Polarity Search Results

How To: Learn about capacitors, diodes, voltage states, and potentiometers

Even basic electronics are pretty damn complicated. This video is near the end of Scotty's amazing series of electronics tutorials, and will teach you about adding a diode and a capacitor to a circuit, choosing a power supply, voltage states, and polarity.

How To: Make a Rubik's Cube out of dice, magnets, and epoxy

Check out this video from Make Magazine! Watch Action Girl and Bre Pettis show you how to make a Rubik's Cube out of dice, magnets and epoxy. Interestingly enough, the first Rubik's Cube ever was made with magnets! We found inspiration in Gfixler'and Burzvingion's instructions.

How To: Make a homopolar motor

Turn yourself into an electromagnetism maestro with one of the simplest motors known to man—the homopolar motor. It's the "simplest motor" because of its absent polarity change. The magnetic field does not change the direction or strength. It consists of only three parts; copper wire, round magnet and battery. It produces really low voltages, which means there's no real practical application for this motor, but it sure is fun to make! Try your hands at the homopolar motor—watch the video and ...

How To: Build a universal motion alarm to protect your home

This video shows us the method to make a universal motion alarm to protect your home. You will need a reed switch with an alternating contact, a 9V battery with a battery clip, a switch, a buzzer, a small plastic box and a magnet. When a magnet is brought near the reed switch, it switches to the other contact and the switch is open. If the magnet is removed, the switch is closed and the buzzer starts ringing. Make the circuit with correct polarity for battery and the buzzer. Make a hole in th...

How To: Make a rechargeable, solar-powered USB battery

An emergency battery charger for your mobile phone comes in handy, but it's not the ultimate solution; once it's dead it's useless (what a waste). If you want to really get off the metaphorical grid, you can follow the steps in this video to construct a more robust circuit that will not only bail you out of an inconvenient situation but also recharge in between uses. The simple addition of a low voltage solar panel and rechargeable batteries makes this possible. Enjoy!

How To: Prove that water molecules are polar with a home-science experiment

This free video science lesson from Jefferson Lab demonstrates a simple technique for demonstrating the polarity of the water molecules. For all of the relevant details and detailed, step-by-step instructions, as well as to get started trying this experiment yourself, watch this home-science how-to.

How To: Make blobs in a bottle with a Lava Lamp effect

The World's Easiest Lava Lamp! This is an easy, fun science activity that is great for any age. In fact, our video crew ended up taking the extra bottles home to show their friends. It is also a great demonstration of liquid density, the release of gases in a chemical reaction, acids and bases, intermolecular polarity, and well, just plain science coolness.

How To: Make LEDs Dance to Techno Music

You must have seen some expensive mp3 players and CD players which have LEDs fixed on them and they dance to the tune looking really pretty.

Robot Basics: Using an H Bridge to Move Your Bot Backwards

I love robots. They have the potential to evolve into Asimovian destroyers of the human species, but have only just mastered the art of cleaning my rug. They have an ever increasing cool factor and a growing number of cheap and simple components that let the hobby roboticist reach for the burning miasmas of plasma. But to get to the stars, we need to start with the basics.

How To: Build a Laser Trip Wire Alarm System

Building a DIY Alarm System: The Concept So, you want to protect your property, or maybe a room, car, or even your backyard. The concept of an alarm system is to notify the "alarm administrator" that there is an intruder entering the previously designated boundaries. The triggers for this boundary could be as simple as a pressure sensor, or as complicated as a laser network. They all do the same thing, but some work better than others.

Market Reality: Snoop & Mark Ronson Hit AR, DreamWorld & Mad Gaze Launch Wearables, & Google Tests Mobile Hand Tracking

Before smartglasses makers can dream of taking smartglasses to mainstream consumers, they must first determine the right mix of form, function, and price that will drive customers to buy into what they're hoping to sell.

How To: The Hardware Hacker's Introduction to Microcontrollers, Part One: Anatomy of an Arduino

In this article, I'll be explaining the basics of how microcontrollers work, physically and virtually. First off, microcontrollers are no simple thing, so don't be discouraged if you find it mind-boggling! The world of microcontrollers is fascinating, engaging, and an awesome hobby; it never gets boring. I'll be focusing more on I/O and analog based microcontrollers, such as those running Arduino, and using Atmel chips as examples (these are most commonly available, and easy to program).

How To: Make Your Own "TV-B-Gone" to Silence All Televisions That Oppose You

Whether you're in an airport, restaurant or waiting room, the insidious grip of televisions on human life is omnipresent. Sometimes it's nice to talk to other human beings while looking at them directly—actually hearing what they have to say.

How To: Charge a Cell Phone on Train Tracks

If you're ever lost or hurt out in the middle of nowhere with a dead cell phone, you might be able to "flag" down help as long as you're near some railroad tracks.

How To: Harness Bluetooth Communication Using Arduino

Since its creation, Arduino has been growing exponentially more popular as DIY enthusiasts and Makers alike realize its potential. As new versions of the device are released, many easy-to-use peripherals are showing up on the market also.

How To: 8 Ways to Cool Down & Prevent Your Samsung Galaxy S5 from Overheating

It's one hell of a device, but the Samsung Galaxy S5 is still susceptible to the many hazards that other smartphones are prone to: theft, cracked screens, poor battery life, and particularly, overheating.

