While a BCD adder performs decimal addition using binary hardware with correction logic, a BCD subtractor performs the subtraction of one BCD number from another and produces a valid BCD result. This requires additional logic because simple binary subtraction does not automatically produce valid BCD outputs. Digital systems frequently need to perform arithmetic operations such […]
Digital Electronics
BCD Adder Circuit Diagram, Truth Table, Working and Applications
Let’s explore the BCD Adder Circuit and learn how it adds decimal digits using Binary Coded Decimal (BCD), a digital coding system in which each decimal digit is represented using a 4-bit binary number. BCD arithmetic is widely used in digital systems where calculations must remain in decimal form, such as calculators, clocks, and display-based […]
Digital to Analog Converter (DAC) Block Diagram, Working, Types & Applications
Modern electronic systems rely heavily on both digital and analog signals. While microcontrollers, computers, and digital processors handle data in binary (digital form), most real-world signals such as sound, temperature, pressure, and voltage are analog. To bridge this gap, Digital to Analog Converters (DACs) are used. A DAC takes digital input (binary numbers) and converts […]
Analog to Digital Converter (ADC) Block Diagram, Working, Types & Applications
In today’s world, most electronic devices operate digitally, but the signals we experience in the real world—such as sound, light, temperature, and pressure—are analog in nature. To process these signals in microcontrollers, digital signal processors (DSPs), or computers, we need to convert analog signals into digital form. This is where an Analog-to-Digital Converter (ADC) comes […]
Photocoupler (Optocoupler / Optoisolator) – Construction, Working, Types & Applications
In modern electronics, signal isolation between different parts of a circuit is crucial for protection, noise reduction, and system stability. Optocouplers, also known as optoisolators, play a vital role in achieving this electrical isolation while allowing signal transmission. This article provides a thorough exploration of optocouplers (Optoisolator / Photocoupler), including their construction, working principles, advantages, […]
Seven Segment Display: Types, Working, Pin Diagram & Applications
We see numbers displayed on many electronic devices around us, like digital clocks, calculators, microwave ovens, and scoreboards. But have you ever wondered how these numbers appear on the screen? One of the most common ways to show numbers in electronic devices is by using a Seven Segment Display. It is a simple electronic component […]





