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AC Motor Control Circuits

Worksheets - Motors

Perhaps the most challenging aspect of interpreting ladder diagrams,…

TTL Logic Gates

Worksheets - Motors

Counting practice: count from zero to thirty-one in binary, octal, and…

Contactors

Textbook

All About Contactors When a relay is used to switch a large amount of…

Bipolar Junction Transistors as Switches

Worksheets - Motors

Solid-state switching circuits usually keep their constituent…

Three-phase Transformer Circuits

Textbook

Since three-phase is used so often for power distribution systems, it…

Protective Relay Circuits

Worksheets - Motors

Protective relays are special power-sensing devices whose job it is to…

Switch Types

Textbook

Though it may seem strange to cover the elementary topic of electrical…

AC Bridge Circuits

Textbook

As we saw with DC measurement circuits, the circuit configuration…

Programmable Logic Controllers (PLC)

Textbook

Before the advent of solid-state logic circuits, logical control…

Series and Parallel AC Circuits

Worksheets - Motors

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

Contact “Normal” State and Make/Break Sequence

Textbook

Any kind of switch contact can be designed so that the contacts…

DC Motor Control Circuits

Worksheets - Motors

How is it possible to electrically measure the torque output by a…

Encoders and Decoders

Worksheets - Motors

What does it mean, in general terms, to encode something? Conversely,…

Thyristor Application Circuits

Worksheets - Motors

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

DC Generator Theory

Worksheets - Motors

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

The S-R Latch

Textbook

A bistable multivibrator has two stable states, as indicated by the…

The Silicon-Controlled Switch (SCS)

Textbook

If we take the equivalent circuit of an SCR and add another external…

Motor Control Circuits

Textbook

The interlock contacts installed in the previous section’s motor…

Permissive and Interlock Circuits

Textbook

A practical application of switch and relay logic is in control…

Inductive Reactance

Worksheets - Motors

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

Programmable Logic Controllers (PLC)

Textbook

Before the advent of solid-state logic circuits, logical control…

Transformer—Power Supply

Textbook

PARTS AND MATERIALS Power transformer, 120VAC step-down to 12VAC,…

Switch Contact Design

Textbook

A switch can be constructed with any mechanism bringing two conductors…

Relay Construction

Textbook

Electricity and Magnetism An electric current through a conductor will…

Permissive and Interlock Circuits

Textbook

A practical application of switch and relay logic is in control…

Sensing AC Magnetic Fields

Textbook

PARTS AND MATERIALS Audio detector with headphones Electromagnet coil…

Electromechanical Relay Logic

Worksheets - Motors

In ladder logic symbolism, an electromechanical relay coil is shown as…

The Junction Field-effect Transistor (JFET) as a Switch

Textbook

Like its bipolar cousin, the field-effect transistor may be used as an…

Motor Control Circuits

Textbook

The interlock contacts installed in the previous section’s motor…

The S-R Latch

Textbook

A bistable multivibrator has two stable states, as indicated by the…

Voltmeter Impact on Measured Circuit

Textbook

Every meter impacts the circuit it is measuring to some extent, just…

AC Motor Theory

Worksheets - Motors

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

Heat Sink Calculator

Tools

This calculator helps determine the maximum temperature a device can withstand

Wound Rotor Induction Motors

Textbook

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

Thyristor Application Circuits

Worksheets - Motors

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

Switches, Hand Actuated

Textbook

A switch is an electrical component that can “make” or…

Stepper Motors

Textbook

Stepper Motor vs Servo Motor A stepper motor is a…

Digital Logic Functions

Textbook

We can construct a simple logic functions for our hypothetical lamp…

The J-K Flip-Flop

Textbook

Another variation on a theme of bistable multivibrators is the J-K…

Full-wave Center-tap Rectifier

Textbook

PARTS AND MATERIALS Low-voltage AC power supply (6-volt output) Two…

Digital Logic Functions

Textbook

We can construct a simple logic functions for our hypothetical lamp…

The DIAC

Textbook

Like all diodes, Shockley diodes are unidirectional devices; that is,…

Field-effect-controlled Thyristors

Textbook

Two relatively recent technologies designed to reduce the…

Signal Coupling

Textbook

PARTS AND MATERIALS 6 volt battery One capacitor, 0.22 µF…

Contributors (2)

Textbook

Contributors to this chapter are listed in chronological order of…

Bridged-Tee Attenuator Calculator

Tools

This calculator helps you determine the values of the resistors R1 and R2 to be used for a bridged-tee attenuator.

Special Transformers and Applications

Textbook

Impedance Matching Because transformers can step voltage and current…

Basic Voltmeter Use

Worksheets - Motors

What will this voltmeter register when connected to a battery as shown…

Negative Feedback

Textbook

If we connect the output of an op-amp to its inverting input and apply…

Simple Circuits

Worksheets - Motors

Shown here is the schematic symbol for a resistor: What is the purpose…

Data Flow

Textbook

Buses and networks are designed to allow communication to occur…

Design Project: Event Counter

Worksheets - Motors

If your event sensing switch is mechanical in nature, you will likely…

Introduction to AC Motors

Textbook

After the introduction of the DC electrical distribution system by…

Node Voltage Method

Textbook

The node voltage method of analysis solves for unknown voltages at…

Millman’s Theorem

Textbook

In Millman’s Theorem, the circuit is re-drawn as a parallel…

pH Measurement

Textbook

A very important measurement in many liquid chemical processes…

Introduction to Digital Integrated Circuits

Textbook

Digital circuits are circuits dealing with signals restricted to the…

Induction Motor

Textbook

PARTS AND MATERIALS AC power source: 120VAC Capacitor, 3.3 µF…

TTL NOR and OR gates

Textbook

TTL Circuit Analysis Let’s examine the following TTL circuit and…

Radar Maximum Range Calculator

Tools

This tool is designed to calculate the maximum distance (range) that a radar can detect