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Line Voltage Can Supply Power to Electronic Circuits

Line voltage refers to the voltage that's available in standard residential or commercial wall outlets. many — if not most — real-world electronics projects do require that you use line voltage. [more…]

Electronics Safety Lesson: How to Stay Safe with Line Voltage

Whenever you build an electronics project that uses line voltage, you must take extra precautions to ensure your safety and the safety of anyone who may come in contact with your project. Line voltage [more…]

Alternating Current in Electronics: Hot, Neutral, and Ground Wires

Before you start working with line voltage in your electronic circuits, you need to understand a few details about how most residential and commercial buildings are wired. The following description applies [more…]

Alternating Current in Electronics: Wires and Connectors

When working with line voltage (the power that comes from a wall outlet) in your electronic circuits, you must always use wire that's designed specifically to handle line-voltage currents. Depending on [more…]

How to Use Fuses to Protect Electronic Line-Voltage Circuits

A fuse is an inexpensive device that can carry only a certain amount of current. When a fuse is in an electronic circuit and the current exceeds the rated level, the fuse melts [more…]

How to Use Relays to Control Electronic Line-Voltage Circuits

In many electronics projects, you need to turn line-voltage powered circuits on and off using circuits that use low-voltage DC power supplies. For example, suppose you want to flash a 120 VAC flood lamp [more…]

Electronic Power Supply: Build or Buy?

You can probably purchase a preassembled power adapterthat will provide the voltage you need for your electronics project for just a few dollars more than you could build the circuit yourself. A power [more…]

How Power Supplies Transform Voltage in Electronic Circuits

In most electronic power supplies, the transformer reduces the voltage. A transformer is a device that uses the principal of electromagnetic induction to transfer voltage and current from one circuit to [more…]

How Power Supplies Filter Rectified Current in Electronic Circuits

Although the output from an electronic rectifier circuit is technically direct current because all of the current flows in the same direction, it isn't stable enough for most purposes. Even full-wave and [more…]

How Power Supplies Turn AC into DC in Electronic Circuits

The task of turning alternating current into direct current is called rectification, and the electronic circuit that does the job is called a rectifier [more…]

Electronics Projects: How to Use Your Crystal Radio

Once your crystal radio circuit is built, your antenna is up, and your ground wire is connected, your electronic device is ready to go. It’s time to put your crystal radio to the test. Follow these steps [more…]

The Difference between Analog and Digital Electronics

All of electronics can be divided into two broad categories: analog and digital. One of the most common examples of the difference between analog and digital devices is a clock. On the analog clock, the [more…]

Digital Electronics: Numbering Systems

Most digital electronic circuits work with the binary number system. But what is a number system? A number system is simply a way of representing numeric values. Number systems use symbols called [more…]

Digital Electronics: Binary Basics

Digital electronic circuits rely on the binary number system. Thus, before you can understand the details of how digital circuits work, you need to understand how the binary numbering system works. [more…]

Digital Electronics: Logical Operations

One of the things that makes binary so useful in electronics is that it’s very efficient at handling special operations called logical operations. Logical operations [more…]

Digital Electronics: How to Use Windows Calculator for Binary Conversions

In the course of working digital electronics projects, it’s unlikely that you will have to convert a number between binary and decimal. If you do find that you need to convert binary numbers to decimal [more…]

Digital Electronics Projects: How to Use Switches to Build Gates

To give you an idea of how basic gates work, these electronics projects show you how to assemble an AND gate, an OR gate, and an XOR gate using simple DPDT knife switches. In actual practice, gate circuits [more…]

Electronics Components: Introducing Microcontrollers

A microcontroller is a complete computer on a single electronic chip. They can be purchased for $50 or less. Like all computer systems, microcomputers consist of several basic subsystems: [more…]

Electronics Components: Introducing the BASIC Stamp

The BASIC Stamp is an electronic microcontroller made by Parallax, a company started by two kids fresh out of high school in 1986. A BASIC Stamp is an essentially complete, self-contained computer system [more…]

Electronics Components: Buying a BASIC Stamp

A BASIC Stamp is an essentially complete, self-contained computer system for use in electronic circuits. Although you can purchase a BASIC Stamp microcontroller by itself, the easiest way to get into BASIC [more…]

Electronics Components: BASIC Stamp Prototyping Boards

There are two kinds of BASIC Stamp prototyping boards that you can consider for your electronics projects — a BASIC Stamp HomeWork board and a BASIC Stamp Board of Education. [more…]

Electronics Components: Connect I/O Pins on a HomeWork Board

Before you start writing programs to run on a BASIC Stamp to add special effects to your electronics projects, you must first build the circuit(s) that will connect to the I/O pins on the Stamp. Once the [more…]

Digital Electronics: How to Install the BASIC Stamp Editor and Connect to the Stamp

To tell the BASIC Stamp what you want it to do in your digital electronics project, you must program it. The BASIC Stamp Windows Editor is the software that you use on your computer to create programs [more…]

Electronics Projects: How to Write a PBASIC Program

You can use a BASIC Stamp microcontroller to create some special effects in your digital electronics projects. But first you have to learn how to write programs to control the controller. If you’ve never [more…]

Electronics Projects: How to Flash an LED with a BASIC Stamp

A BASIC Stamp is serious overkill for an electronic circuit that simply flashes an LED on and off: You can do that for a few bucks with a 555 timer integrated circuit [more…]

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