A (Nearly All) New Commodore 64

The Commodore 64 remains one of the most influential of the 8-bit home computers four decades after its launch, so not surprisingly there is a huge enthusiast community surrounding it. With so many produced over the years it was available one might think that there would be no shortage of surviving specimens, but sadly time and component failure have taken their toll and the classic micro is not always the most reliable kid on the block. Thus a cottage industry has sprung up supplying C64 parts, leading [The Retro Shack] to have a go at making a new one entirely from scratch.

As you can see in the video below the break it’s not quite an entirely new ’64, as parts including some of the custom silicon come from failed boards. The PCB is a modern recreation of the original and the SID sound chip is an ARMsid though, and most of the parts come from a handy bagged-up kit that makes assembling the BoM much easier. Instead of the big silver box of the original RF modulator is a modern composite board, and there are a few issues with minor connector part differences.

Assembly is simply a very long through-hole soldering process, and once he’d completed it there was the expected refusal to work. We’ve all been there, and eventually he traced it to an incorrectly fitted chip. If you think you’ve seen a few brand new C64s here before you’d be correct, one of them even used LEGO for those elusive keycaps.

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Inside An 11 Ton Clock With 1,000 Pieces

We aren’t ashamed to admit it, but we like clocks. We’ve built quite a few and clock projects show up regularly in the pages of Hackaday. But there is one clock that is among the most famous in the world: Britain’s Big Ben. It has been getting some repairs and the BBC was nice enough to make a video of the giant mechanism.

Actually, the clock is not called Big Ben. That’s the name of one of the five bells in the Elizabeth Tower since 2012. Before that it was the Clock Tower, but everyone always calls it Big Ben. The giant clock weighs over 11 tons and has more than 1,000 pieces. Hard to imagine what it took to build such a thing in 1859.

Big Ben itself — the bell — weighs even more than the clock at over 15 short tons. But, of course, we are mostly interested in the clock itself. The design was apparently from a lawyer and an astronomer, both of whom liked clocks. Construction, however, fell to a professional clockmaker and — after his death — his stepson. Dennison, the lawyer, developed a superior gravity escapement that quickly became the standard for future tower clocks and was hailed as one of the great horological inventions of the 19th century.

The clock now has an electric motor that it can use as a backup. However, it is normally hand-wound three times a week. Winding the clock takes about 90 minutes. Adjusting the clock is also an interesting event. On top of the pendulum is a stack of penny coins. Adding a penny makes the clock run a little faster, removing one slows it down. Each penny is worth about 0.2 seconds/day.

It is great to see such a recognizable piece of 19th century tech get its 15 minutes of fame. Not that the tower isn’t famous, but very few people know what’s inside. The old clock is full of odd stories. The original bell broke when Dennison wanted to test it with a bigger hammer. The new bell made from the old metal also has a crack in it, but still is operational.

You probably aren’t going to reproduce this clock, but you can make something that works on the same principle. Or, try something a bit more steam-punk.

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Magpies Help Each Other Escape Tracking Devices With This One Weird Trick

Scientists who work with animals love to track their movements. This can provide interesting insights on everything from mating behaviour, food sources, and even the way animals behave socially – or anti-socially, as the case may be.

This is normally achieved with the use of tracking devices, affixed to an animal so that it can be observed remotely while going about its normal business. However, Australian scientists have recently run into some issues in this area, as the very animals they try to track have been removing these very devices, revealing some thought-provoking behaviour in the process.

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Hackaday Podcast 162: Hackaday Prize Is On, Thermal Printers Are So Hot These Days, Cloud Chambers Are Super Cool, And Batteries Must Be Replaceable

Join Hackaday Editor-in-Chief Elliot Williams and Managing Editor Tom Nardi for your weekly review of the best projects, hacks, and bits of news that we can cram into 45 minutes or so. We’ll look at the latest developments in DIY air-powered engines, discuss the whimsical combination of GitHub’s API and a cheap thermal printer, and marvel at impressive pieces of homebrew biology equipment. We’ve also got an exceptionally polished folding cyberdeck, a bevy of high-tech cloud chambers, and some soda bottles that are more than meets the eye. Finally we’ll go over the pros and cons of today’s super-smart cameras, and speculate wildly about what a new EU law means for our battery powered gadgets.

