Do you long for a more pronounced way to rage quit video games? Smashing buttons comes naturally, of course, but this hurts the controller or keyboard. You can quit your longing, because [Insert Controller Here] has an elegant solution that’s worth its salt.
The Salty Rage Quit Controller is simple. The cup is filled with distilled water. When you pour salt in it, the two bolt terminals tell the Arduino Micro that the resistance in the water has decreased. The Micro sends whatever keystrokes you want, so you could call out your deadbeat medic before quitting, or just plain leave. [Insert Controller Here] has example code on his site to get you started. Click calmly past the break to watch the demo and build videos, or we’ll have to ban you for aggro.
With the right tools, you can turn anything into a game controller. Check out this car controller that uses Python and CAN bus sniffing.
Continue reading “Salty? Tip Canister To Rage Quit Games”
In the fall of 1957, it seemed as though the United States’ space program would never get off the ground. The USSR had launched Sputnik in October, and this cemented their place in history as the first nation in space. If that weren’t bad enough, they put Sputnik 2 into orbit a month later.
By Christmas, things looked even worse. The US had twice tried to launch Navy-designed Vanguard rockets, and both were spectacular failures. It was time to use their ace in the hole: the Redstone rocket, a direct descendant of the V-2s designed during WWII. The only problem was the propellant. It would never get the payload into orbit as-is.
The US Army awarded a contract to North American Aviation (NAA) to find a propellant that would do the job. But there was a catch: it was too late to make any changes to the engine’s design, so they had to work with big limitations. Oh, and the Army needed it two days before yesterday.
The Army sent a Colonel to NAA to deliver the contract, and to personally insist that they put their very best man on the job. And they did. What the Army didn’t count on was that NAA’s best man was actually a woman with no college degree.
Continue reading “Mary Sherman Morgan, Rocket Fuel Mixologist”
[Uri Tuchman] doesn’t always write with a dip pen. But when he does, he gets tired of re-inking it almost immediately. Now, convenience comes in many forms. He could make the switch to any number of modern writing instruments, sure. But that would be throwing out the baby with the bathwater.
[Uri] decided that old-timey problems call for old-timey solutions, and we couldn’t agree more. His machine is an amazingly well-crafted automaton that dips a handmade pen into ink and shakes off the excess with the turn of a crank and the nudging of cams. We love the hand-carved claw, which looks perfectly absurd as it moves about gracefully on custom brass hinges.
We were somewhat surprised that given all this work, [Uri] didn’t grind his own nib or make his own ink. But that would cut down on the time he has to write letters longhand in between waiting for a wet quill. Crank past the break to see [Uri]’s thoroughly entertaining build video for this awe-inspiring machine.
Mesmerized by automatons? This laser-cut water droplet wave should quench your thirst.
Continue reading “Ink-Dipping Machine Saves Iotas Of Time”
There are birthday presents, and then there are birthday presents. You know, the amazing ones that are the polar opposite of phoning it in. This is one of those presents.
So, [peterbrazil]’s wife is a rural mail carrier on a small island. For her upcoming birthday, he wanted to build a lil’ something she could show off in the local Tractor Days Parade. He found an old Cub Cadet riding mower that was destined for the dump, and the rest is well-documented history.
This glorious conversion required a lot of frame work, but it’s obvious this wasn’t [peterbrazil]’s first rodeo. He got some tires and tie rods from a friend who used to race lawnmowers (yeah, really) and went from there. He wanted this rat rod to be totally slammed (lowered as far as possible), but that would prohibit [Mrs. peterbrazil] from riding it ’round the farm after her parade dust settles. Instead, he went for the raked look, which means the front is lower than the back.
We love all of the reuse here, which includes a wheelbarrow cleverly cut into a seat and a dashboard, an old mailbox for a bed/cargo box, and a pitchfork grill. There are some modern touches as well, like a 3D printed mailbox shift knob with a working door, printed ignition switch box for the dash, and an adapter that makes room for a huge cone air filter. The seat cushion is a nice touch, too—the sunflower fabric adds both femininity and farm flavor to the build.
Always wanted to build a hot rod, but don’t have the garage space? Get some traction with an R/C rod.
If you don’t have access to a 3D scanner, you can get a lot done with photogrammetry. Basically, you take a bunch of pictures of an object from different angles, and then stitch them together with software to create a 3D model. For best results, you need consistent, diffuse lighting, an unchanging background, and a steady camera.
