A Custom Keyboard At Maximum Effort

No one loves hacked keyboards more than Hackaday. We spend most of our workday pressing different combinations of the same 104 buttons. Investing time in that tool is time well spent. [Max] feels the same and wants some personality in his input device.

In the first of three videos, he steps us through the design and materials, starting with a layer to hold the keys. FR4 is the layer of fiberglass substrate used for most circuit boards. Protoboards with no copper are just bare FR4 with holes. Homemade CNC machines can glide through FR4, achieving clean lines, and the material comes in different mask colors so customizing an already custom piece is simple. We see a couple of useful online tools for making a homemade keyboard throughout the videos. The first is a keypad layout tool which allows you to start with popular configurations and tweak them to suit your weirdest desires. Missing finger? Forget one key column. Extra digit? Add a new key column. Huge hands? More spaces between the keys. [Max] copied the Iris keyboard design but named his Arke, after the fraternal sister to Iris which is fitting since his wrist rests are removable. Continue reading “A Custom Keyboard At Maximum Effort”

Sunny Custom Keyboard Illuminates the Past

Ever wonder why keyboard number pads and telephone dials have reversed layouts? Theories abound, but the most plausible one is that, shrug, it just happened that way. And now we’re stuck with it.

Well, that answer’s not good enough for [Jesse], so he punched up his own keyboard design that combines the golden years of function-rich Sun and IBM keyboards with Ma Bell’s DTMF number arrangement. That’s right, Sundial has 24 function keys total, and the number pad matches Ma Bell’s all the way down to the asterisk/zero/octothorpe pattern on the bottom row. How do we know what the unlabeled ones are, you ask? It’s all mapped out in this layout editor. We love that it has all the key lock indicator lights, because that practice should’ve never faded out in the first place.

Though inspired by this beautiful unicorn of an Arduino keyboard we covered a few months ago, the Sundial uses a Teensy 2.0 to translate [Jesse]’s Cherry MX clone-driven wishes into software commands. It’s also painstakingly hand-wired, so here’s the build log for you to drool over. Just cover up your keyboard first.

Circuit Bent Keyboard is Pretty in Pink

If you’re anything like us, more than a few of your projects were borne out of the fact that you had some crusty bit of gear that was badly in need of a second lease on life. Whether it was a hand-me-down or pulled out of the garbage, we’ve all at one time or another had some piece of hardware in our hands that might not be worth anything in its current form, but would make an awesome excuse for warming up the soldering iron.

That’s what happened when [joekutz] got his hands on this exceptionally juvenile keyboard toy. In its original state, it was so janky it couldn’t even reliably detect two keys being pressed at the same time; sort of a problem for a keyboard. So he decided to pull it apart and use it as a circuit bending playground. Thanks in part to how much free space was inside of the case, he was able to pack in a number of interesting modifications which he’s kindly detailed on Hackaday.io.

[joekutz] started by adding a headphone jack to the device, as well as a switch to disable the keyboard’s speaker. That allows not only listening to digital jams in private, but makes it possible to capture high-quality audio when connected to the computer. He then started poking around the PCB with a resistor and listening for changes. When the pitch of the keyboard changed, he soldered a potentiometer into its place and now had a way to adjust it on the fly.

Of particular note is the clever physical reverb he came up with. A microphone and speaker are connected to each other with a spring made out of an old guitar string. Audio from the keyboard’s PCB is played on the speaker and a TDA2022 low-voltage amplifier boosts the signal from the microphone. The end result is a very cool ethereal metallic effect.

If you’re looking for a slightly larger DIY reverb, we’ve covered a few builds in the past which should give you some inspiration. You might want to check the dumpster behind the abandoned local Toys R’ Us for some donor keyboards while you’re at it.

Continue reading “Circuit Bent Keyboard is Pretty in Pink”

Turning Tact Switches Into Keyboards

One of the great unsolved problems in the world of DIY electronics is a small keyboard. Building your own QWERTY keyboard is a well-studied and completely solved problem; you need only look at the mechanical keyboard community for evidence of that. For a small keyboard, though, you’d probably be looking at an old Blackberry handset, one of those Bluetooth doohickies, or rolling your own like the fantastic Hackaday Belgrade badge. All of these have shortcomings. You’ll need to find a header for the Blackberry keyboard’s ribbon cable, the standard Bluetooth keyboard requires Bluetooth, and while the Belgrade badge’s keyboard works well, it’s a badge, not a keyboard you would throw in a bag for years of use.

