Categories

Protective Relay Circuits

Worksheets - Relays

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

Digital Logic Functions

Textbook

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

Switch Types

Textbook

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

CMOS 555 Long Duration Flyback LED Flasher

Textbook

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

The S-R Latch

Textbook

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

CMOS Logic Gates

Worksheets - Relays

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

Time Constant Calculations

Worksheets - Relays

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

“Ladder” Diagrams

Textbook

Ladder diagrams are specialized schematics commonly used to document…

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 - Relays

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

Contactors

Textbook

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

Electromagnetism

Textbook

The discovery of the relationship between magnetism and electricity…

What is Alternating Current (AC)?

Textbook

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

Miscellaneous Diode Applications

Worksheets - Relays

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

Inductive Reactance

Worksheets - Relays

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

Thyristor Application Circuits

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…

Basic Electromagnetic Relays

Worksheets - Relays

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

Fail-safe Design

Textbook

Logic circuits, whether comprised of electromechanical relays or…

Electromechanical Relay Logic

Worksheets - Relays

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

Synchronous Motors

Textbook

Single Phase Synchronous Motors Single-phase synchronous motors are…

Relay Construction

Textbook

Electricity and Magnetism An electric current through a conductor will…

Protective Relays

Textbook

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

Protective Relay Circuits

Worksheets - Relays

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

Impedance Matching With Transformers

Worksheets - Relays

Suppose you were to take a 3 kW electric heater rated for 240 VAC and…

Switch Contact Design

Textbook

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

Voltage Regulation

Textbook

As we saw in a few SPICE analyses earlier in this chapter, the output…

Introduction to Diodes And Rectifiers

Textbook

All About Diodes A diode is an electrical device allowing current to…

AC Motor Control Circuits

Worksheets - Relays

Perhaps the most challenging aspect of interpreting ladder diagrams,…

Step-up and Step-down Transformers

Textbook

So far, we’ve observed simulations of transformers where the…

Time Constant Calculations

Worksheets - Relays

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

The Bipolar Junction Transistor (BJT) as a Switch

Textbook

Bipolar junction transistors (Also known as BJTs) can be used as an…

Series and Parallel AC Circuits

Worksheets - Relays

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

Build a Transformer

Textbook

PARTS AND MATERIALS Steel flat bar, 4 pieces Miscellaneous bolts,…

Arc Flash and Arc Blast

Worksheets - Relays

Electromechanical relays used to start and stop high-power electric…

Three-phase Transformer Circuits

Textbook

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

Sensing AC Magnetic Fields

Textbook

PARTS AND MATERIALS Audio detector with headphones Electromagnet coil…

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

Textbook

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

Vacuum Tube Audio Amplifier

Textbook

PARTS AND MATERIALS One 12AX7 dual triode vacuum tube Two power…

Transistor as a Switch

Textbook

PARTS AND MATERIALS Two 6-volt batteries One NPN…

Ammeter Design

Worksheets - Relays

What would happen to this meter movement, if connected directly to a…

Audio Oscillator

Textbook

PARTS AND MATERIALS Two 6-volt batteries Three NPN…

Oscillator Circuits

Textbook

Phase shift oscillator. R1C1, R2C2, and R3C3 each provide 60° of…

How to Use an Ammeter to Measure Current

Textbook

Parts and Materials   6-volt battery   6-volt incandescent…

TTL NOR and OR gates

Textbook

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

Electrical Connections

Worksheets - Relays

What, exactly, is necessary to establish electrical continuity between…

Standing Waves and Resonance

Textbook

Whenever there is a mismatch of impedance between transmission line…

Attenuators

Textbook

What is Attenuators? Attenuators are passive devices. It is…

Permissive and Interlock Circuits

Textbook

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

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

Worksheets - Relays

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

Definite Integrals and the Fundamental Theorem of Calculus

Textbook

        RELATED WORKSHEET: Calculus for Electric…

Special-output Gates

Textbook

Complementary Output Gates It is sometimes desirable to have a logic…

Basic Algebra and Graphing for Electric Circuits

Worksheets - Relays

Many different equations used in the analysis of electric circuits may…

Ohm’s Law (again!)

Textbook

A common phrase heard in reference to electrical safety goes something…

Thermoelectricity

Textbook

PARTS AND MATERIALS Length of bare (uninsulated) copper wire Length of…

JFET Amplifiers

Worksheets - Relays

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

Capacitance Calculator

Tools

This calculates the capacitance of a capacitor based on its charge, Q, and its voltage, V, according to the formula, C=Q/V.

Resistance Calculator

Tools

This calculator calculates the resistivity of a component based on its resistance value, length, and cross-sectional area.

Introduction to Digital-Analog Conversion

Textbook

Connecting digital circuitry to sensor devices is simple if the sensor…

Series R, L, and C

Textbook

Let’s take the following example circuit and analyze it:  …