Deltarune’s Tenna Brought To Life

For those who have never played the hit video games Undertale and Deltarune, the games are partially known for their interesting characters, many of which have eerie, surreal, and expressive designs. One of the more memorable characters from Deltarune is Tenna, a game show host of sorts whose distinguishing feature is an old television as a head, as well as a colorful suit. As a result he’s been the subject of a number of recreations by various cosplayers and makers like [BigRig Creates].

This version of the character was actually inspired by a previous build by [BunnyBii] which used an iPad as the interactive screen/face. Inside the television, though, the actual human found this to be front heavy and limiting in the ways that it could be used interactively, especially since the only way to see the outside world in this version was with a small endoscope and screen. [BigRig Creates]’s version builds on this idea but swaps out the iPad for a Raspberry Pi, allowing for much more customization, and uses a pair of Xreal glasses instead of a screen for the view of the outside world from in the television.

To get the whole costume together, the head is 3D printed with all of the electronics inside, and a game controller integrated into a handheld microphone controls the animations shown on the screen. A vibrant, custom-tailored suit with white gloves rounds out the ensemble, along with a pair of 3D-printed shoe covers since actual yellow shoes were a bit pricy. There were some interesting problems to solve along the way, specifically with regards to power management for all the electronics, but in the end it all seems to have come together quite well. [BigRig Creates] is no stranger to builds with unusual displays, though; one of our favorites was the world’s largest Nintendo 3DS.

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It’s Another Pi Handheld. But It’s A Really Good One

Ever since the first Linux capable single-board computers came out, there have been projects turning them into handhelds. The Raspberry Pi Zero and in particular the Compute Modules are ideally suited to this. While there are more common projects that find their way into our feed we’ve certainly seen a few of them in our time, enough now that a new one has to be special to really catch our eye. Which brings us to the PiBrick from [Ahmad Amarullah], which sets the bar pretty high.

The device is a Compute Module 5 smartphone sized computer with a 3.92″ OLED touch display and the ubiquitous BlackBerry-derived keyboard. It’s drawn together with a PCB that holds all components and peripherals, and this and the 5000 mAH battery fit in a 3D printed shell that gives it the form factor of a chunky smartphone. You can see it at the link above, and also find it in a GitHub repository.

Handheld computers always represent something of a compromise as they can only ever offer relatively small screens and keyboards. But they live or die on their versatility and robustness, both of which this one has in spades. We like it, a lot.

Thanks [Nick] for the tip.

Autonomous Submarine Relies On Color Detection

We talk about all kinds of autonomous vehicles here at Hackaday, from aerial drones to rugged rovers. A little less common are the submarine builds, likely due to their technical complexity. That said, though they perhaps benefit most from autonomy given they’re so hard to talk to while underwater. In any case, [Ayman] has built an impressive sub that uses some rudimentary techniques to navigate around while under the surface. 

The build uses typical construction techniques for DIY subs of this size, with a clear acrylic tube serving as the body of the craft. It’s carefully sealed to ensure water ingress doesn’t send it to the bottom, using nifty tricks like a magnetic coupling for the prop. Inside, there’s a Raspberry Pi 4, kitted out with an Arducam IMX708 camera with a wide angle lens. It’s joined by a BNO085 inertial measurement unit, along with two BMP280 pressure sensors for keeping track of motion and the sub’s vital signs, while a DRV8833 motor controller runs the main drive motor.

There’s also an ESP32 which helps out with motor and servo control for steering, and ballast control. Sinking and floating the sub is handled with a pair of two ballast tanks constructed out of 5 mL syringes that are driven in and out with high-torque output gear motors. The build uses an antenna buoy so that communication can be maintained with the sub when it’s within a certain range of the surface.

A neat addition to the sub is its autonomous navigation code. [Ayman] whipped up some simple object avoidance routines, which rely on the Raspberry Pi’s camera. The code uses HSV values to track specific colored objects and avoid them, which proves more reliable than RGB as it allows tracking color in a largely brightness-independent manner.

Although we’ve featured other builds that use similar construction techniques, seeing a transparent submarine gliding through the water will always make us think of the incredible Open Source Underwater Glider that won the 2017 Hackaday Prize.

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Sliding-Screen Cyberdeck Has Chunky, Rugged Design

[Jankbu] needed a new computer, but had little interest in purchasing a modern laptop off the shelf. Instead, it was time to build a cyberdeck with a neat modular design to suit his exact needs.

