Is your keyboard too quiet? Is your Cherry MX Blue board not driving your coworkers crazy enough? If the machine gun fire of a buckling spring keyboard isn’t enough for you, there’s only one solution: [Russell]’s typewriter turned into a mechanical keyboard.
Converting typewriters into keyboards has been done for a very long time; teletypes, the first computer keyboards, were basically typewriters, and the 1970s saw a number of IBM Selectrics converted into a keyboard with serial output. Even in recent years, typewriters have been converted into keyboards with the help of some switches and an ATMega. [Russell]’s mechanical keyboard improves on all of these builds by making the electronic interface dead simple, and a project that can be done by anyone.
Instead of installing switches underneath every key or futzing about with the weird mechanics of a Selectric typewriter, [Russell] is only installing a touch-sensitive position sensor into the frame of the typewriter. When a key is pressed, it strikes a crossbar in the frame of the typewriter. With a single ADC chip and a Raspberry Pi, [Russell] can determine which key was pressed and use that information to output a character to a terminal.
It’s a very simple solution for an electrical interface to a mechanical device, and the project seems to work well enough. [Russell] is using his new keyboard with Vim, even, something you can check out in the video below.
Tablet computers have come a long way, long way. It finally seems like they’ve found their niche in the market, and now maybe they can catch up to more traditional computers. The Microsoft Applied Sciences division came up with a cool prototype design for a new tablet, one with a secondary e-ink input display.
The tablet interface makes use of e-ink strip above the keyboard. While it might not seem like much, this frees up a bunch of screen real estate, allowing you to have various icons and shortcuts off screen. It makes a ton of sense for digital artists as they can draw on the screen, but also have their toolkit open right below them — almost like real painting/drawing.
One of the other great uses for something like this is a signature pad — with everything going digital, when is the last time you had to print, sign, and scan a document back to someone? They even developed a dedicated email app you can use solely on the e-ink screen, allowing you to maximize the use of your main screen for something like a video chat.
The demo is pretty cool, and we often wonder why there aren’t more phones with e-ink displays integrated into them — is this just the beginning?
[Garrett Greenwood] plays Smash Brothers, and apparently quite seriously. So seriously that he needed to modify his controller with five Neopixels so that it flashed different color animations according to the combo he’s playing on the controller; tailored to match the colors of the moves of his favorite character, naturally.
All of this happens with an ATtiny85 as the brains, which we find quite ambitious. Indeed, [Garrett] started out thinking he could simply read each of the inputs from the controller directly into the microcontroller at the heart of the whole thing, but then counted up how many wires that would be, and looked at how many pins he had free (six), and thought up a better solution.
[Garrett]’s routine instead reads the single line that the Gamecube controller uses to send back to the console. The protocol is well understood, using long-short and short-long signals to encode bits. The only trick is that each bit is sent in four microseconds, so the decoding routine has to be fairly speedy. To make it work he had to do quite a bit of work. More about that, and the demo video, after the break.
I see the disturbing trend of moving away from keyboards as input devices — and I’m talking about a real, physical keyboard. This isn’t a matter of one decision that kills the keyboard, but an aggregate that is slowly changing the landscape. If you blink, you’ll miss it. We will not find ourselves in a world without keyboards, but in one where most of the available keyboards suck.
Rise of the Virtual Keyboard Generation
Tablets are great for screwing around, but when you want to get real work done in a reasonable amount of time, you grab a physical keyboard. In this scenario I don’t see the problem being those in the workforce going away from keyboards; it’s how the younger generations are learning to interact with technology that is troubling. The touchscreen is baby’s first computer. Families gather and the kids are handed their parent’s tablets while the grown-ups watch the game. More and more schools are outfitting classrooms with tablets, and for this I’m an advocate. Getting kids involved early in technology is imperative; knowledge evolves much more rapidly than printed textbooks. The tablet is a powerful tool in both of these areas. But most of the screen time kids get is with touchscreens and no physical keyboard.