Industrial designer [Eric Strebel] recently made an Intro to Photogrammetry video wherein he circled an object taking photos with his bare hands. One commenter suggested a different method: build a donut-shaped turntable that circles the object, which sits on a stationary platform. Attach the camera to the donut, counterbalance the weight, and Bob’s your proverbial uncle. [Eric] thought it was a brilliant idea (because it is), and he built a proof of concept. This is that video.
[Eric] can move the camera up and down the arc of the boom to get all the Z-positions he wants. The platform has a mark every 10° and there’s a pointer in the platform to line them up against for consistent camera positioning. He was pleasantly surprised by the results, which we agree are outstanding.
We always learn a lot from [Eric]’s videos, and this one’s no exception. Case in point: he makes a cardboard mock-up by laying out the pieces, and uses that to make a pattern for the recycled plywood and melamine version. In the photogrammetry video, he covers spray paint techniques to make objects reflect as little light as possible so the details don’t get lost.
If you prefer to rotate your objects, get an Arduino out and automate the spin.
Continue reading “For Better Photogrammetry, Just Add A Donut”
Have you shopped for an appliance lately? They’re all LEDs, LEDs everywhere. You might say that manufacturers are out of touch with the utility of tactile controls. [Wingletang]’s fancy new washing machine is cut from this modern cloth. While it does have a nice big knob for selecting cycles, the only indication of your selection is an LED. This isn’t an issue for [Wingletang], but it’s a showstopper for his visually impaired wife.
They tried to make tactile signposts for her most-used cycles with those adhesive rubber feet you use to keep cabinet doors quiet. But between the machine’s 14(!) different wash cycles and the endlessly-rotating selector knob, the tactile map idea was a wash. It was time to make the machine talk.
For his very first microcontroller project, [Wingletang] designed a completely non-invasive and totally awesome solution to this problem. He’s using LDRs arranged in a ring to detect which LED is lit. Recycled mouse pad foam and black styrene keep ambient light from creating false positives, and double as enclosure for the sensor and support boards. As [Mrs. Wingletang] cycles through with the knob, an Arduino clone mounted in a nearby project box determines which program is selected, and a Velleman KA02 audio shield plays a recorded clip of [Wingletang] announcing the cycle number and description.
The system, dubbed SOAP (Speech Output Announcing Programmes), has been a great help to [Mrs. Wingletang] for about the last year. Watch her take it for a spin after the break, and stick around for SOAP’s origin story and walk-through videos.
It’s baffling that so few washers and dryers let you know when they’re finished. Don’t waste your time checking over and over again—Laundry Spy waits for the vibrations to end and sends you a text.
Continue reading “Talking Washer Is A Clean Solution For The Visually Impaired”
Acquiring a new YouTube subscriber is a blessed event that deserves far more fanfare than a phone notification. But maybe blinkenlights don’t really do it for you anymore, or you simply prefer to be soothed sonically rather than visually. Well, what could be more satisfying than the crisp clack of an electromechanical 7-segment display? Six of them, of course. These things look great, they sound great, and once they’re set, they don’t need power to stay that way.
These displays switch between black and white by reversing current flow through their electromagnets, so [Zack] turned to the H-bridge in order to use them with DC. One H-bridge for each segment of six displays adds up fast, though. To get around this, [Zack] tied one pole of each electromagnet together for a common signal input, and used the other pole to control each segment individually. Then, he was able to tie all the A segments together, all the B segments, and so on, and only needs 13 H-bridges to do it all.
There was just one thing [Zack] didn’t count on. Once he got the board soldered up and running, the displays started acting funny. The low impedance of the coils was causing them to influence each other over the common path, so he added diode arrays to keep them in line.
[Zack]’s using an ESP32 to get the 411 through the Google API, and four octal serial switches to drive the displays. Even more satisfying than all those clacks is the displays’ operational economy baked into [Zack]’s code—as they count up, any segments common to the first digit and the next digit remain on. Increment your way past the break to check out the build video.
Not focused on numbers, but still want to celebrate each new sub? Try a dancing robot or a Tetris twist.
Continue reading “Electromechanical YouTube Sub Counter Trades Clicks For Clacks”