2026-03-02 02:00:45
Fish are popular animals to keep as pets, and for good reason. They’re relatively low maintenance, relaxing to watch, and have a high aesthetic appeal. But for all their upsides, they aren’t quite as companionable as a dog or a cat. Although some fish can do limited walking or flying, these aren’t generally kept as pets and would still need considerable help navigating the terrestrial world. To that end, [Everything is Hacked] built a fish tank that allows his fish to move around on their own. We presume he’s heard the old joke about two fish in a tank. One says, “Do you know how to drive this thing?”
The first prototype of this “fish tank” is actually built on a tracked vehicle with differential steering, on which the fish tank would sit. But after building a basic, driveable machine, the realities of fish ownership set in. The fish with the smallest tank needs is a betta fish, but even that sort of fish needs much more space than would easily fit on a robotics platform. So [Everything is Hacked] set up a complete ecosystem for his new pet, making the passenger vehicle a secondary tank.
The new fish’s name is [Carrot], named after the carrots that [Everything is Hacked] used to test the computer vision system that would track the fish’s movements and use them to control the mobile fish tank. There was some configuration needed to ensure that when this feisty fish swam in circles, the tank didn’t spin around uncontrollably, but eventually he was able to get it working in an “arena” where [Carrot] could drive towards some favorite items he might like to interact with. Mostly, though, he drove his tank to investigate the other fish in the area.
The ultimate goal was for [Everything is Hacked] to take his fish on a walk, though, so he set about training [Carrot] to respond to visual cues and swim towards them. In theory, this would have allowed him to be followed by his fish tank, but a test at a local grocery did not go as smoothly as hoped. Still, it’s an interesting project that pushes the boundaries of pet ownership much like other fish-driving projects we’ve seen.
2026-03-01 23:00:55
For a late-1990s engineer with good soldering skills, many a free pint of beer could be earned by installing modchips on the game consoles of the day. Modchips were usually a small microcontroller connected with a few wires to selected pins on the chips or pads on the board that masked or overrode the copy protection and region locking. This scene was brought back for us by a recent [Modern vintage gamer] video looking at the history of console hardware mods, and it’s worth a watch (see the video, below).
The story starts in 1996 with the original PlayStation, largely the source of those free pints for a nascent Hackaday scribe back in the day. Along the way, as he expands the story, we find other memories, for example, the LPC bus-based hijacks of the first XBox console, and the huge modding scenes on both that machine and Sony’s PS2. The conclusion is that this community left its mark on today’s consoles even though the easy hardware hacks may be a thing of the past on the latest hardware, and as past Hackaday articles can attest, jailbreaking older consoles still has a way to go.
In the early days, our recollection is that the PlayStation modchips were driven by the region locking rather than piracy, for the simple reason that Sony used 80-minute ISOs which wouldn’t fit on the then-available consumer 74-minute CD-R. We also remember them being used by people who couldn’t afford a blue debuugging PlayStation,. or the rare black developer model.
2026-03-01 20:00:54
One of the problems with being a graffiti artist is that you have to carry around a different spray can for each color you intend to use. [Sandesh Manik] decided to solve this problem by building a rig that can produce a wider range of colors by mixing the paint from several cans at once. Check it out in the video below.
The project is called Spectrum. It uses four off-the-shelf spray paint cans—colored red, blue, yellow, and white—and mixes them to create a wider range of colors. All four cans are hooked up to a single output nozzle via a nest of tubing and a four-to-one tube manifold. Key to controlling the flow of paint is a custom device which [Sandesh] calls the “rotary pinch valve,” with one fitted to the feed line coming from each spray can. These valves use a motor-driven lever to pinch a plastic tube shut, allowing them to control the paint flow. This design keeps the mechanism and paint completely separate, which was important to stop paint from fouling the valves in short order. It also prevents backflow, which keeps the paint going towards the outlet and prevents ugly messes. By quickly actuating the valve, the paint flow from each can is modulated to mix various colors as desired.
The mixing valves are under the command of an Arduino Nano. The microcontroller reads a series of knobs to select the amount of each component color to mix, and displays relevant information on a screen. Then, when a pushbutton is pressed, the valves are actuated to spit out the right amount of each paint from the atomizer nozzle. [Sandesh] went so far as to include an advanced “gradient” mode, where a force-sensitive button allows the device to transition smoothly from one color to another depending on how hard the button is pushed.
It’s a neat concept which we’d love to see explored further, perhaps with a more traditional selection of CMYK paints rather than the more unusual red, yellow, blue, and white. We’ve also seen some fun spray paint projects before, like this neat wall-mount plotter. Video after the break.
