Categories

Switch Contact Design

Textbook

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

Thyristor Application Circuits

Worksheets - Relays

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…

Programmable Logic Controllers (PLC)

Textbook

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

Protective Relay Circuits

Worksheets - Relays

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

Protective Relays

Textbook

A special type of relay is one that monitors the current, voltage,…

TTL Logic Gates

Worksheets - Relays

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

What is Alternating Current (AC)?

Textbook

Most students of electricity begin their study with what is known as…

CMOS Logic Gates

Worksheets - Relays

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

Sensing AC Magnetic Fields

Textbook

PARTS AND MATERIALS Audio detector with headphones Electromagnet coil…

DC Generator Theory

Worksheets - Relays

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…

Permissive and Interlock Circuits

Textbook

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

AC Motor Control Circuits

Worksheets - Relays

Perhaps the most challenging aspect of interpreting ladder diagrams,…

Latch Circuits

Worksheets - Relays

What do you think this logic buffer gate will do, with the output…

Switch Types

Textbook

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

Electromechanical Relay Logic

Worksheets - Relays

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

Flip-Flop Circuits

Worksheets - Relays

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

Time-Delay Electromechanical Relays

Worksheets - Relays

What does the normal status of an electrical switch refer to?…

“Ladder” Diagrams

Textbook

Ladder diagrams are specialized schematics commonly used to document…

Programmable Logic Controllers (PLC)

Textbook

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

Flip-Flop Circuits

Worksheets - Relays

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

Switch Contact Design

Textbook

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

Permissive and Interlock Circuits

Textbook

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

Series and Parallel AC Circuits

Worksheets - Relays

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

AC Commutator Motors

Textbook

Charles Proteus Steinmetz’s first job after arriving in America…

Protective Relays

Textbook

A special type of relay is one that monitors the current, voltage,…

Motor Control Circuits

Textbook

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

Miscellaneous Diode Applications

Worksheets - Relays

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

High Voltage Ohmmeters

Textbook

Most ohmmeters of the design shown in the previous section utilize a…

AC Motor Theory

Worksheets - Relays

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

Wound Rotor Induction Motors

Textbook

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

DC Motor Control Circuits

Worksheets - Relays

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

What is Alternating Current (AC)?

Textbook

Most students of electricity begin their study with what is known as…

The TRIAC

Textbook

SCRs are unidirectional (one-way) current devices, making them useful…

Protective Relay Circuits

Worksheets - Relays

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

Polyphase Motor Design

Textbook

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

Full-wave Center-tap Rectifier

Textbook

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

Insulated Gate Bipolar Transistors

Worksheets - Relays

What is an Insulated Gate Bipolar Transistor (IGBT), and what…

Time-Delay Electromechanical Relays

Worksheets - Relays

What does the normal status of an electrical switch refer to?…

Non-right Triangle Trigonometry

Textbook

The Law of Sines (for any triangle) The Law of Cosines (for any…

What Are Zener Diodes?

Textbook

What Is a Zener Diode? A Zener diode is a special type of rectifying…

Flip-Flop Circuits

Worksheets - Relays

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

Time Constant Equations

Textbook

Value of time constant in series RC and RL circuits   Time…

Common-Emitter Amplifier

Textbook

PARTS AND MATERIALS One NPN transistor—model 2N2222 or 2N3403…

Frequency and Phase Measurement

Textbook

An important electrical quantity with no equivalent in DC circuits is…

Parallel Wire Inductance Calculator

Tools

This tool is designed to calculate the inductance of two parallel wires

Parallel Batteries

Textbook

PARTS AND MATERIALS Four 6-volt batteries 12-volt light bulb, 25 or 50…

Voltage Divider Calculator

Tools

The voltage divider is a circuit used to create a voltage less than or equal to the input voltage.

AC Power

Worksheets - Relays

If a sinusoidal voltage is applied to an impedance with a phase angle…

Vol V. Credits

Textbook

All entries arranged in alphabetical order of surname. Major…

Nonlinear Resistance

Textbook

PARTS AND MATERIALS Calculator (or pencil and paper for doing…

R, L and C Summary

Textbook

With the notable exception of calculations for power (P), all AC…

CMOS 555 Long Duration Flyback LED Flasher

Textbook

PARTS AND MATERIALS Two AAA Batteries Battery Clip (Radio Shack…

Design Project: DC Motor

Worksheets - Relays

The armature windings of your DC motor will have very low resistance.…

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

Textbook

A voltage multiplier is a specialized rectifier circuit…

Automotive Alternator

Textbook

Project Parts and Materials Automotive alternator (one required, but…

Ohm’s Law Calculator

Tools

Calculate circuit parameters using Ohm's Law

Radicals

Textbook

Definition of a Radical Given the expression where “x” is…

Active Loads in Amplifier Circuits

Worksheets - Relays

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