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Design Project: Telegraph System

Worksheets - Telecom

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

Antenna Downtilt and Coverage Calculator

Tools

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

EIRP Calculator

Tools

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

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.

Snell’s Law Calculator

Tools

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.

Link Budget Calculator

Tools

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.

Friis Transmission Calculator

Tools

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

Radar Maximum Range Calculator

Tools

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

Digital Communication

Worksheets - Telecom

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

A 50-Ohm Cable?

Textbook

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

Q Factor and Bandwidth of a Resonant Circuit

Textbook

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

Passive Filter Circuits

Worksheets - Telecom

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

Balanced Attenuator Calculator

Tools

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

555 Ramp Generator

Textbook

PARTS AND MATERIALS Two 6 volt batteries One capacitor, 470 µF…

Negative Feedback OpAmp Circuits

Worksheets - Telecom

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

Junction field-effect transistors (JFET)

Worksheets - Telecom

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

Strain Gauges

Textbook

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

The Shockley Diode

Textbook

Our exploration of thyristors begins with a device called the…

Characteristic Impedance

Textbook

The Parallel Wires of Infinite Length Suppose, though, that we had a…

AC phase

Worksheets - Telecom

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

Properties of Exponents

Textbook

Product of Powers Property am an = am+n   Power of a Product…

Noninverting Amplifier

Textbook

PARTS AND MATERIALS Operational amplifier, model 1458 or 353…

Bit Grouping

Textbook

The singular reason for learning and using the binary numeration…

Introduction to Mixed-Frequency AC Signals

Textbook

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

555 Monostable Multivibrator

Textbook

PARTS AND MATERIALS One 9V Battery Battery Clip (Radio Shack catalog #…

The Unijunction Transistor (UJT)

Textbook

Unijunction transistor: Although a unijunction transistor is not a…

N-Way Power Divider Calculator

Tools

This calculator determines the total path loss provided by an RF n-way power splitter.

Digital Signals and Gates

Textbook

While the binary numeration system is an interesting mathematical…

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

Textbook

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

Sensitive Audio Detector

Textbook

PARTS AND MATERIALS High-quality “closed-cup” audio…

Magnetic Units of Measurement

Worksheets - Telecom

In electric circuits, the three basic quantities are voltage (E or V),…

Differential Transistor Amplifiers

Worksheets - Telecom

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

Free Space Path Loss Calculator

Tools

This calculator calculates the free space loss, given the distance, frequency, and gain, between two antennas.

Component Failure Analysis

Textbook

The job of a technician frequently entails…

DC Transducers

Worksheets - Telecom

Research and describe what the Hall effect is, and list some practical…

Correct use of Ohm’s Law

Textbook

Reminders When Using Ohm’s Law One of the most common mistakes…

Mixed-Frequency Signals

Worksheets - Telecom

What is a harmonic frequency? If an oscillator circuit outputs a…

The Common-gate Amplifier (IGFET)

Textbook

Voltage Divider

Textbook

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

Series LED Resistor Calculator

Tools

This series LED resistance calculator is perfect for when you have a single LED or a number of the same color of LEDs in series and need to know which resistor you should use.

PN Junctions

Worksheets - Telecom

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

Full-wave Center-tap Rectifier

Textbook

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

Computer Simulation of Electric Circuits

Textbook

Computers can be powerful tools if used properly, especially in the…

Karnaugh Mapping

Worksheets - Telecom

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

Electromechanical Relay Logic

Worksheets - Telecom

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

Winding Configurations

Textbook

Transformers with Multiple Secondaries Transformers are very versatile…

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

Worksheets - Telecom

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

Nonlinear Conduction

Textbook

“Advances are made by answering questions. Discoveries are made…

Susceptance and Admittance

Textbook

What is Conductance? In the study of DC circuits, the student of…

Special-purpose Batteries

Textbook

Mercury Standard Cell Back in the early days of electrical measurement…

Electrons and “holes’’

Textbook

Pure semiconductors are relatively good insulators as compared with…

The Common-collector Amplifier

Textbook

Our next transistor configuration to study is a bit simpler for gain…

Properties of Exponents

Textbook

Product of Powers Property am an = am+n   Power of a Product…