Categories

Mesh Current Method and Analysis

Textbook

The Mesh-Current Method, also known as the Loop Current Method, is…

Introduction to Network Theorems

Textbook

Anyone who’s studied geometry should be familiar with the…

Inverting and Noninverting OpAmp Voltage Amplifier Circuits

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Network Protocols

Textbook

Aside from the issues of the physical network (signal types and…

Bipolar Junction Transistors in Active Mode

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Timer Circuits

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Basic Troubleshooting Strategies

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A chandelier has five light bulbs in it, and one of them is not…

Memory Devices

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Series-Parallel Combination AC Circuits

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Characteristic Impedance

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

A 50-Ohm Cable?

Textbook

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

Power Conversion Circuits

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OpAmp Oscillator Circuits

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Electromechanical Relay Logic

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

Bipolar Transistor Biasing Circuits

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Series DC Circuits Practice Worksheet with Answers

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In this circuit, three resistors receive the same amount of current (4…

Component Modeling

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When plotted on a curve tracer, the characteristic curve for a normal…

DC Branch Current Analysis

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Active Filters

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Thyristor Application Circuits

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Practical Power Factor Correction

Textbook

When the need arises to correct for poor power factor in an AC power…

Protective Relays

Textbook

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

Design Project: Arbitrary Waveform Generator

Worksheets - IT / Networking

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

Make Your Own Multimeter

Textbook

PARTS AND MATERIALS Sensitive meter movement (Radio Shack catalog #…

Kelvin (4-wire) Resistance Measurement

Textbook

Suppose we wished to measure the resistance of some component located…

The Antiderivative (Indefinite Integral)

Textbook

  Notice something important here: taking the derivative of f(x)…

Voltage-to-Current Signal Conversion

Textbook

In instrumentation circuitry, DC signals are often used as analog…

The R/2R DAC (Digital-to-Analog Converter)

Textbook

The R/2R DAC circuit is an alternative to the binary-weighted-input…

Wound Rotor Induction Motors

Textbook

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

Valence and Crystal Structure

Textbook

Valence: The electrons in the outermost shell, or valence shell, are…

CMOS 555 Long Duration Blue LED Flasher

Textbook

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

Numeration Systems

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Digital computers communicate with external devices through ports:…

Combination Tubes

Textbook

Similar in thought to the idea of the integrated circuit, tube…

Noise Figure and Noise Temperature Calculator

Tools

This calculator computes the noise figure and noise temperature in a system

Complex Number Arithmetic

Textbook

Since complex numbers are legitimate mathematical entities, just like…

Networks and Busses

Textbook

The wires between the tank and the monitoring location is  called…

Circuit Simplification Examples

Textbook

Let’s begin with a semiconductor gate circuit in need of…

Active-mode Operation (BJT)

Textbook

When a transistor is in the fully-off state (like an open switch), it…

Motor Control Circuits

Textbook

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

RF Power Conversion Calculator

Tools

A tool designed to convert RF power from watts to decibels and vice versa

Stepper Motors

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The D Latch

Textbook

Since the enable input on a gated S-R latch provides a way to latch…

Static Electricity Sensor

Textbook

PARTS AND MATERIALS One N-channel junction field-effect transistor,…

Simple Combination Lock

Textbook

PARTS AND MATERIALS 4001 quad NOR gate (Radio Shack catalog #…

Inverting Op-Amp Resistor Calculator

Tools

This calculator determines the bias and feedback of resistors for an inverting op-amp.

Decoder

Textbook

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

Counters

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Edge Coupled Trace Inductance Calculator

Tools

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

Basic identities

Textbook

Additive Identity a + 0 = a Multiplicative Identity 1a = a…

Basic Gate Function

Textbook

Parts and Materials 4011 quad NAND gate (Radio Shack catalog #…

Insulated Gate Bipolar Transistors

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

Safety Grounding

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In simple AC power systems, one of the two conductors is typically…

Fail-safe Design

Textbook

Logic circuits, whether comprised of electromechanical relays or…

Transistors, Insulated-gate Field-effect (IGFET or MOSFET)

Textbook

We have the symbols for depletion mode and enhancement mode MOSFETs -…

Multi-Stage Transistor Amplifiers

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Passive Filter Circuits

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

Memory Devices

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Kirchhoff’s Voltage Law (KVL)

Textbook

What is Kirchhoff’s Voltage Law (KVL)? The principle known as…

Special-purpose Batteries

Textbook

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

Diode Ratings

Textbook

In addition to forward voltage drop (Vf) and peak inverse voltage…