Hackaday Prize Entry: Dongle For A Headless Pi

Mass production means that there’s a lot of great hardware out there for dirt cheap. But it also means that the manufacturer isn’t going to spend years working on the firmware to squeeze every last feature out of it. Nope, that’s up to us.

[deqing] took a Bluetooth Low Energy / USB dongle and re-vamped the firmware to turn it into a remote keyboard and mouse, and then wrote a phone app to control it. The result? Plug the USB dongle in, and the computer thinks it sees a keyboard and mouse. Connect the phone via BLE, and you’re typing — even if you don’t have your trusty Model F by your side.

[Deqing] points out that ergonomics and latency will make you hate using this in the long term, but it’s just meant to work until you’ve got SSH up and running on that headless single-board Linux thing. If you’ve ever worked with the USB or BLE specifications, you can appreciate that there’s a bit of work behind the scenes in making everything plug and play, and the web-based interface is admirably slick.

Kudos, [deqing]!

DIY Shortcut Keyboard

Working with CAD programs involves focusing on the task at hand and keyboard shortcuts can be very handy. Most software packages allow the user to customize these shortcuts but eventually, certain complex key combination can become a distraction.

[awende] over at Sparkfun has created a Cherry MX Keyboard which incorporates all of the Autodesk Eagle Shortcuts to a single 4×4 matrix. The project exploits the Arduino Pro Mini’s ability to mimic an HID device over USB thereby enabling the DIY keyboard. Pushbuttons connected to the GPIOs are read by the Arduino and corresponding shortcut key presses are sent to the host machine.

Additional functionality is implemented using two rotary encoders and the Teensy encoder library. The first knob functions as a volume control with the push-button working as a mute button. The encoder is used to control the grid spacing and the embedded button is used to switch between imperial and metric units. The entire code, as well as the schematic, is available on GitHub for your hacking pleasure. It’s a polished project just ready for you to adapt.

The project can be extended to be used with other computer software such as Gimp and the keys may be replaced by capacitive touch sensors making it more sturdy. Bluetooth can be added to make things wireless and you can check out the Double Action Keyboard to extend functionality further. Continue reading “DIY Shortcut Keyboard”

Mitosis: Anatomy of a Custom Keyboard

Ergonomic. Wireless. Low-latency. Minimalist. Efficient. How far do you go when you design your own open-source keyboard? Checking off these boxes and providing the means for others to do so, Redditor [reverse_bias] presents the Mitosis keyboard, and this thing is cool.

The custom, split– as the namesake implies — mechanical keyboard has 23 keys on each 10 cm x 10 cm half, and, naturally, a custom keymapping for optimal personal use.

Upper and lower PCBs host the keys and electronic circuits respectively, contributing to the sleek finished look. Key caps and mechanical switches were ripped from sacrificial boards: two Waveshare core51822 Bluetooth modules are used for communication, with a third module paired with a Pro Micro make up the receiver. Continue reading “Mitosis: Anatomy of a Custom Keyboard”

The Tiniest Mechanical Keyboard Ever

Owning a mechanical keyboard makes you a better person. It puts you above everyone else. Of course, owning a mechanical keyboard does come with some downsides. Carrying a mechanical keyboard around all the time to tell everyone else you’re better than them is usually impractical, but [cahbtexhuk Joric] has come up with a solution. It’s a miniature Bluetooth mechanical keyboard that’s also a keychain.

Continue reading “The Tiniest Mechanical Keyboard Ever”

Wherein The Mechanical Keyboard Community Discovers Motorized Linear Potentiometers

Deep in the bowels of the Digikey and Mouser databases, you’ll find the coolest component ever. Motorized linear potentiometers are a rare, exotic, and just plain neat input device most commonly found on gigantic audio mixing boards and other equipment that costs as much as a car. They’re slider potentiometers with a trick up their sleeve: there’s a motor inside that can set the slider to any position.

The mechanical keyboard community has been pushing the boundaries of input devices for the last few years, and it looks like they just discovered motorized linear pots. [Jack] created a motorized sliding keycap for his keyboard. It’s like a scroll wheel, but for a keyboard. It’s beautiful, functional, and awesome.

The hardware for this build is just about what you would expect. A 60 mm motorized linear pot for the side-mount, or 100 mm mounted to the top of the keyboard, is controlled by an Arduino clone and a small motor driver. That’s just the hardware; the real trick here is the software. So far, [Jack] has implemented a plugin system, configuration software, and force feedback. Now, messing with the timeline in any Adobe product is easy and intuitive. This device also has a ‘not quite vibration’ mode for whenever [Jack] gets a notification on his desktop.

Right now, [Jack] is running a group buy for this in a reddit thread, with the cost somewhere between $55 and $75, depending on how many people want one. This is a really awesome product, and we can’t wait for Corsair to come out with a version sporting innumerable RGB LEDs. Until then, we’ll just have to drool over the video [Jack] posted below.

Continue reading “Wherein The Mechanical Keyboard Community Discovers Motorized Linear Potentiometers”

This Binary Keyboard Is For ASCII Purists

So, you’re a keyboard enthusiast. The ‘board that came from Dell, HP, or whoever made your computer is just not for you. You have an ancient IBM, a decal-free Das Keyboard, or another similarly esoteric text input device. Your typing can be heard three blocks away as the unmistakable clack of bent-spring switches reverberates around you, but you don’t care because you’re in the Zone.

No keyboard can be as high-end as the one you already have, your position in the hierarchy of text entry is assured. But then along comes [Chris Johnston] with his project, and suddenly your desktop looks very cluttered. It’s a binary keypad with only a 0 key, a 1 key, and an OLED display. All input is as a series of binary bytes, so as a hardcore binary typist you’ll need to know your ASCII.

Behind the keys is an Arduino Pro Micro acting in USB HID mode, and running the code you can download from the GitHub link above. It’s a gloriously pointless input device, but we’re sure you’ll agree it has something of the 00110001 00110011 00110011 00110111 about it.

If you think you may have seen this before on Hackaday then you’re not quite right. We have had a binary keypad in the past, but that one had a return key and thus had three keys. This one’s a 2-key ‘board for binary purists.

[via /r/mechanicalkeyboards/]