Drill Does Well In Double Duty As Well Drilling Drill

January 19, 2022 by Ryan Flowers 18 Comments

There are a large number of methods commercially used to bore a hole into the ground for the sake of extracting drinking water, and the all require big loud equipment. But what if you just want a small well? Do you really have to call in the big guns? [The Working Group on Development Techniques] is a student association at the University of Twente in the Netherlands who shows in the video below the break that some simple homemade fixtures and a powerful hand drill are quite enough to do the job!

There's more to drilling a drill than drilling with a drill — There’s more to drilling a well than just drilling well

Chief among these fixtures is a swiveling mechanism that serves to hold the drill and its weight, give control over the drill, and inject water into the pipe that the drill bit is attached to. Plans for the swivel are made available on [WOT]’s website. What looks to be a DIY drill bit uses commercially available diamond tips for hardness.

What makes the video remarkable is that it discusses every stage of drilling the bore hole, lining it with casing, and then making it suitable for pumping water from. The video also discusses the chemicals and methods involved in successfully drilling the hole, and gives an overview of the process that also applies to commercially drilled wells.

Naturally you’ll want to make sure your drill is corded so that you can drill for long periods, but also so that it doesn’t grow wings and fly away!

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A Dodgy Dial Gets A Teardown And Some Oil

January 16, 2022 by Jenny List 8 Comments

The pulse-dial telephone and its associated mechanical exchange represents the pinnacle of late-19th and early-20th century electromechanical technology, but its vestiges have disappeared from view with astonishing rapidity. [Matthew Harrold] is a telecoms enthusiast who’s been kind enough to share with us the teardown and refurbishment of that most signature of pulse-dial components, a telephone dial. In this case it’s on a rather unusual instrument, a British GPO outdoor phone that would have been seen in all kinds of industrial and safety installations back in the day and can probably still be found in the wild today if you know where to look.

The teardown soon identifies a dial that runs very slowly and is sorely in need of a clean. There follows a detailed part-by-part dismantling of the dial mechanism, followed by a careful clean, polish, and reassembly. He notes that a previous owner had used grease to lubricate it, probably the reason for its slow operation.

The result is a smoothly running dial and a refurbished phone that would probably last another half-century or more before needing more maintenance. It’s enough to make others who’ve experimented with pulse dial phones very envious.

Hacking Is Hacking

January 15, 2022 by Elliot Williams 5 Comments

Tom Nardi and I had a good laugh this week on the Podcast when he compared the ECU hacks that enabled turning a VW with steering assist into a self-driver to a hack last week that modified a water cooler to fill a particular cup. But it’s actually no joke — some of the very same techniques are used in both efforts, although the outcome of one is life-and-death, and the other is just some spilled ice-cold water.

This reminded me of Travis Goodspeed’s now-classic talk “In Praise of Junk Hacking” from way back in 2016. For background, this was a time when IoT devices and their security were in their relative infancy, and some members of the security community were throwing shade on the dissection of “mere” commercial crap. (Looked back on from today, where every other member of a Botnet is an IP camera, that argument didn’t age well.)

Travis’ response was that hacking on junk lets us focus on the process — the hack itself — rather than getting distracted by the outcome. Emotions run high when a security flaw affects millions of individuals, but when it’s a Tamagotchi or a pocket calculator, well, it doesn’t really matter, so you focus on the actual techniques. And as Travis points out, many of these techniques learned on junk will be useful when it counts. He learned about methods to defeat address-space randomization, for instance, from an old hack on the TI-85 calculator, which garbage-collected the variables that needed to be overwritten.

So I had junk hacking in the back of my mind when I was re-watching Hash Salehi’s great talk on his work reverse engineering smart meters. Funnily enough, he started off his reverse engineering journey eleven years ago with work on a robot vacuum cleaner’s LIDAR module. Junk hacking, for sure, but the same techniques taught him to work on devices that are significantly more serious. And in the craziest of Hackaday synergies, he even hat-tipped Travis’ talk in his video! Hacking is hacking!

Doing The Right Thing The Wrong Way: Dumping STM8 Firmware With 555 Timers

January 15, 2022 by Ryan Flowers 4 Comments

When [Jarrett] decided to enter the 555 Contest that’s just wrapped up, he leaned up on an idea that’s been rattling around in his noggin for a few years: Using 555 timers to trigger a firmware dump on a microcontroller. It’s definitely the wrong tool for the job, but [Jarrett] got it working and documented it nicely at Hackaday.io.

The premise is that by interrupting the power supply to the STM8 microcontroller at just the right time and for just the right duration, it would skip the instruction telling it not to allow its firmware to be read. Time and duration… things the 555 is well known for being capable of. There was a problem, however.

