scanners.
• output devices such as printers and speakers.

The corresponding binary voltage levels in digital circuits have two states: a high-voltage state denoted VH corresponding to logical 1 and a low voltage state denoted VL corresponding to logical 0. In electronic digital systems, a transistor is used as a switch.

There are actually 5 main types of electrical circuits: Close circuit, open circuit, short circuit, series circuit, and parallel circuit. Each type of circuit is designed to create a conductive path of current or electricity.

Current electricity is a constant flow of electrons. There are two kinds of current electricity: direct current (DC) and alternating current (AC).

Series and parallel circuits

• There are two types of circuit we can make, called series and parallel.
• If there are no branches then it’s a series circuit.
• If there are branches it’s a parallel circuit.

Electric Circuit -Types of Electric Circuit. There are 5 Main Types of Electric Circuit – Close Circuit, Open Circuit, Short Circuit, Series Circuit and Parallel Circuit.

parallel circuits

Every circuit is comprised of three major components:

• a conductive “path,” such as wire, or printed etches on a circuit board;
• a “source” of electrical power, such as a battery or household wall outlet, and,
• a “load” that needs electrical power to operate, such as a lamp.

A simple circuit definition is a closed loop of a conductor that electrons can travel around, usually consisting of a power source (a battery, for example) and an electrical component or device (like a resistor or a light bulb) and conducting wire.

Voltage: Voltage is equal across all components in a parallel circuit….From this definition, three rules of parallel circuits follow:

• All components share the same voltage.
• Resistances diminish to equal a smaller, total resistance.
• Branch currents add to equal a larger, total current.

A circuit diagram (also known as an electrical diagram, elementary diagram, or electronic schematic) is a simplified conventional graphical representation of an electrical circuit. Arrangement of the components interconnections on the diagram does not correspond to their physical locations in the finished device.