[bobricious] might have just cracked it. For his Hackaday Prize entry, he’s created a tiny USB keyboard out of tact switches. What’s the secret? An entire panel of PCBs. It looks great, and it might just hold up to the rigors of being tossed in a random bag of holding filled with electronics.

The electronics for the keyboard are simple enough; there are 56 standard through-hole tact switches, and an SAMD21 microcontroller. Connections to the outside world are through a micro USB port, serial, or I2C. it’s small, too, coming in at just under 5 cm by 10 cm.

The real trick here is using a stack of PCBs to label the buttons and provide a bit of mechanical support. The panel for this project consists of one base board holding all the electronics and a secondary board that gives the entire project a finished look while adding a bit of structural support.

If you’ve never looked at the options for small keyboards, there aren’t many. Blackberries are a thing of the past, and there’s no good way to add a QWERTY keyboard to small projects. This project does that in spades. Since the basic idea is, ‘put holes in a second PCB’, this idea is transferable to other keyboard layouts too.

Vintage Organ Donates Parts for Two New Instruments

It’s often hard to know what to do with a classic bit of electronics that’s taking up far too much of the living room for its own good. But when the thing in question is an electronic organ from the 1970s, the answer couldn’t be clearer: dissect it for its good parts and create two new instruments with them.

Judging by [Charlie Williams]’ blog posts on his Viscount Project, he’s been at this since at least 2014. The offending organ, from which the project gets its name, is a Viscount Bahia from the 1970s that had seen better days, apparently none of which included a good dusting. With careful disassembly and documentation, [Charlie] took the organ to bits. The first instrument to come from this was based on the foot pedals. A Teensy and a custom wood case turned it into a custom MIDI controller; hear it in action below. The beats controller from the organ’s keyboard was used for the second instrument. This one appears far more complex, not only for the beautiful, hand-held wooden case he built for it, but because he reused most of the original circuitry. A modern tube amp was added to produce a little distortion and stereo output from the original mono source, with the tip of the tube just peeking above the surface of the instrument. We wish there were a demo video of this one, but we’ll settle for gazing at the craftsmanship.

In a strange bit of timing, [Elliot Williams] (no relation, we assume) just posted an Ask Hackaday piece looking for help with a replacement top-octave generator for another 1970s organ. It’s got a good description of how these organs worked, if you’re in the mood to learn a little more.

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Motion-Controlled KVM Switch

Once upon a time, [hardwarecoder] acquired a Gen8 HP microserver that he began to toy around with. It started with ‘trying out’ some visualization before spiraling off the rails and fully setting up FreeBSD with ZFS as a QEMU-KVM virtual machine. While wondering what to do next, he happened to be lamenting how he couldn’t also fit his laptop on his desk, so he built himself a slick, motion-sensing KVM switch to solve his space problem.

At its heart, this device injects DCC code via the I2C pins on his monitors’ VGA cables to swap inputs while a relay ‘replugs’ the keyboard and mouse from the server to the laptop — and vice-versa — at the same time. On the completely custom PCB are a pair of infrared diodes and a receiver that detects Jedi-like hand waves which activate the swap. It’s a little more complex than some methods, but arguably much cooler.

Using an adapter, the pcb plugs into his keyboard, and the monitor data connections and keyboard/mouse output to the laptop and server stream out from there. There is a slight potential issue with cables torquing on the PCB, but with it being so conveniently close, [hardwarecoder] doesn’t need to handle it much.

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High-Effort Streaming Remote for Low-Effort Bingeing

There’s no limit to the amount of work some people will put into avoiding work. For instance, why bother to get up from your YouTube-induced vegetative state to adjust the volume when you can design and build a remote to do it for you?

Loath to interrupt his PC streaming binge sessions, [miroslavus] decided to take matters into his own hands. When a commercially available wireless keyboard proved simultaneously overkill for the job and comically non-ergonomic, he decided to build a custom streaming remote. His recent microswitch encoder is prominently featured and provides scrolling control for volume and menu functions, and dedicated buttons are provided for play controls. The device reconfigures at the click of a switch to support Netflix, which like YouTube is controlled by sending keystrokes to the PC through a matching receiver. It’s a really thoughtful design, and we’re sure the effort [miroslavus] put into this will be well worth the dozens of calories it’ll save in the coming years.

A 3D-printed DIY remote is neat, but don’t forget that printing can also save a dog-chewed remote and win the Repairs You Can Print contest.

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