How To: Make a Paper Plate Speaker That Actually Works for Under \$1

Back in 2007, YouTube user HouseholdHacker posted a parody video on how to make a high-def speaker for under a buck. MythBusters took on the challenge and busted it.

How To: Build a Bomb-Defusing Robot Tank for the Revolution

War leaves a lot of stuff behind. Torn families, delegitimized institutions, mass graves, and unexploded ordinances litter the post occupation landscape. Whether or not you have driven the imperialist out, or are still in the phase of armed resistance, you will need the ability to safely diffuse bombs. My bomb defusing Silvia-bot can do it all. She can catch grasshoppers, cut wires, collect samples, tase enemies and even play chess! Materials

How To: Hack Christmas Lights for Custom Holiday Lighting Patterns

General Electric isn't known for their Christmas lights, but maybe they should be, because their GE Color Effects are pretty awesome. Especially the LED Color Effects G-35 String sets. And especially when someone named Darco hacks them.

How To: DC Versus AC and the Diode

Direct current (DC) by definition flows in one direction. Alternating current (AC), on the other hand, periodically changes direction, or reverses polarity. It is indeed possible for a portion of a circuit that is normally DC to periodically change direction, or reverse polarity like an AC circuit.

Outland: A Polarizing Experience

Sticking with our theme of XBLA games with uninspiring names, we have Outland. This game shares its name with an unrelated sci-fi cult film from 1981, unrelated comic strip from the '90s, and unrelated region in World of Warcraft. Didn't exactly try hard to build name recognition. Other than that, Finnish developer Housemarque has created the best 2D platformer I've seen in years.

How To: Generate Electricity From Kinetic Energy

Piezoelectric Energy In this article, I'll show you how to make a small, wallet-sized device that generates electricity from kinetic energy. The concept is simple: Piezoelectricity is the charge that is produced when certain solid materials (commonly ceramic and crystal) in response to mechanical stress. Piezoelectrics have many applications; in speakers, actuators, sensors, even fuses. For more information, click here.

Making Electromagnetic Weapons: EMP Generator, Part One

In this series, I'll be exploring electromagnetic weapons, how to build them, their function and application to the future, and the amazing possibilities electromagnetism has to offer. First, the electromagnetic pulse generator, or EMP. You've probably heard of these before, and their devastating effects on electronics. A simple EMP consists of a capacitor, transformer, trigger, and coil of copper wire. This, when triggered, would produce an intense magnetic field for a brief period, similar ...

Post-Modern Vandalism: How to Hack Together These Everlasting Light Graffiti Throwies

Graffiti is a great way of getting your message out to the masses. The earliest known graffiti dates back to 30,000 years ago and used the traditional apply-paint-to-wall technique. Though our paint now comes in cans and not from scavenged berries, the actual graffiti process hasn't really evolved from those first cave paintings.

How To: Make A High-Lighter Stun-Gun

The Stun-Gun In this article, I'll show you how to make a small, weaponized highlighter. Before I get into how to built this device, let me warn you. This device is harmful! When used, it can cause burns and/or serious muscle spasms. The voltage is potentially deadly! DO NOT attempt to build this device unless you are experienced with safety, electronics, soldering, and understand circuit schematics.

Master the Power: How to Shock People with Your Fingertips

In this article, I'll be showing you how to make a simple yet effective static electricity generator. Basically, this device allows you to carry a constant static charge on your body and discharge it on anything grounded or of opposite polarity. The electricity generated is around 8-10 kV, at a very low current. The shock is enough to startle your friends, just like a static shock from a trampoline or carpeted room. You'll need a little experience in soldering and circuit design to build the ...

DIY Solar Power: Make Your Own Diode-Based Solar Panels and Capture the Sun's Energy!

Solar panels are an amazing invention. Catching energy from the Sun before it even enters Earth's food chain, photovoltaics are like an all-natural nuclear power plant. Unfortunately, the constituted parts of a solar panel are rare, valuable, and subject to the coercive forces of market competition.

How To: This DIY Soft-Circuit Military Tech Lets You Power Electronics Using Your Clothes

It turns out that the popularity of soft circuit electronics has leaked out of the interwebs and into the hands of the U.S. military. Soft circuit electronics allow you to literally sew electronics circuits into fabric using flexible conductive thread instead of wire. Soft circuits can be used for all sorts of fun projects, like the TV-B-Gone Hoodie and the Heartbeat Headband.

DIY Lab Equipment: Make a Magnetically Controlled Cigar Box Stir Plate

If you've ever been inside of a real laboratory, you probably noticed how expensive the equipment is. You'd never be able to afford even just one of those ultra high-tech machines required to splice genes or split atoms. Even the lesser machines can be prohibitively costly, including a stir plate.

Making Electromagnetic Weapons: The Theory Behind EMP Generators

This is the third part of my electromagnetic pulse series (see Part One and Part Two). By now, I've covered the hardware and general concept of electromagnetic pulse generators, but how exactly do they disable electronics? How can an invisible field of energy have such a catastrophic effect on computers, cell phones, and most any other electronics? I'll be answering all these questions in part three of Making Electromagnetic Weapons.

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