All About Circuits

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A 50-Ohm Cable?

A 50-Ohm Cable?

Early in my explorations of electricity, I came across a length of…


Textbook

Digital Communication

Digital Communication

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


Worksheets - Modulation

Balanced Attenuator Calculator

Balanced Attenuator Calculator

This balanced attenuator calculator helps you determine the resistor (R1) values for a balanced attenuator.


Tools

A 50-Ohm Cable?

A 50-Ohm Cable?

Early in my explorations of electricity, I came across a length of…


Textbook

Radar Maximum Range Calculator

Radar Maximum Range Calculator

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


Tools

EIRP Calculator

EIRP Calculator

A helpful tool for computing the Effective Isotropic Radiated Power (EIRP) of an antenna


Tools

Q Factor and Bandwidth of a Resonant Circuit

Q Factor and Bandwidth of a Resonant Circuit

The Q, or quality, factor of a resonant circuit is a measure of the…


Textbook

Friis Transmission Calculator

Friis Transmission Calculator

This calculator allows you to solve for any of the six variables in the Friis formula for RF transmission: transmitter power, transmitter gain, receiver power, receiver gain, frequency, or distance.


Tools

Passive Filter Circuits

Passive Filter Circuits

In very simple, qualitative terms, rate the impedance of capacitors…


Worksheets - Modulation

Snell’s Law Calculator

Snell’s Law Calculator

Given three of the four input parameters (refractive indices, angles of incidence, and refraction) this tool calculates the missing variable based on Snell's law.


Tools

Link Budget Calculator

Link Budget Calculator

A Link Budget puts into account all gains and losses a signal goes through in a system as it is transmitted. The calculator calculates the power of the received signal given amplifier and antenna gains, and medium loss.


Tools

Antenna Downtilt and Coverage Calculator

Antenna Downtilt and Coverage Calculator

This calculator will determine the correct antenna downtilt angle given the heights of the antennas and distance between them.


Tools

Design Project: Telegraph System

Design Project: Telegraph System

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


Worksheets - Modulation

Bridged-Tee Attenuator Calculator

Bridged-Tee Attenuator Calculator

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


Tools

Basic Algebra and Graphing for Electric Circuits

Basic Algebra and Graphing for Electric Circuits

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


Worksheets - Modulation

Wire Types and Sizes

Wire Types and Sizes

Most electrical wire is covered in a rubber or plastic coating called…


Worksheets - Modulation

Passive Integrator and Differentiator Circuits

Passive Integrator and Differentiator Circuits

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


Worksheets - Modulation

Thyristor Application Circuits

Thyristor Application Circuits

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


Worksheets - Modulation

Larger 5 & 6-variable Karnaugh Maps

Larger 5 & 6-variable Karnaugh Maps

Larger Karnaugh maps reduce larger logic designs. How large is large…


Textbook

Wire-by-Number project kit introduction

Wire-by-Number project kit introduction

Wire-by-Number project: simple voltage divider Description: Build a…


Worksheets - Modulation

Mutual Inductance

Mutual Inductance

When an electric current is passed through a coil of wire, what…


Worksheets - Modulation

Complex Vector Addition

Complex Vector Addition

If vectors with uncommon angles are added, their magnitudes (lengths)…


Textbook

Analog-to-Digital Conversion

Analog-to-Digital Conversion

The circuit shown here is a four-bit analog-to-digital converter…


Worksheets - Modulation

Characteristic Impedance

Characteristic Impedance

Note the “50 ohm” rating printed on the jacket of the cable. What…


Worksheets - Modulation

Sequences

Sequences

Arithmetic Sequences An arithmetic sequence is a series of numbers…


Textbook

Resistors

Resistors

Because the relationship between voltage, current, and resistance in…


Textbook

Printed Circuit Board Layout and Manufacture

Printed Circuit Board Layout and Manufacture

When a PCB designer speaks of dimensions in thous or mils, what does…


Worksheets - Modulation

Parallel Circuits and the Application of Ohm’s Law

Parallel Circuits and the Application of Ohm’s Law

In this introduction to parallel resistance circuits, we will explain…


Textbook

Integrated Circuits

Integrated Circuits

  A Logic Gate is assigned as an elementary building block of…


Textbook

DC Circuit Equations and Laws

DC Circuit Equations and Laws

Power Equation of Ohm’s Law and Joule’s Law    …


Textbook

Clamper Circuits

Clamper Circuits

The circuits in the figure below are known as clampers or DC…


Textbook

Building Series-Parallel Resistor Circuits

Building Series-Parallel Resistor Circuits

Once again, when building battery/resistor circuits, the student or…


Textbook

Strain Gauges

Strain Gauges

If a strip of conductive metal is stretched, it will become skinnier…


Textbook

Three-phase Transformer Circuits

Three-phase Transformer Circuits

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


Textbook