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Introduction to Analog and Digital Signals
In electronics, signals are considered time-varying quantities that carry information. They can represent physical parameters such as voltage, current, or electromagnetic waves and are used to transmit data between components in a system. Signals are broadly categorized into two types:…
Op-amp Comparator: Configurations and Applications in Circuits
Op-amp comparators are circuits that use an operational amplifier (op-amp) in an open-loop configuration (without negative feedback) to compare two input voltages. The op-amp’s output rapidly saturates to either the positive or negative supply rail, depending on which input voltage…
What is Voltage Follower (Buffer) in Op-amp
A voltage follower, also known as a buffer, is a configuration where an operational amplifier (op-amp) is set up to have a voltage gain of 1. This means the output voltage follows the input voltage, hence the term “voltage follower.”…
What is a Zener Diode Used For? Key Applications Explained
A Zener diode is a special type of semiconductor diode designed to allow current to flow not only in the forward direction but also in reverse under specific conditions. What makes it unique is that it is heavily doped to…
What is a Capacitor? A Complete Guide for Beginners
Capacitors are circuit components that store electric charge when a potential difference is applied across their terminals. This ability to store charge is called capacitance (C) and is measured in farads (F). One farad is equivalent to one coulomb of charge…
How to Read a Schematic Circuit Diagram
A schematic diagram is a simplified representation of various circuit elements. It uses lines and standard graphic symbols to depict the interconnection of components and other parameters. Nowadays, software like Fritzing and Tinkercad uses realistic pictures to represent different components…
Grounding Basics: What is Ground in Electronic Circuits
If you’re working on a circuit and you don’t know where the ground is, the first step is to consult the schematic diagram. The ground is usually (but not always) marked with a symbol that looks like a series of…
Field-Effect Transistors (FETs) Explained: Types and Applications
Unlike bipolar junction transistors (BJTs), which control current using current, FETs control current using an electric field. This distinction also makes them integral to a variety of electronic applications because of their high input impedance and low power consumption. What…
Bipolar Junction Transistors (BJTs): NPN Vs. PNP
Transistors, often hailed as the building blocks of modern electronics, play a pivotal role in amplifying or switching electrical signals. In this discussion, we will dive deeply into bipolar junction transistors (BJTs), particularly focusing on their two types: NPN and…
How Does a Diode Work in a Circuit
You can play the audio version of this article. This podcast episode discusses the fundamentals of diodes, including: How they work Biasing Preventing reverse current Rectification in power supplies Diodes are essential and widely used components in electronics. They play…