Electronics Projects

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Electronics Projects: Charging and Discharging a Capacitor

One of the most common uses for capacitors in an electronic circuit is to store a charge that you can discharge when it's needed. Project 3-1 presents a simple construction project on a solderless breadboard [more…]

Electronics Projects: Block DC while Passing AC

One of the important features of capacitors in electronics circuits is their ability to block direct current while allowing alternating current to pass. [more…]

Electronics Projects: How to Use a Diode to Block Reverse Polarity

Although diodes look a little like resistors, they behave very differently in electronic circuits. Diodes have one ability that sets them apart: They let current flow freely in one direction, but block [more…]

How Rectifier Circuits Work in Electronics

One of the most common uses for rectifier diodes in electronics is to convert household alternating current into direct current that can be used as an alternative to batteries. The rectifier circuit, which [more…]

Electronics Projects: How to Build an LED Flasher Using an Oscillator

An electronic circuit that generates repeated waveforms is an oscillator. The exact waveform generated depends on the type of circuit used to create the oscillator. Some circuits generate sine waves, some [more…]

Electronics Projects: How to Build an LED Driver Circuit

In this project, you build an electronic circuit that uses a transistor to switch on an LED using a current that's much smaller than the LED current. When you close the switch, both LEDs light up. However [more…]

Electronics Projects: How to Build a NOT Gate Circuit

A gate is a basic component of digital electronics. Gate circuits are built from transistor switches that are either ON or OFF. There are a total of 16 different kinds of gates. [more…]

Electronics Projects: How to Make a One-Shot Timer

In this project, you build an electronic circuit that uses a 555 timer chip in monostable mode. When a trigger switch is pressed, an LED lights and stays lit for approximately five seconds. Then, the LED [more…]

Electronics Projects: How to Make an LED Flasher Using a Timer Chip

In this project, you build an electronic circuit that uses a 555 timer chip to alternately flash two LEDs on and off. Then, you modify the circuit so that the circuit is controlled by two pushbuttons that [more…]

Electronics Projects: How to Make a Beeper

In this electronics project, you use two 555 timer chips to build an audible beeper, with both timers configured in astable mode. Each time controls a different audible tone on the beeper. [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…]

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 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…]

Electronics Projects: How to Flash Multiple LEDs with a BASIC Stamp

This electronics project begins by connecting 6 LEDs to the breadboard in a BASIC Stamp HomeWork board and then continues by showing the programming necessary to flash all of the LEDs on and off. You can [more…]

Electronics Projects: A Simple Crystal Radio Circuit

A basic crystal radio receiver circuit consists of just a few basic electronic components: an antenna and a ground connection, a coil, a variable capacitor, a diode, and an earphone. [more…]

Electronics Projects: Materials for a Crystal Radio Circuit

A crystal radio is a good project to hone your electronics skills. You’ll need a handful of parts to build your crystal radio. The following is a recommended list: [more…]

Electronics Projects: How to Build the Coil for a Crystal Radio

When you look at a crystal radio, one of the simplest of all useful electronic circuits, the first thing you’re likely to notice is the large coil. The coil usually consists of 100 turns or more of small-gauge [more…]

Electronics Projects: How to Assemble the Crystal Radio Circuit

Before you embark on assembling the various electronic parts of a crystal radio, you will need a base and a few other parts. Here’s a list of the parts you’ll need to assemble the circuit: [more…]

Electronics Projects: How to Add an Antenna to a Crystal Radio Circuit

A good, long antenna is an electronic component vital to the successful operation of a crystal radio. In general, the longer the antenna, the better. If possible, try make your antenna at least 50′. Longer [more…]

Electronics Projects: How to Ground Your Radio Antenna

A good ground connection is every bit as important as a good antenna in do-it-yourself radio electronics. The best way to create a good ground connection is to use a metal cold water pipe. [more…]

Electronics Projects: How to Use a Servo in a Circuit

A servo is a special type of motor for use in electronics that is designed to rotate to a particular position and hold that position until told to rotate to a different position. Hobby servos are frequently [more…]

Electronics Projects: How to Create Names in PBASIC Code

When your electronics projects take you into the realm of programmable circuits, you may find yourself writing some PBASIC code. In PBASIC, you can create names to use as program labels. You can also create [more…]

Electronics Projects: How to Create Constants in PBASIC Code

If you begin to use programmable circuits in your electronics projects, you’ll end up writing some code. If your programmable circuit is a BASIC Stamp, you’ll write that code in PBASIC. [more…]

Electronics Projects: How to Assign Names to I/O Pins in PBASIC Code

Programmable circuits in electronics projects require a bit of programming. If your programmable circuit is a BASIC Stamp, you’ll write that code in PBASIC. PBASIC lets you assign a name to an I/O pin. [more…]

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