The heart of the build is a Raspberry Pi 5, which provides a good amount of computing power for regular tasks. It’s wrapped up in a 3D-printed enclosure with rail mounts on the back, along with a NOS 450 TKL mechanical keyboard, offering full-travel keys in a compact layout. The 10.1″ IPS touchscreen display is mounted on sliding rails to cover the keyboard when it’s not needed. A smattering of buttons live around the screen, in a manner akin to so many industrial controllers. On either side, the deck has large grab handles, with one side featuring custom horizontal and vertical scroll controls, while the other rocks a trackball.  Power is via NP-F batteries, which are more commonly used to run Sony camcorders.

Unlike so many cyberdecks, [Jankbu] didn’t just build the device to look cool—it also serves a practical purpose. It’s great for running Freecad, and the rail mounts on the rear make it perfect for mounting around the workshop during a job as needed. Files are on Github for those eager to learn more.

What’s fun about this build is that it’s not just a show piece, it’s something that gets used every day. That’s a testament to [Jankbu’s] well-reasoned design, that considered what the device was for before it was put together. We’ve featured plenty of other fantastic cyberdecks in the past, too. Video after the break.

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Digital Organizer Given Modern Upgrade

Remember digital organizers? They were like the lower-spec version of a PDA that couldn’t really do much more than store a few phone numbers and calendar entries. [TundraLegendZ] recently grabbed such a device from 1995 and set about transforming it into something a little more capable.

The device in question is a Casio Business Organizer Scheduling System SF-5580. The original guts have been replaced , though, with the power of a Raspberry Pi Zero. The single-board computer is hooked up to a small color LCD screen with a resolution of 480 x 800, which is tucked neatly into the spot where the original display lived. There’s also a Raspberry Pi Pico on board, which is charged with interfacing all 82 keys of the original keyboard. Power is courtesy of a 6000 mAh battery which should last a good few hours on a single charge. Hearing the buzzer hacked is fun, too. It’s more mobile phone ringtone than outright chiptune, but we still enjoyed listening to the results. Screencaps of the software show just what this setup can do with better hardware and a nicer screen than 1995 could provide. Future work is planned to give the build more capabilities with a HackRF upgrade.

We’re not convinced anyone ever got much use out of these diminutive digital organizers, but a great many were sold in the 1990s.

A Raspberry Pi-powered glitch camera, with adjustable glitch.

Easy-ish Glitch Camera? There’s A Pi 4 That

Usually, when you want to make glitchy images with lots of colors and things, you have to poke around inside a camera and successfully circuit-bend the thing without bricking it. But [sharkbiscuit101] proves that this isn’t necessary, provided you have a Raspberry Pi 4 and a few other components.

Now we don’t have a lot of detail here, but [sharkbiscuit101] is being heavily encouraged to share the relevant files and a component list. What we do know is that the there’s a screen for previewing images, a portable battery, a shutter button, a rotary encoder to dial in the weirdness, and a game pad for controls. Using the script and a slider, you can tweak different aspects of the image to basically break it down in real time. If you find a nifty combination, you can use the rotary encoder to save and then recall presets.

If you’re wondering about the grip, that’s a Sharge battery from the Bezos Barn. Per [sharkbiscuit101], it is a good size, and since Pi 4 doesn’t have a power button, it can be turned on and off at the battery.

Of course, you can always mess with JPGs on a raw, textual level instead, or produce standard photographs with a pinhole camera.

Network Scanner Finds Every Raspberry Pi

DHCP is great for getting machines on the network with a minimum of fuss. However, it can also make remote administration a pain because you never know which IP you’re supposed to be SSHing into. [Philipp] ran into this problem quite often, so decided to whip up an app to make things easier. 

At it’s heart, the app is a simple network scanner—of which many already exist. However, [Philipp] had found that many options on Android were peppered with ads that made them highly undesirable to use. Thus, he whipped up his own, with a particular eye to working with the Raspberry Pi. It’s not uncommon for a hacker to have a few scattered around the home network, and it can be a real chore keeping track of where they all end up in IP land. The scanner can specifically single out the Raspberry Pi boards on the network via MAC-OUI and mDNS detection. Plus, just in case you need it, [Philipp] threw in some GPIO pinouts and electronics calculators just to make the app more useful.

If you’ve been looking for an open-source network scanner without all the ugly junk, this project might just be for you. You can also check out the source over on Github if that’s relevant to your interests. We’ve seen some interesting custom network scanners before, too. If you’re whipping up some fun packet-flinging software of your own, don’t hesitate to notify the tipsline!