Digital Electronics is the counterpart of Analog Electronics and it deals with digital circuits that operate using digital or discreate signals. A typical digital circuit can be designed using basic elements like Transistors, Logic Gates, Flip-Flops or even using complex elements like microcontrollers, microprocessors and other computing chips. This section consists of a huge collection of basic digital circuits with schematics and detailed explanation, to help you build digital electronic projects. You can also check out the Embedded Electronics section for advanced digital circuits that are designed using microcontrollers and microprocessors.
The term Multiplexer which is also commonly called as “MUX” or “MPX” refers to selecting one output of the many available inputs. Professor Shankar Balachandran (IIT-M) explains multiplexing as the method of transmitting a large number of information units over a small number of channels or lines and a Digital Multiplexer is a combinational Logic circuit that selects binary…
In previous tutorials, we have seen how computer use binary numbers 0 and 1 and by using an adder circuit computer will add those digits to provide SUM and Carry Out. We have already covered Half Adder and Full Adder circuits in previous tutorials. Today we will learn about Subtractor circuits. Subtractor circuits use this binary numbers 0, 1 and calculate the subtraction.…
Decoder is type of combinational Circuit which decodes a small bit value into large bit value. It is normally used in combination with encoders which does exactly the opposite of what a decoder does, so read about Encoders here before you proceed with Decoders. Again just like Encoders there are many types of Decoders as well but the number of output lines in a decoder will…
Encoders, as the name suggest, encodes a larger bit of information into a smaller bit value. There are many types of encoders based on the number of inputs and outputs and based on how it operates. But every Encoder has one underlying rule, the number of output lines on an Encoder will always be less than number of input lines. We will learn more about encoders, what is…
Computers use binary numbers 0 and 1. An adder circuit uses these binary numbers and calculates the addition. A binary adder circuit can be made using XOR and AND gates. The summation output provides two elements: the first one is the SUM, and the second one is the Carry Out.
When we use the arithmetic summation process in our base 10 mathematics,…
Shift Registers are sequential logic circuits, capable of storage and transfer of data. They are made up of Flip Flops which are connected in such a way that the output of one flip flop could serve as the input of the other flip-flop, depending on the type of shift registers being created.
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The term digital in electronics represents the data generation, processing or storing in the form of two states. The two states can be represented as HIGH or LOW, positive or non-positive, set or reset which is ultimately binary. The high is 1 and low is 0 and hence the digital technology is expressed as series of 0’s and 1’s. An example is 011010 in which each term…
The term digital in electronics represents the data generation, processing or storing in the form of two states. The two states can be represented as HIGH or LOW, positive or non-positive, set or reset which is ultimately binary. The high is 1 and low is 0 and hence the digital technology is expressed as series of 0’s and 1’s. An example is 011010 in which each term…
The SR flip flop using NAND gate truth table is a basic sequential logic circuit that holds one bit of digital information. This extensive guide goes over the general SR flip flop circuit diagram with explanation, a discussion of the truth table, and its implementation using IC SN74HC00N. If you want to become proficient in digital electronics and sequential circuit design, it's important to…
A "Clap On Clap Off" switch is an interesting concept that could be used in home automation. It works as a switch which makes devices On and Off by making a clap sound. Although its name is “Clap switch”, but it can be turned ON by any sound of about same pitch of Clap sound. The main component of the circuit is the Electric Condenser Mic, which has been used…
Schmitt Trigger gate is a digital logic gate, designed for arithmetic and logical operations. It provides OUTPUT based on INPUT voltage level. A Schmitt Trigger has a THERSHOLD voltage level, when the INPUT signal applied to the gate has a voltage level higher than the THRESHOLD of the logic gate, OUTPUT goes HIGH. If the INPUT signal level is lower than THRESHOLD, the…
XNOR or EX-NOR gate is a digital logic gate, designed for arithmetic and logical operations. Here we are going to use 74LS86 chip for demonstration, this chip has 4 EX-OR gates in it. These four gate are connected internally as shown in below figure.
These EX-OR gates are followed by NOT gates. These gates provides…