The first problem is that the duration was to be measured in nanoseconds. A garden variety 555 has can only pulse down to about 10 microseconds. The solution? Well, you’ll have to read the excellent project page to find out, but don’t worry- it’s a 555. The second problem? He was using 555’s!

Was [Jarrett] successful? After much fiddling and twiddling, he absolutely was! The old firmware was dumped from the STM8 processor and the new firmware could be flashed with impunity.

This 555 contest has seen some truly epic entries, including but not limited to this 555 based accordion like instrument that this particular author just can’t get enough of!

Rapid-Reload Vacuum Cannon Totally Demolishes Those Veggies

January 14, 2022 by Dave Rowntree 9 Comments

[NightHawkInLight] has been developing his design for a vacuum canon for a while now, so it seems fitting to drop in check out the progress. The idea is pretty straightforward, take a long rigid tube, insert a close fitting piston, magnetically attached to a projectile, and stopper the open end with something easily destroyed. The piston needs to be pulled into the tube with some force, to pull a vacuum against the stopper. The interesting bit happens next, when the piston exits the other end of the tube, with the vacuum at its maximum, there is a sudden inrush of air. Apparently this inrush of supersonic velocity, and the momentum of the mass of air is sufficient to eject the projectile at considerable velocity, smashing through the plug and demolishing the target. So long as the target is of the soft and squishy variety anyway.

It’s an interesting idea, and certainly gives plenty of bang for not many bucks. That big lump of acrylic tubing (presumably used for ease of explanation in the video) looks fairly expensive to buy off the shelf, but we reckon any old pipe would probably work out fine.

We’ve definitely covered our share of DIY projectile weapons, like this air cannon made from PVC pipe parts, and of course there’s this crazy big one, that you should definitely not try at home.

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Game Boy Becomes Super Game Boy With A Pair Of Pis

January 14, 2022 by Bryan Cockfield 13 Comments

For the Nintendo aficionados of the 90s, the Super Game Boy was a must-have cartridge for the Super Nintendo which allowed gamers to play Game Boy games on your TV. Not only did it allow four-color dot-matrix gaming on the big screen, but it let you play those favorite Game Boy titles without spending a fortune on AA batteries. While later handhelds like the PSP or even Nintendo Switch are able to output video directly to TVs without issue, the original Game Boy needed processing help from an SNES or, as [Andy West] shows us, it can also get that help from a modern microcontroller.

Testing the design before installing it in the NES case.

The extra processing power in this case comes from a Raspberry Pi Pico which is small enough to easily fit inside of a donor NES case and also powerful enough to handle the VGA directly. For video data input, the Pico is connected to the video pins on the Game Boy’s main board through a level shifter. The main board is also connected to a second Pico which handles the controller input from an NES controller. Some fancy conversion needed to be done at this point because although the controller layouts are very similar, they are handles by the respective consoles completely differently.

With all of the technical work largely out of the way, [Andy] was able to put the finishing touches on the build. These included making sure the power buttons, status LEDs, and reset button all functioned, and restoring the NES case complete with some custom “Game Guy” graphics to match the original design of the Game Boy. We commend the use of original Game Boy hardware in this build as well, which even made it possible for [Andy] and his wife to play a head-to-head game of Dr. Mario through a link cable with another Game Boy. If you’re looking for a simpler way of playing on original hardware without burning a hole in your wallet buying AA batteries, take a look at this Game Boy restoration which uses a Lithium battery instead.

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Arduino And An OLED Make This Space Invaders Cabinet Tiny

January 12, 2022 by Dan Maloney 15 Comments

For as simple as it appears now, Space Invaders was one machine from the Golden Age of video games that always seemed to have a long line waiting for a chance to lose a couple of quarters. And by way of celebrating the seminal game’s influence, [Nick Cranch] has executed what might just be the world’s smallest Space Invaders replica.

It appears that this started mainly as an exercise in what’s possible with what’s on hand, which included a couple of quite small OLED displays. For the build photos it looks like there’s an Arduino Nano running the show; [Nick] relates that the chosen hardware proved challenging, and that he had to hack the driver library to make it work. Once he got a working game, [Nick] didn’t rest on his laurels. Rather, he went the extra mile and built a miniature cabinet to house everything in.

The video quality below may be poor, but it’s more than enough to see how much work he put into detailing the cabinet. The graphics of the original US release of the game cabinet are accurately represented, right down to the art on the front glass. The cabinet itself is made from 1.5 mm plywood which he cut by hand. It even looks like he recreated the original scheme of cellophane overlays on the monochrome screen to add a little color to the game. Nice touch!

We really appreciate the attention to detail here, with our only quibble being no schematics or code being posted. Hopefully, we’ll see those later, but for now, this looks like a fun project and a nice trip down memory lane. But if you think it’s too small, no worries — we’ve got a much, much bigger version of the game too.

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