2026-03-01 17:00:39
Not so long ago, most computer users didn’t own their own machines. Instead, they shared time on mainframes or servers, interacting with this new technology through remote terminals. While the rise of cloud computing and AI might feel like a modern, more dystopian echo of that era, some look back on those early days with genuine fondness. If you agree, check out this 70s-era terminal replica from [David Green].
The inspiration for this build was a Lear Siegler ADM-3A terminal seen at a local computer festival. These machines had no local computing resources and were only connected to their host computer via a serial connection. The new enclosure, modeled on this design, was 3D-printed and then assembled and finished for the classic 70s look. There are a few deviations from a 70s terminal, though: notably, a flat LCD panel and a Raspberry Pi 3, which, despite being a bit limited by today’s standards, still offers orders of magnitude more computing power than the average user in the 70s would have had access to.
On the software side, there are a few modifications to allow the Pi 3 to emulate a CRT-style display. It also runs the i3 windows manager, which was the easiest way to replicate the feel of an old terminal without going command-line-only. With the Pi’s computing power available, though, it’s easier to run emulators for older computer systems, and there’s perhaps no better way to get a sense of how these systems behaved than to use a replica from the era. Another excellent way is to completely reimagine what these computers could have been like in an alternate past.
2026-03-01 14:00:30
There was a time before portable TVs and personal media players when the idea of putting coin-operated TVs everywhere, from restaurants to airports and laundromats, would have seemed like a solid business model. Thus was born the Vend-o-Vision by Mini-TV USA, which presented itself as a cash earner for businesses and a way to make their customers even happier. One of these new-in-box units recently made its way over to [Mark] of the SpaceTime Junction YouTube channel.
This unit is very simple, with what appears to be an off-the-shelf Panasonic black-and-white TV with UHF and VHF reception capability, inside a metal box that contains the timer mechanism, which is linked to the coin mechanism. Depending on a physical slider with three positions, you get anywhere from 10 to 20 minutes per quarter, with the customer having to tune into the station themselves using the TV’s controls. A counter mechanism is provided as an option.
As would be expected from a new-in-box unit, after chiseling off the 30-odd-year-old Styrofoam packaging, it fires right up and works fine. Of course, it’s a small black-and-white TV, so it’s not incredibly useful, and clearly wasn’t even back in 1989 when the Vend-o-Vision first appeared.
After some finagling with adapters, [Mark] gets everyone’s favorite movie playing on the tiny screen, giving us the first glimpse of what it would have been like to gaze at this miracle of technology back around the early 1990s in a noisy laundromat or restaurant. One can hardly imagine why it didn’t catch on.
We can see a patent for this appear in a 1990 scan of the USPTO’s gazette, where it’s listed as being first in commercial operation on the 29th of November 1989. The system was short-lived, however, with in 1995 the FTC settling with the company for deceptive practices, as the company had overinflated the projected earnings per TV when it started flaunting it at tradeshows in 1990. A few years prior, Mini TV USA appears to have already ceased operations, making these remaining Vend-o-Vision quite rare indeed. These types of coin-operated TVs were usually in public places or hotels. But we’ve seen coin-operated TVs that briefly appeared in homes, too.
2026-03-01 11:00:34
At first glance, it may look like [Rybitski]’s 7-segment RGB LED clock is something that’s been done before, but look past the beautiful mounting. It’s not just stylishly framed; the back end is just as attentively executed. It’s got a built-in web UI, MQTT automation, so Home Assistant integration is a snap, and allows remote OTA updates, so software changes don’t require taking the thing down and plugging in a cable.
Pixel Clock is code for the Wemos D1 Mini microcontroller board and WS2812/WS2812B RGB LED strips, but it’s made to be flexible enough to support different implementations. For example, altering which LEDs in the strip belong to which segments on which digits can be configured entirely from the web interface. Naturally, one could build an LED strip clock using the same layout [Rybitski] did and require no changes at all — but it’s very nice to see that different wiring layouts are supported without needing to edit any code. There’s even automatic brightness adjustment if one adds an LDR (light-dependent resistor), which is a nice touch.
[Rybitski]’s enclosure is CNC-routed MDF, framed and given a marble finish. The number segments are capped with laser-cut frosted white acrylic, which serve as both diffuser for the LEDs and an attractive fit with the marble finish at the front. MDF is dense and opaque enough that no additional baffles or louvers are needed between segments.
With this code and an RGB LED strip, you can implement your own 7-segment clock any way you like, focusing on an artful presentation instead of re-inventing the wheel in software. Of course, there’s nothing that says one must use 7-segment numerals; some say your LED clock need not display numbers at all.
