Interested in getting 1.5-volt button cell batteries for pennies on the dollar? Kip Kay, of Make Magazine, is here to show you how. The trick is to buy Energizer A23s, each of which contains 8 1.5-volt button cells. For detailed instructions on this straightforward money-savin ...more
Learn how to charge a 12 Volt Battery using a Solar Power Battery Maintainer by watching this how-to video. This method can be used to charge 12 volt batteries of any kind - cars, trucks, boats, motorcycles, tractors, lawn equipment - any kind of 12 volt battery you can think of!
This video is revelatory. Here is the good news. If you have devices that rely on 1.5 volt button cell batteries, this tutorial from KipKay will save you $40.00. Here is the bad news. Now, I am just angry at big business. Duracell. Energizer. You really suck. Hack a 12-volt ...more
Liven up your parties by making your own fog machine, using items that you can find around the house. You Will Need * An iron * Two aluminum roasting pans, about 5 inches deep or deeper * Scissors * Aluminum foil * A hot-glue gun * 7 lbs. pebbles or gravel * A 20-oz. plastic b ...more
Materials needed: Altoid mint tin, 9 volt batter and connector, switch, 7812 voltage regulator, 12 volt computer fan, carbon filter and 2 pieces of screen. Wire the battery connectors. Solder all of the following: Negative connector to the switch, wire to the switch, ground wi ...more
If you're a geek, then this power pack will give you a total techgasm. The power pack allows you to charge pretty much anything you can fit into a 12 volt power jack in your car (where the cigar/lighter receptable goes). The power pack is a portable battery, so no need for cha ...more
So, your children have the same old boring Fisher-Price Power Wheels that all the other kids on the block have. Do you really want your child to be like all of the rest? No, I didn't think so. Turn those miniature Power Wheels, Dumar or Peg Perego vehicles into a little bit of ...more
Computer viruses are terrifying. They are undetectable, dangerous, and operate constantly right under your nose. For the average computer user, there are only a few repair options. You could buy expensive antivirus software that causes more problems than it fixes, you can wipe ...more
Microcontrollers are great. You can do anything from water your garden to catch wildlife trash diggers in the act—and on the cheap. I prefer to use the Arduino microcontroller because of the large and helpful community built around the website. Though it is my favorite, there ...more
Here's how to build a sexy looking water-fuel generator that will convert your tap water into an extremely powerful, clean burning gas! Video: . An oxyhydrogen generator, like this one, uses electricity from your car battery to split water into hydrogen and oxygen gasses. Toge ...more
Want an electric car without the price tag? You could always build your own, or maybe just hack your old gas guzzler into an eco-friendly electric machine... This weekend at Defcon, security consultant David Brown showed off his "Voltswagon" project, a 1974 Beetle named Shocky ...more
Science-fiction writer Jules Verne predicted many scientific breakthroughs, including the moon landing, tasers, and nuclear submarines. In his 1874 book The Mysterious Island, Verne writes: I believe that water will one day be employed as fuel, that hydrogen and oxygen which ...more
Apple's iOS 16.3 update for iPhone had impressive new features, but iOS 16.4 might impress you even more. The latest iPhone update was released on Monday, March 27 — a day earlier than Apple Music Classical, Apple's new classical music streaming service — has at least 30 more ...more
OnePlus surprised the mobile industry last year when it revealed the OnePlus 3T in November, an improved version of the OnePlus 3 that came out just months earlier in June. While many thought this was a fluke, history has repeated itself with the arrival of the OnePlus 5T. It ...more
Most of us have conducted an investigatory science project without even knowing it, or at least without knowing that's what it was called. Most science experiments performed, from elementary to high school students and all the way up to professional scientists, are investigato ...more
A deck of cards may be a magician's best way to demonstrate his or her's sleight of hand, but for the prankster, it's the perfect way to deliver a shocking 300 volts of electricity! And that's exactly what I'm going to show you how to do today. Stuart Edge used it in his "Elec ...more
What's the first thing you would do once you realized you were lost in, say, a desert? If you're like me, you would immediately pull out your cell phone and start dialing every number. But what if you have no service? What if your battery is dead? If you make this survival so ...more