Take a look at the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

Direct download, and listen whenever you like.

 

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Used Facemasks Turned Into Rapid Antigen Tests With Injection Molding

Here’s a little eye-opener for you: next time you’re taking a walk, cast your eyes to the ground for a bit and see how far you can go without spotting a carelessly discarded face mask. In our experience, it’s no more than a block or two, especially if you live near a school. Masks and other disposal artifacts of the COVID-19 pandemic have turned into a menace, and uncounted billions of the things will be clogging up landfills, waterways, and byways for decades to come.

Unless they can be recycled into something useful, of course, like the plastic cases used for rapid antigen tests. This comes to us by way of [Ric Real] from the Design and Manufacturing Futures lab at the University of Bristol in the UK. If any of this sounds or looks familiar, refer back to October when the same team presented a method for turning old masks into 3D printer filament. The current work is an extension of that, but feeds the polypropylene pellets recovered from the old masks into a desktop injection molding machine.

The injection molding machine is fitted with 3D-printed molds for the shells of lateral flow devices (LFD) used for COVID-19 rapid antigen testing. The mold tooling was designed in Fusion 360 and printed on an Elegoo Mars MSLA printer using a high-strength, temperature-resistant resin. The molds stood up to the manual injection molding process pretty well, making good-quality parts in the familiar blue and white colors of the starting material. It’s obviously a proof of concept, but it’s good to see someone putting some thought into what we can do with the megatonnes of plastic waste generated by the pandemic response.

Brick And Motor Table Saw Delivers Paper Cuts On Demand

Twenty Two Motors. Fifty gears. Eighty Two Hundred RPM. Hundreds of individual pieces, and one sheet of glossy paper cut into a disk. This isn’t a nightmare driven Rube Goldberg machine. Instead, it’s a Lego monstrosity created by [GazR] of [GazR’s Extreme Brick Machines!], and all of these parts are flying in formation for one Lego slicing purpose. In the video below the break, you can see what very well may be the worlds most powerful Lego and Paper table saw.

Starting out with a build that had a mere fourteen motors in a platform that looked quite a lot more like a table saw, [GazR] learned that having only fourteen motors turning a Lego based blade was not a good combination. In the next iteration, the same number of motors were used, but the gearing was increased to bring RPM up, and a Lego toy saw blade took care of cutting duties.

Seeing that higher speeds with thinner blades was a winning trend, [GazR] stepped it up to the aforementioned 8200 RPM twenty-two motored paper whirling Lego Death Machine. Yes, [GazR] cut Lego, carrots, carpet, and paper- all with circular sheet of paper.

Do Lego mechanisms turn your gears? You might enjoy this Legopunk Orrery from the Hackaday archives, too. Thanks to [Keith] for the great tip. Be sure to submit your own tips via the Hackaday Tips Line, or the #Submit-A-Tip channel in the Hackaday Discord server.

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How Big Is The Moon? Figure It Out Yourself

We have to confess that we occasionally send friends a link to “let me Google that for you” when they ask us something that they could have easily found online. Naturally, if someone asked us how big the moon is, we’d ask Google or another search engine. But not [Prof Matt Strassler]. He’d tell you to figure it out yourself and he would then show you how to do it.

This isn’t a new question. People have been wondering about the moon since the dawn of human civilization. The ancient Greeks not only asked the question, but they worked out a pretty good answer. They knew approximately how big the Earth was and they knew the moon was far away because it is seen over a very wide area. They also knew the sun was even further away because the moon sometimes blocks the sun’s light in an eclipse. Using complex geometry and proto-trigonometry they were able to work out an approximate size of the moon. [Matt’s] method is similar but easier and relies on the moon occluding distant stars and planets.

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