Not to be confused with the band, ABBA switches are so named because they reverse outputs such that they fire in A-B-B-A order. So, your redstone devices will essentially fire in one order (A and then B) when activated, and then deactivate in the reverse order (B and then A).
PDF is a convenient format for documents that can embed text and pictures and can be read by almost any device—personal computers, laptops, smartphones, etc. However, PDFs are mostly read-only files, so sometimes it's necessary to convert them to JPG images, a universal format for pictures. JPGs can be modified by software such as Adobe Photoshop or posted on Facebook.
Popsci has posted 2009's most amazing scientific images, and there's quite a few great ones in there. A few of our favorites below, click through for all 62.
So I couldn't help but notice that a lot of the hidden base designs in minecraft are cliche and obvious, the two I am about to show you would never be found legitimately unless someone saw your name through the ground or followed you.
This week, I've been working on a project that sort of takes a spin off an old-style potato gun. Using PVC pipe and the rapid combustion of hairspray, we can launch a rocket hundreds of feet into the sky. As usual for my projects, I tried to use only materials and parts that are commonly available. I even give two different forms of ignition, in case one method ends up being hard to come by. The following video will explain the project further: The launcher can be reloaded and fired repeatedl...
Welcome to Minecraft World! Check out our advanced tutorials and come play on our free server. This past weekend, our Weekly Workshop focused on building a suffocation trap. But today, we're going to be covering a different type of redstone trap in Minecraft—one with a 100% success rate (perfect for PvP servers).
The trinele knot is very strong knot used in fishing. This outdoor recreation HowTo video animation tutorial walks you through the step by step process of the trilene knot. Watch closely to learn how to tie this essential fishing knot.
Fight anxiety with food Most of us get exposed to anxiety and social problems that increase depression.
Light-weight, tiny, and easily doable, Mark Jurey's penny stove instructional demonstrates how to make a sleekly simple (and cheap) camping stove.
In this video, we learn how to hack a toy slot machine. If you time it right, you can win the jackpot yourself. You can slot the parts of the slot down with your just finger by pressing on them. You can also press down on the side of the slot just hard enough so you can press on the numbers hard enough. Once you hear the click on the machine, you will win the jackpot. Try doing this several times until you have pressed it with just the right amount of pressure. When done, you will get the mon...
In this how-to video, you will learn how to stop while going backwards on roller skates. This will help if you are going too fast and want to stop without falling. Make sure your knees are not locked and you are not going too fast. Take the dominant leg and position it slightly behind you. Next, apply firm but solid pressure on the stopper. Be careful not to place too much, as this will turn you around. Another way involves immediately going back on both stoppers. Your knees must be bent with...
This video demonstrates how to do water bath canning. From the people who brought you the Dummies instructional book series, brings you the same non-intimidating guides in video form. Watch this video tutorial to learn how to do water bath canning, For Dummies.
Learn how to tie this Boy Scouts knot. The tautline knot builds a loop that will easily get bigger - by sliding the knot up the rope toward the free end. But, when pressure is applied to the loop, it will not get smaller. Its most common use in Boy Scouts is on the ropes that attach a tent to tent stakes in the ground. The loose end is attached to the tent. The loop goes around the stake and the knot slides by hand to tighten or loosen the rope. But the tautline hitch knot will not slide by i...
Watch this video from This Old House to learn how to install a stand-by generator. Steps:
This video demonstrates first aid for serious bleeding. Lay the injured person down with head slightly lower than the trunk or elevate wound above the level of the heart. Apply pressure, after bleeding stops, wrap tight with sterile gauze bandage. Get medical help for the victim. Good video for camping or just good knowledge for home. Stop someone from bleeding.
Many things cause a bike tire to deflate. Glass, sharp rocks, tacks, and nails can pierce the tire and puncture the tube within. A tube can be pinched between the rim and tire causing the tube to split when inflated. If a tire has a hole in it, the tube, which is filled with air pressure, will bulge out of the opening and pop. As well, the valve holding the air pressure in the tube can be damaged or faulty.
The microwave has an extraordinary number of uses that goes above and beyond reheating your cold leftovers from last night's dinner. For food-related uses, the microwave can also make your lemons more squeezable for maximum juice output, roast garlic heads, decrystallize hardened honey, dry up fresh herbs, and more.
Electrical engineer Greg Leyh and company are currently creating a pair of 118-foot Tesla coils! The largest coil built to date is an 18-story tower constructed back in 1903 by Tesla himself, but Leyh has decided to not only recreate the huge coil, but double it in size. The project goes by the name of "Lightning on Demand" and is currently being constructed on an 81-acre plot in the Nevada desert. Once it's finished, the pair of coils will output 10 million volt acres 100 yards long—the size...
