All About Circuits

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Display Tubes

Display Tubes

In addition to performing tasks of amplification and switching, tubes…


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Digital Display Circuits

Digital Display Circuits

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


Worksheets - Displays

Digital Lab - 7-segment LED Display

Digital Lab - 7-segment LED Display

In this hands-on electronics experiment, you will control a 7-segment binary-coded decimal (BCD) display and learn about active-low and active-high logic inputs.


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Programmable Logic Controllers (PLC)

Programmable Logic Controllers (PLC)

Before the advent of solid-state logic circuits, logical control…


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Si Lab - Light Sensor (LED Photodetector)

Si Lab - Light Sensor (LED Photodetector)

In this hands-on semiconductor electronics experiment, use an LED as a light-sensitive photodetector and learn how to use a bipolar transistor in a common-emitter amplifier configuration.


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555 Lab - Blue LED Flasher With Voltage Doubler

555 Lab - Blue LED Flasher With Voltage Doubler

In this hands-on electronics experiment, build a blue LED flasher using a 555 timer and learn the basic theory of a voltage doubler using a transistor switch and a capacitor.


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Special-purpose Diodes

Special-purpose Diodes

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


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Optoelectronic Devices

Optoelectronic Devices

In this circuit, the electric motor is supposed to turn on whenever…


Worksheets - Displays

Digital Lab - 7-segment LED Display

Digital Lab - 7-segment LED Display

In this hands-on electronics experiment, you will control a 7-segment binary-coded decimal (BCD) display and learn about active-low and active-high logic inputs.


Textbook

Digital Lab - 10-bit Flashing LED Sequencer

Digital Lab - 10-bit Flashing LED Sequencer

In this hands-on electronics experiment, build and test an automated circuit that sequentially flashes 10 LED, and learn about counters, frequency dividers, and switch debouncing.


Textbook

Programmable Logic Controllers (PLC)

Programmable Logic Controllers (PLC)

Before the advent of solid-state logic circuits, logical control…


Textbook

555 Lab - LED Flasher with Inductive Flyback

555 Lab - LED Flasher with Inductive Flyback

In this hands-on electronics experiment, build a multiple LED flasher and learn how to use inductive flyback to generate a voltage pulse that is greater than the supply voltage.


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Digital Lab - Digital Combination Lock

Digital Lab - Digital Combination Lock

In this hands-on electronics experiment, build a digital combination lock with LED output indicators and learn about XOR gate functionality and how to implement NOR logic functionality using diodes.


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Series LED Resistor Calculator

Series LED Resistor Calculator

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.


Tools

555 Lab - Advanced Red LED Flasher

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.


Textbook

Si Lab - Bipolar Transistor as a Switch

Si Lab - Bipolar Transistor as a Switch

In this hands-on semiconductor electronics experiment, use a bipolar junction transistor (BJT) to switch an LED and learn about the current their amplification.


Textbook

Karnaugh Mapping

Karnaugh Mapping

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


Worksheets - Displays

Display Tubes

Display Tubes

In addition to performing tasks of amplification and switching, tubes…


Textbook

Digital Display Circuits

Digital Display Circuits

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


Worksheets - Displays

Convert MCD to Lumens

Convert MCD to Lumens

This calculator is useful for calculating the luminous flux for LEDs where the angle is known.


Tools

Design Project: LED Stroboscope

Design Project: LED Stroboscope

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


Worksheets - Displays

Synchronous Motors

Synchronous Motors

Single Phase Synchronous Motors Single-phase synchronous motors are…


Textbook

555 Lab - Red LED Flasher

555 Lab - Red LED Flasher

In this hands-on electronics experiment, you will build a red LED flasher and learn a useful application of the versatile 555 timer IC.


Textbook

Programmable Logic Controllers

Programmable Logic Controllers

The Programmable Logic Controller, or PLC, was invented in the late…


Worksheets - Displays

Time Constant Circuits

Time Constant Circuits

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


Worksheets - Displays

Series-Parallel Combination AC Circuits

Series-Parallel Combination AC Circuits

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


Worksheets - Displays

TTL NOR and OR gates

TTL NOR and OR gates

TTL Circuit Analysis Let’s examine the following TTL circuit and…


Textbook

Low-pass Filters

Low-pass Filters

By definition, a low-pass filter is a circuit offering easy passage to…


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Safe Meter Usage

Safe Meter Usage

Using an electrical meter safely and efficiently is perhaps the most…


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Successive Approximation ADC

Successive Approximation ADC

One method of addressing the digital ramp ADC’s shortcomings is…


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Pulse Width Modulation

Pulse Width Modulation

Pulse Width Modulation (PWM) uses digital signals to control power…


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Impedance Matching With Transformers

Impedance Matching With Transformers

Suppose you were to take a 3 kW electric heater rated for 240 VAC and…


Worksheets - Displays

Simple Series Resonance

Simple Series Resonance

A similar effect happens in series inductive/capacitive circuits. When…


Textbook

Si Lab - Bipolar Transistor as a Switch

Si Lab - Bipolar Transistor as a Switch

In this hands-on semiconductor electronics experiment, use a bipolar junction transistor (BJT) to switch an LED and learn about the current their amplification.


Textbook

Binary Count Sequence

Binary Count Sequence

If we examine a four-bit binary count sequence from 0000 to 1111, a…


Textbook

Ideal Diode Current and Voltage Calculator

Ideal Diode Current and Voltage Calculator

This calculator solves for any single missing value in the ideal diode I-V equation for a forward-biased PN-junction diode. Parameters are current, saturation current, voltage, temperature, and ideality factor.


Tools

Capacitor Impedance Calculator

Capacitor Impedance Calculator

This tool calculates a capacitor's reactance for a given capacitance value and signal frequency.


Tools

Ohm’s Law - How Voltage, Current, and Resistance Relate

Ohm’s Law - How Voltage, Current, and Resistance Relate

The first, and perhaps most important, relationship between current,…


Textbook

Wound Rotor Induction Motors

Wound Rotor Induction Motors

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


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Frequency and Phase Measurement

Frequency and Phase Measurement

An important electrical quantity with no equivalent in DC circuits is…


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Overcurrent Protection

Overcurrent Protection

What hazards might be posed by a circuit with excessive current going…


Worksheets - Displays

Wattmeter Design

Wattmeter Design

Power in an electric circuit is the product (multiplication) of…


Textbook

AC Capacitor Circuits

AC Capacitor Circuits

Capacitors Vs. Resistors Capacitors do not behave the same as…


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