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Thyristors

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

CMOS 555 Long Duration Blue LED Flasher

Textbook

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

AC phase

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If we were to express the series-connected DC voltages as phasors…

Static Electricity

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What does it mean for an object to have an electric charge? Give an…

Pulsed-light Sensor

Textbook

PARTS AND MATERIALS Two 6-volt batteries One NPN…

Series-Parallel DC Circuits

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

Special-purpose Diodes

Textbook

Schottky diodes Schottky diodes are constructed of a metal-to-N…

Digital Display Circuits

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What is the purpose of a seven-segment decoder circuit? What is a…

Current Divider Circuits

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

Thyristor Application Circuits

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

Simple Circuits

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

Light-Pulse Switch

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It is fairly important to use large value resistors (10 MΩ works…

Switches

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What is the purpose of the switch shown in this schematic diagram?

CMOS 555 Long Duration Red LED Flasher

Textbook

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

LED Resistor Calculator

Tools

An LED resistance calculator is perfect for when you have a single LED and need to know which resistor you should use.

CMOS 555 Long Duration Flyback LED Flasher

Textbook

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

AC Motor Theory

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

Circuits and the Speed of Light

Textbook

Suppose we had a simple one-battery, one-lamp circuit controlled by a…

Design Project: LED Stroboscope

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A technician uses a stroboscope to “freeze” the rotation of a…

LED Sequencer

Textbook

PARTS AND MATERIALS 4017 decade counter/divider (Radio Shack catalog…

SPICE Models

Textbook

The SPICE circuit simulation program provides for modeling diodes in…

Edge Coupled Trace Inductance Calculator

Tools

This calculator helps you compute for the inductance of an edge coupled trace.

Basic Electromagnetism and Electromagnetic Induction

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When lightning strikes, nearby magnetic compass needles may be seen to…

Contactors

Textbook

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

Design Project: Arbitrary Waveform Generator

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What, exactly, is an arbitrary waveform generator, and for what…

Friis Transmission Calculator

Tools

This calculator computes the power received by an antenna using Friis formula

Build a Transformer

Textbook

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

Decoder

Textbook

A decoder is a circuit that changes a code into a set of signals. It…

Pi-Match Impedance Matching Calculator

Tools

This calculator is designed to compute the parameters required to design a Pi-Match Impedance Circuit

Electron Activity in Chemical Reactions

Textbook

So far in our discussions on electricity and electric circuits, we…

Algebraic Equation Manipulation for Electric Circuits

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The electrical resistance of a conductor at any temperature may be…

An Electric Pendulum

Textbook

Capacitors store energy in the form of an electric field, and…

PWM Power Controller

Textbook

PARTS AND MATERIALS Four 6 volt batteries One capacitor, 100 µF…

Solving for Unknown Time

Textbook

Sometimes it is necessary to determine the length of time that a…

Microstrip Max Current Calculator

Tools

A calculator for solving the maximum current a microstrip can handle.

Voltage Divider Circuits

Textbook

Let’s analyze a simple series circuit and determine the voltage…

Capacitors and Calculus

Textbook

Capacitors do not have a stable “resistance” as conductors…

Basic Electricity Worksheet

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What is the purpose of the switch shown in this schematic diagram?

Power Added Efficiency Calculator

Tools

A calculator designed to compute the power-added efficiency (PAE) of an amplifier

DC Bridge Circuits

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

Electrical Conduction in Semiconductors

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In any electrically conductive substance, what are charge carriers?…

Introduction to Mixed-Frequency AC Signals

Textbook

In our study of AC circuits thus far, we’ve explored circuits…

Coefficients of Specific Resistance

Textbook

Specific resistance at 20o C:  Material Element/Alloy ohm-cmil/ft…

Timer Circuits

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

Permeability and Saturation

Textbook

The nonlinearity of material permeability may be graphed for better…

Introduction to Digital-Analog Conversion

Textbook

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

Positive Feedback OpAmp Circuits

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

What is a Filter?

Textbook

It is sometimes desirable to have circuits capable of selectively…

Introduction to DC Circuits

Textbook

“DC” stands for Direct Current, which can refer to either…

Inductor Quirks

Textbook

In an ideal case, an inductor acts as a purely reactive device. That…

Power Density Calculator

Tools

A tool designed to calculate the power density of an antenna

Other Diode Technologies

Textbook

Varicap or varactor diodes A variable capacitance diode is known as a…

Wiring Color Codes

Textbook

Wiring for AC and DC power distribution branch circuits are color…

Time Constant Circuits

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Generally speaking, how many “time constants” worth of time does…

Shock Current Path

Textbook

As we’ve already learned, electricity requires a complete path…

Microphones

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Explain how a moving-coil, or dynamic microphone works. Identify how…

Design Project: DC Voltage Regulator

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It may seem difficult to even start on a project such as this, with no…

Edge Coupled Microstrip Impedance Calculator

Tools

This tool helps calculate the impedance of an edge coupled microstrip.

Battery Construction

Textbook

The word battery simply means a group of similar components. In…

What is Network Analysis?

Textbook

Generally speaking, network analysis is any structured technique used…