Posts filed under ‘Gadgets and Toys’
You Can Easily Buy Tamper Proof Screwdrivers
I have a long history of taking things apart; as a Child I had a reputation for never putting them back together. There is some truth to that, but somethings are more fun in pieces.
Before I understood how they worked, I saw things as magic boxes. I wanted to know how the engineers solved all of the problems that made the product useful; what were their secrets?
As an adult, I still like taking things apart. Sometimes, I want to know how it works; other times it doesn’t work and I want to fix it, or break it further.
Unfortunately, it’s not always easy to disassemble things.
If you’re like me, you’ve probably tried to disassemble something and then realize you don’t own a screwdriver that can turn a triangular notched screw-head. Or, maybe you have noticed funny looking screw-heads in public restrooms. Not the people, the metal screws used on fixtures and cubical walls. If you don’t recognize the pattern on the screw-head, they’re likely what we call “tamper proof” screws. (more…)
Your Eyes Adapt to Darkness In 20-30 Minutes
If you’ve shopped for an HDTV, you’ve probably seen something on the spec sheet called “contrast ratio.” Contrast ratio is the difference between the darkest and brightest picture a TV can produce. Contrast is important to a good picture.
That’s because our eyes can recognize a contrast difference of 1,000,000,000:1. That means, the brightest thing our eyes can see is a billion times brighter than the darkest thing. Good contrast to your eyes is like a gourmet meal for your taste buds. Contrast adds a lot of detail to the picture and ultimately immerses you in the action.
Unfortunately, when shopping for TVs, contrast ratio is almost meaningless. It could be really useful, but all of the manufacturers measure this number differently and then call it the same thing — it’s really only useful when comparing two TVs from the same manufacturer.
Imagine you want to buy a new car: you are cross shopping three manufacturers who measure fuel economy in three different ways. The first one, measures fuel economy while driving down a hill, while the other two measure it on flat land and while driving up a hill. Obviously, you can’t compare the results of those tests. But, if you’re looking at two cars from the same manufacturer then there is some comparative value to those numbers, even though they may not be accurate in a typical situation.
Thankfully, our eyes are extremely sensitive to contrast. Turn both TVs on and look at a flat black image for a while. A flat black image makes it easy to spot variations in darkness (aka “banding”), no banding should be present in a good TV. If you still can’t tell the difference and they both look good, then the difference is too small to worry about. Trust your eyes, they are incredible instruments.
It takes 20-30 minutes for your eyes to adjust from one extreme to the other because the contrast ratio is so high. If you’re in bright sunlight and then walk into a very dark room, it will take 20-30 minutes before you can see your best in that room. If you are in a moderately bright room and go into a very dark room, it is often closer to 15 minutes.
The rods and cones in your eye are tested during dark adaptation. Rods are more sensitive to light and take longer to adjust. Cones are much faster to adjust, often in approximately 9 minutes. People over the age of 50 need twice as much light to see as well in the dark as a 30 year old. So, if you need more light, consider my CF light secret.
Frequent fliers will eventually notice that the aircrew dims the airplane’s interior lights on final approach during night landings . They want your eyes to be adjusted to the darkness outside in case the landing does not go as expected and you have to evacuate the plane.
Broken Secrets
Written By: Chad Upton
Available on Kindle
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Sources: Why Planes Dim Interior Lights, Adaptation (Eye), Contrast Ratio, Growing Older
How Do You Solve a Rubik’s Cube?
When you bought your Rubik’s cube, it was already solved. If you just left it alone, you wouldn’t have to solve it. I’m just saying.
Of course, we all know it’s impossible to leave it alone. You have to mess it up. At first, you turn a couple rows and then turn them back. Then you turn a few more and a few more again and eventually, you can’t get it back! Now, you have to actually solve the puzzle.
To make a short story long, you’ll try to solve it by working very little over a long period of time.
Rubik’s cube will sit on your shelf for a few days before you try it again. Over the next six months it will get picked up by a few smartypants friends who want a crack at it. After another year, you may pick it up and work on it for a short time, maybe even get one or two sides complete. Again, you’ll put it down for the next rainy day. It will seem like you’ve worked really hard on it, but you haven’t. Still, there comes a time in every cube owner’s life when they decide it needs to be solved, at any cost.
From my experience, there are three approaches to solving a Rubik’s cube.
I learned the first strategy from my brother when we were children. Every time we visited my Grandfather, he’d be working on his cube. On one visit, our small minds were blown when we realized he solved the cube. As I already stated, it’s impossible not to mess up a solved Rubik’s cube, and that’s especially true when it belongs to someone else.
When my grandfather realized we unsolved the Rubik’s cube, he told us that we’d have to re-solve it before we left. He was serious, or at least we thought so at the time. My brother’s solution, which I thought was pretty clever: peel off all the colored stickers and reapply them on matching sides. Although we got all the colors in the right places, it was still a big mess — similar to our paint-by-numbers work.
These days, I’d consider that cheating. But, it’s a good strategy to be aware of, you never know when you’ll be in a hostage situation that is one Rubik’s cube away from freedom.
The second approach comes in true internet style: have your computer solve it for you! Your computer is probably smarter than you anyway, why let that talent go to waste?
There are a number of web-based Rubik’s cube solvers. Basically, you paint the onscreen Rubik’s cube to look like yours and it generates a list of moves required to solve it. Click here for one that I have vetted. It works on the traditional 3 x 3 cube, and also on the newer 2 x 2 and 4 x 4 cubes. This is still cheating. But, it’s much less detectable than relocating the colored stickers.
Finally, the official approach, sanctioned by Rubik himself. This is the cross, corner, middle, top, corner method. It’s a combination of moves that systematically solve the cube. Once you know these moves, you can solve any cube. For the complete tutorial, click here.
The original 3 x 3 cube is a classic. But, they have released many different versions of the Rubik’s cube and similar puzzles. There is even a touch screen Rubik’s cube called the TouchCube. Click on the picture to check it out.
Broken Secrets
Written by: Chad Upton
[Available on Kindle]
Broken Secrets 