Find Hipstamatic too nostalgic? Instead of trying to emulate film from fuzzy bygone days, iPhone app Decim8 goes in a different direction—futuristic digital destruction. The $0.99 app creates digital artifacts, putting your photos through a glitchy blender and spewing out surprise results. The app arranges/activates effects at random, and never churns out the exact same effects twice. It allows for full size photo output, and saves the original, uneffected image, in addition to the glitched i...
Gino was born in Australia, but spent his formative years in Rome. As a child he was fascinated by the architecture, sculptures, fountains and the works of the masters that surrounded him. The craftsmanship and attention to detail was indelibly etched into his own creative expression and his drive to achieve the same level of perfection in his work.
Ingredients 3 tablespoons unsalted butter, cut in 1/4-inch cubes, divided
What is Indirect Care? Does it affect the CNA's exam result? Indirect Care entails your behavior in terms of how you communicate with the resident, valuing residents' rights and residents' safety and security. Indirect Care is absolutely important because: (1) it is a graded performance, (2) it has separate score ratings, and (3 )it greatly affects the testees' overall performance during the clinical skills exam.
Super Ventures has published "The AR Landscape," a chart encompassing the major players and startups that are shaping augmented reality. Launched in February as the first incubator and fund focused on augmented reality, Super Ventures outlines companies working augmented reality applications, tools, devices, input/output methods, and components. The AR Landscape lists 312 companies, representing $12.1 billion in funding and $69.6 billion valuation. It runs the gamut from startups and innovato...
Just like magic - incredible new project from Sweatshoppe in which video is "painted" onto a wall. Video demonstration below, (don't miss it! absolutely visually amazing).
Have a flat tire on your bicycle? No problem... let High Altitude 2U help you out with their video tutorial.
Bring the circus into your home with this famed acrobatic cards trick. Watch magician Ryan Oakes teach you how to make your old deck of cards do a little dance. You will need one
Want to increase your creativity, attention span, intuition, self-knowledge—maybe even your sense of oneness with the universe? Start meditating on a regular basis. In addition to improving your concentration, mental health, and capacity to handle stress, regular meditation practice has also been scientifically proven to have numerous physical benefits such as lowering your blood pressure, improving your immune system, and adding more life to your years.
This is the first boss we are releasing out of a "boss series" coming soon this summer! Using redstone, I think we managed to get the "boss feeling" in minecraft!
Assuming that you're not a burglar-in-training, you may one day find yourself in a situation where you have to break into a home through a door chain lock. But what to do if you have no time to wait for a locksmith?
Six months after President Obama ordered 100 elite troops to help capture the messianic warlord Joseph Kony, U.S. military commanders said Sunday that they have been unable to pick up his trail but believe he is hiding in this country’s dense jungle, relying on Stone Age tactics to dodge his pursuers’ high-tech surveillance tools.
Today's digital cameras record not only the images themselves, but also the metadata behind the scenes, like camera settings, location, date, time, etc. But there's a lot more to say about a photograph. What's the subject? Is it night or day? Outside or inside? Person, place or thing?
The United States asked Russia to send Iran a message that the upcoming round of nuclear talks is its last chance to avoid a military confrontation this year, Russian newspaper Kommersant reported Wednesday according to a diplomatic source.
Your BIOS, or Basic Input Output System, is the firmware on your motherboard responsible for initializing your computer's hardware when it is first powered on. It probes for video adapters, RAM, the whole works. The BIOS provides a small library of basic input/output functions used to operate and control the peripherals such as the keyboard, text display functions and so forth, and these software library functions are callable by external software such as the OS and system software within sai...
What do you do when you have a bottle of wine ready to uncork, but no corkscrew on hand?
Incredibly bizarre, Mika Satomi and Clemens Pichler have designed a pair of DJ hoodies to theatrically visualize a DJ battle. Unfortunately, for me at least, Human Centipede is evoked (damn, I shouldn't have seen that movie).
There is an abstinence game being created by the University of Central Florida with $400k+ of taxpayer money. The game is directed at middle school girls to help them handle and cope with sexual advances.
Here at WonderHowTo, we certainly have an affinity for outer space-related topics, so I couldn't pass up this horrifying video of a man who just barely survived a simulated space vacuum.
What a ballplayer does prior to puberty is no indicator of his future potential. Whether he plays 30
Martha Stewart answers questions about serving tropical fruit. Allow mangos to ripen; when it's ready it will give slightly when pressed. As with any other fruit, make sure to smell it first, good ones will have a fragrant aroma. Choose kiwis that are large and plump and give slightly to gentle pressure. Passion fruit is ripe when it has a wrinkled, dimpled purple skin. Peel and slice mango, kiwi and passion fruits.
Are you feeling flu-like symptoms that involve fever, headache, muscle pains, vomiting, and a skin rash? Take a glass cup and press the glass surface against your skin. If the rash doesn't fade under pressure like a normal skin rash, then you are suffering from meningitis and you need to seek medical attention right away.
