Differential Equations

As opposed to normal equations where the solution is a number, a…

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Resistor Color Code Calculator and Chart—4 Band, 5 Band, or 6 Band Resistors

A handy all-in-one tool for reading resistor color code values for a 4 band resistor, 5 band resistor, or 6 band resistor.

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Tools

Insulated Gate Bipolar Transistors

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

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Worksheets - Encryption

Introduction to Bipolar Junction Transistors (BJT)

The invention of the bipolar transistor in 1948 ushered in a…

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Transistors, junction field-effect (JFET)

Note that the direction of the arrow at the gate indicates the…

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Textbook

Parallel Circuits and the Application of Ohm’s Law

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

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Textbook

Transistors, Bipolar

There are not too many circuit symbols for bipolar transistors. There…

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Digital Lab - Basic 2-Input NAND Gate Circuit

In this hands-on electronics experiment, build and test a 2-input digital NAND gate with LED indicators and learn to read pinout diagrams, power a digital IC, connect unused inputs and outputs, and use pulldown resistors.

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

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

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The Common-collector Amplifier

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

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Textbook

Differentiator and Integrator Circuits

By introducing electrical reactance into the feedback loops of an…

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Textbook

DIY EE Lab - Setting Up a Home Electronics Lab

To build the DIY electronics projects described in this textbook, you will need a small work area, a few tools, and some basic electronics supplies. This page describes the setup of a low-cost home electronics laboratory.

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TTL NAND and AND gates

Suppose we altered our basic open-collector inverter circuit, adding a…

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Feedback

If some percentage of an amplifier’s output signal is connected…

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Textbook

555 Lab - Advanced Red LED Flasher

In this hands-on electronics experiment, build a red LED flasher with a transistor drive to control the current and learn how to use transistors to provide current gain and how to limit LED current.

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Design Project: Stepper Motor Driver

At first it may seem pointless to have the four buffer gates following…

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Worksheets - Encryption

The S-R Latch

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

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Textbook

DC Lab - Potentiometer as a Rheostat

In this hands-on electronics experiment, you will use a potentiometer as a variable resistor to control the speed of a motor and learn how to connect a potentiometer as a rheostat.

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Textbook

Series-Parallel DC Circuits

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

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Worksheets - Encryption

Introduction to Diodes And Rectifiers

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

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Textbook