All About Circuits

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Bipolar Junction Transistors as Switches

Bipolar Junction Transistors as Switches

Solid-state switching circuits usually keep their constituent…


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Tesla Polyphase Induction Motors

Tesla Polyphase Induction Motors

Most AC motors are induction motors. Induction motors are favored due…


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Basic Troubleshooting Strategies

Basic Troubleshooting Strategies

A chandelier has five light bulbs in it, and one of them is not…


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Brushless DC Motor

Brushless DC Motor

Brushless DC motors were developed from conventional brushed DC motors…


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Tesla Polyphase Induction Motors

Tesla Polyphase Induction Motors

Most AC motors are induction motors. Induction motors are favored due…


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SPICE Models

SPICE Models

The SPICE circuit simulation program provides for modeling diodes in…


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Wound Rotor Induction Motors

Wound Rotor Induction Motors

A wound rotor induction motor has a stator like a squirrel cage…


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Stepper Motors

Stepper Motors

Stepper Motor vs Servo Motor A stepper motor is a…


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Calculus for Electric Circuits

Calculus for Electric Circuits

∫f(x) dx Calculus alert! Calculus is a branch of mathematics that…


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AC Motor Theory

AC Motor Theory

Electromechanical watt-hour meters use an aluminum disk that is spun…


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Memory Devices

Memory Devices

Don’t just sit there! Build something!! Learning to analyze digital…


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Servo Motor Systems

Servo Motor Systems

Explain the operation of this “H-bridge” motor control circuit: At…


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Inverting and Noninverting OpAmp Voltage Amplifier Circuits

Inverting and Noninverting OpAmp Voltage Amplifier Circuits

Don’t just sit there! Build something!! Learning to mathematically…


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DC Lab - Potentiometer as a Rheostat

DC Lab - Potentiometer as a Rheostat

In this hands-on electronics experiment, you will use a potentiometer as a variable resistor to control the speed of a motor and learn how to connect a potentiometer as a rheostat.


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The Importance of Electrical Safety

The Importance of Electrical Safety

With this lesson, I hope to avoid a common mistake found in…


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Intermediate Electromagnetism and Electromagnetic Induction

Intermediate Electromagnetism and Electromagnetic Induction

As an electric current is passed through a coil of wire, it creates a…


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DC Generator Theory

DC Generator Theory

Generators used in battery-charging systems must be regulated so as to…


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Single-phase Induction Motors

Single-phase Induction Motors

A three-phase motor may be run from a single-phase power source.…


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Reluctance Motor

Reluctance Motor

The variable reluctance motor is based on the principle that an…


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Fundamentals of Radio Communication

Fundamentals of Radio Communication

What does the acronym RF stand form, in reference to radio-related…


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AC Motor Control Circuits

AC Motor Control Circuits

Perhaps the most challenging aspect of interpreting ladder diagrams,…


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Polyphase Motor Design

Polyphase Motor Design

AC Motors Perhaps the most important benefit of polyphase AC power…


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Introduction to Combinational Logic Functions

Introduction to Combinational Logic Functions

The term “combinational” comes to us from mathematics. In…


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AC Lab - Using a Transformer to Build a 12 VAC Power Supply

AC Lab - Using a Transformer to Build a 12 VAC Power Supply

In this hands-on AC electronics experiment, build a 12 V alternating current (AC) power supply using a step-down transformer and learn about transformer operation and the purpose of tapped windings.


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How to Calculate Power in a Series and Parallel Circuit

How to Calculate Power in a Series and Parallel Circuit

When calculating the power dissipation of resistive components, we can…


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Basic Troubleshooting Strategies

Basic Troubleshooting Strategies

A chandelier has five light bulbs in it, and one of them is not…


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Active Loads in Amplifier Circuits

Active Loads in Amplifier Circuits

We know that the current in a series circuit may be calculated with…


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Design Project: Telegraph System

Design Project: Telegraph System

What voltage will you choose to use for each of the station batteries?


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Si Lab - BJT Common-collector Voltage Follower

Si Lab - BJT Common-collector Voltage Follower

In this hands-on semiconductor electronics experiment, build a voltage follower amplifier using a bipolar junction transistor (BJT) in common-collector configuration and learn about circuit ground and impedance transformations.


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Absolute dB scales

Absolute dB scales

Decibel as Absolute Unit of Power It is also possible to use the…


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Superposition Theorem

Superposition Theorem

Don’t just sit there! Build something!! Learning to mathematically…


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Electric Shock Data

Electric Shock Data

The table of electric currents and their various bodily effects was…


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Voltage Multipliers (Doublers, Triplers, Quadruplers, and More)

Voltage Multipliers (Doublers, Triplers, Quadruplers, and More)

A voltage multiplier is a specialized rectifier circuit producing…


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pH Measurement

pH Measurement

A very important measurement in many liquid chemical processes…


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Microstrip Inductance Calculator

Microstrip Inductance Calculator

This calculator computes the inductance of a microstrip etched on a PCB.


Tools

Programmable Logic Controllers

Programmable Logic Controllers

The Programmable Logic Controller, or PLC, was invented in the late…


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Network Topology

Network Topology

Point-to-Point Connecting two digital devices with a network, would…


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Peak Voltage Calculator

Peak Voltage Calculator

The peak voltage calculator calculates peak voltage values from the peak-to-peak voltage, RMS voltage, or average voltage.


Tools

Finite-state Machine

Finite-state Machine

Feedback is a fascinating engineering principle. It can turn a rather…


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Sum-of-Products and Product-of-Sums Expressions

Sum-of-Products and Product-of-Sums Expressions

Identify each of these logic gates by name, and complete their…


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Properties of Exponents

Properties of Exponents

Product of Powers Property am an = am+n   Power of a Product…


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Band Theory of Solids

Band Theory of Solids

Quantum physics describes the states of electrons in an atom according…


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