How much time are K-12 kids spending in front of a physical keyboard? In the United States, if keyboard (typing) classes exist at all in a public school’s curriculum they’re usually only one-semester. Students who spend half of Elementary school using a tablet, and just one semester at a keyboard, are bound to prefer touchscreen-based entry over a physical keyboard.
We’ve already seen a strong push into touch-screens on laptops as the tablet market has grown. This is not necessarily a bad thing. Think of the computer mouse, it didn’t replace the keyboard, but augmented it and now is seen as a tool that itself is a necessity.
Hide in plain sight is an old axiom, and one that [Kipkay] took to heart. His sneaky keyboard hack takes the little-used numeric keyboard and converts it to a handy (and secret) hiding hole for small objects you want to keep away from prying eyes.
You might have to adapt the hack to your specific model, but [Kipkay] cuts out the membrane keyboard, secures the numeric keypad keys with hot glue, and then cuts it out with a Dremel. Some cardboard makes the compartment and once the fake keypad is in place, no one is the wiser.
As you can see in the clip after the break, the compartment isn’t very big. You aren’t going to hide your phone inside, but it is just the right size for some emergency cash, a credit card, or maybe an SD card or two.
Last week we gave away a few Crazyflie 2.0 quadcopters to some cool Hackaday Prize entries. This quadcopter ships with the intention of being controlled by your smartphone. But it can also be controlled by a PC with USB dongle and an nRF24LU1+ SOC. [ajlitt] didn’t figure out he wanted the USB dongle (the Crazyradio) that can control this quad until after he used his gift code to claim his Crazyflie quad. No matter; the dongles for Logitech wireless keyboards and mice use the same radio as the Crazyflie and can be modded to make this quad fly.
The board inside the Logitech unifying receiver is a simple affair, with some pads for the USB connector, a crystal, the nRF24LU1+ radio module, and a few passives. To get this radio chip working with his computer, [ajlitt] simply needed to break out the SPI pins and wire everything to a Bus Pirate.
Getting the Crazyradio firmware onto this proved to be a little harder than soldering some magnet wire onto a few pins. The chip was first flashed without a bootloader, a full image with the bootloader was found, after wrangling a single byte into place, [ajlitt] had a working Crazyflie radio made from a wireless mouse dongle. The range isn’t great – only 30 feet or so, or about as far as you would expect a wireless mouse to work. Excellent work, even if [ajlitt] is temporarily without a mouse.
What’s the fastest keyboard? Few subjects are as divisive in the geek community. Clicky or squishy? QWERTY or Dvorak? Old-school IBM or Microsoft Natural? The answer: none of the above.
The fastest normal-keyboard typists (Dvorak or Qwerty) can get around 220 words per minute (wpm) in bursts. That sounds fast, and it’s a lot faster than we type, but that’s still below the minimum speed allowable for certified court reporters or closed captioners. The fastest court reporters clock in around 350 to 375 wpm for testimony. But they do this by cheating — using a stenotype machine. We’ll talk more about stenography in a minute, but first a hack.
[Kevin Nygaard] bought a used Stentura 200 stenotype machine off Ebay and it wasn’t working right, so naturally he opened it up to see if he could fix it. A normal stenotype operates stand-alone and prints out on paper tape, but many can also be connected to an external computer. [Kevin]’s machine had a serial output board installed, but it wasn’t outputting serial, so naturally he opened it up to see if he could fix it. In the end, he bypassed the serial output by soldering on an Arduino and writing a few lines of code.
The serial interface board in [Kevin]’s machine was basically a set of switches that made contact with the keys as they get pressed, and a few shift registers to read the state of these switches out over a serial connection. [Kevin] tapped into this line, read the switch state out into his Arduino, and then transmitted the correct characters to his computer via the Arduino’s serial over USB. (Video demo) As hardware types like to say, the rest is a simple matter of software.