Digital Comparator

Suppose we have two binary numbers which we have to compare according to their magnitude. One number of these two numbers can either be greater, equal or smaller than the other number. The digital circuit which performs this comparison task between binary numbers is called digital comparator. For understanding better let us consider two single … Read more

Binary to Gray Code Converter

The logical circuit which converts binary code to equivalent gray code is known as binary to gray code converter. The gray code is a non weighted code. The successive gray code differs in one bit position only that means it is a unit distance code. It is also referred as cyclic code. It is not … Read more

Binary to BCD Code Converter

BCD is binary coded decimal number, where each digit of a decimal number is respected by its equivalent binary number. That means, LSB of a decimal number is represented by its equivalent binary number and similarly other higher significant bits of decimal number are also represented by their equivalent binary numbers. For example, BCD Code … Read more

Digital to Analog Converter or DAC

Op amp is extensively used as main building block of digital to analog convertor. Digital to analog convertor is an electronics device in form of IC, which converts digital signal to its equivalent analog signal. The DAC can be realized in many ways. One of the popular digital to analog convertor circuit is binary weighted … Read more

Analog to Digital Converter

From the name itself it is clear that it is a converter which converts the analog (continuously variable) signal to digital signal. This is really an electronic integrated circuit which directly converts the continuous form of signal to discrete form. It can be expressed as A/D or A-to-D or A-D or ADC. The input (analog) … Read more

555 Timer and 555 Timer Working

555 Timer Integrated Circuit (IC) is a monolithic timing circuit introduced by Signetic Corporation in 1970. This device can be easily configured to produce accurate, highly-stable time delays or oscillations, just by adding a very few extra timing components. 555 timer IC is available as a 8-pin metal can or as 8- or 14-pin or … Read more


Demultiplexer is in fact a circuit which can distribute or deliver multiple outputs from a single input. It can often refer as data distributor or demux. It can perform as single input many output switch. The output lines of demultiplexer are ‘n’ in number, select line number is ‘m’ and n = 2m. The control … Read more


Multiplexer, we can simply say that a circuit which can deliver single output from multiple inputs. It can often refer as data selector or mux. The inputs to this circuit may be Analog or Digital. It is very useful in sending large amount of data over a network with decrease in bandwidth and time. A … Read more

Seven Segment Display

Almost everywhere we can find seven segment display; it is too common so that we often do not notice it at all. From pocket calculators, digital clocks and electronic test equipment to petrol pumps everywhere information is delivered through seven segment display. A single seven segment display or a combination of such display arranged in … Read more