Different Differentials & The Pitfalls Of The Easy Swap

April 25, 2017 by 70 Comments

I dig cars, and I do car stuff. I started fairly late in life, though, and I’m only just starting to get into the whole modification thing. Now, as far as automobiles go, you can pretty much do anything you set your mind to – engine swaps, drivetrain conversions, you name it – it’s been done. But such jobs require a high level of fabrication skill, automotive knowledge, and often a fully stocked machine shop to match. Those of us new to the scene tend to start a little bit smaller.

So where does one begin? Well, there’s a huge realm of mods that can be done that are generally referred to as “bolt-ons”. This centers around the idea that the install process of the modification is as simple as following a basic set of instructions to unbolt the old hardware and bolt in the upgraded parts. Those that have tread this ground before me will be chuckling at this point – so rarely is a bolt-on ever just a bolt-on. As follows, the journey of my Mazda’s differential upgrade will bear this out.

The car in question, currently known as the “Junkbox MX-5” until it starts running well enough to earn a real name. It somehow looks passable here, but in person I promise you, it looks awful. Credit: Lewin Day

It all started when I bought the car, back in December 2016. I’d just started writing for Hackaday and my humble Daihatsu had, unbeknownst to me, just breathed its last. I’d recently come to the realisation that I wasn’t getting any younger, and despite being obsessed with cars, I’d never actually owned a sports car or driven one in anger. It was time to change. Continue reading “Different Differentials & The Pitfalls Of The Easy Swap” →

Digital “Crystal” Breathes New Life Into Old Radio

October 15, 2014 by 11 Comments

[Bill Meara] of the Soldersmoke Podcast has a nice old Drake 2B radio, and wanted to use it for the 12 meter amateur band. These old radios normally make switching tuning bands easy — you just swap out one frequency crystal for another and you’re set.

Only [Bill] didn’t have the 21 MHz crystal that he needed. No problem, because he had a junk crystal, a hacksaw, and a modern direct-digital synthesis (DDS) chip sitting around. So he takes the donor crystal, cuts it open, and solders the two wires directly from the DDS to the crystal’s pins. Now he’s got a plug-in replacement digital oscillator that doesn’t require modifying the nice old Drake receiver at all. A sweet little trick.

The video’s a little bit long, but the money shot comes in around 5:00.

Now, one might worry about simply plugging a powered circuit (the DDS) in place of a passive element (the crystal), but it seems to work and the proof of the pudding is in the tasting. We wonder how far this digitally-controlled-analog-receiver idea could be extended.

Spacing Out: Telescopes, Politics, And Spacecraft Design

December 7, 2021 by 9 Comments

Let’s launch into a round-up of stories that are out of this world, as we take a look at what’s happening in the realm of space exploration.

Ten Billion Dollars For A Telescope? Don’t Drop It!

Perhaps the most highly anticipated space mission of the moment is the James Webb Space Telescope, an infra-red telescope that will be placed in an orbit around the Earth-Sun L2 Lagrange point from which it will serve as the successor to the now long-in-the-tooth Hubble telescope. After many years of development the craft has been assembled and shipped to French Guiana for a scheduled Ariane 5 launch on the 22nd of December. We can only imagine what must have gone through the minds of the engineers and technicians working on the telescope when an unplanned release of a clamp band securing it to the launch vehicle adapter sent a vibration throughout the craft. Given the fragility of some of its components this could have jeopardised the mission, however after inspection it was found that no damage had occurred and that space-watchers and astronomers alike can breathe easy.

Continue reading “Spacing Out: Telescopes, Politics, And Spacecraft Design” →

The BASIC Issue With Retro Computers

November 18, 2016 by 91 Comments

If you are interested in how a computer works at the hardware grass-roots level, past all the hardware and software abstractions intended to make them easier to use, you can sometimes find yourself frustrated in your investigations. Desktop and laptop computers are black boxes both physically and figuratively, and microcontrollers have retreated into their packages behind all the built-in peripherals that make them into systems-on-chips.
Continue reading “The BASIC Issue With Retro Computers” →

“Makerspace” Trademark Application Rejected

January 13, 2016 by 24 Comments

The German Patent and Trademark Office has denied the application from UnterhehmerTUM for a trademark on the word “Makerspace”.  It wasn’t likely to be a threat to the community anyway, but now it’s entirely off the table. So Kwartzlab Makerspace, Houston Makerspace, Rochester Makerspace, Anchorage Makerspace, … you can all breathe easy!

To be fair, there was never any danger, just a misunderstanding.  We reported earlier on the trademark application and within a day or so got an official reply in the comments from Phil (“Mr. Mobile”) Handy that they weren’t looking to enforce anything, but were just essentially trying to make sure that nobody else could pull the rug out from under them.  (Thanks [Gentleman Nerd] for pushing them on this.)

The makerspace in question is an open-access offshoot of a business incubator that’s associated with Munich’s Technical University, and it looks like they pumped a couple million Euros into the deal, so there were doubtless layers of bureaucracy that wanted to make sure that their asses were legally covered.

Anyway, the Trademark Office did the right thing, denying the trademark because it wasn’t “unique”, and the makerspace looks awesome.  All’s well that ends well.

via [Make Magazine] (Germany)

Laser Cut Your Own Vinyl Records

August 7, 2015 by 45 Comments

[Amanda Ghassaei] has created an awesome hack for making your own vinyl records using a laser cutter from an MP3 file. Her excellent hack uses a Processing sketch that converts a digital audio file into a vector graphics file, which is then burned onto vinyl using a laser cutter. We saw a demo of this at the FabLab11 conference, and it’s an impressive hack.

One of the best parts of her write up are the details of how she arrived at the appropriate processing settings to get the record sounding as good as possible, but still be cuttable. It’s an object lesson in how you iterate on a project, trying different approaches and settings until you find the one that works. She also decided to take it a few steps further, cutting records on paper and wood for the ultimate eco-friendly record collection.

Audiophiles should avoid this technique though. Due to limitations in the resolution of the laser cutter, [Amanda] ended up having to reduce the bandwidth of the audio signal to 4.5Khz and use a 5-bit sampling depth. That translates to a rather tinny-sounding record. Vinyl record snobs can breathe easy: this isn’t going to replace their beloved white-hot stampers. For the rest of us, there are always records etched into tortillas.

Continue reading “Laser Cut Your Own Vinyl Records” →

Who Will Win The Hackaday Prize? Judging Begins Tonight

October 27, 2014 by 28 Comments

It’s been a long road for each of the five finalists; but after tonight they can breathe easy. The last judging round of the 2014 Hackaday Prize begins at 11:50pm PDT.

Each finalist must finish documenting their project by that time as a cached version of each of the project pages will be sent off to our orbital judges. Joining the panel that judged the semifinal round is [Chris Anderson], CEO of 3D Robotics, founder of DIY Drones, former Editor-in-Chief of Wired, and technology visionary. These nine are charged with deciding who has built a project cool enough to go to space.

In case you’ve forgotten, the final five projects selected by our team of launch judges are:

  • ChipWhisperer, an embedded hardware security research device for hardware penetration testing.
  • Open Source Science Tricorder, a realization of science fiction technology made possible by today’s electronics hardware advances.
  • PortableSDR, is a compact Software Defined Radio module that was originally designed for Ham Radio operators.
  • ramanPi, a 3D printed Raman Spectrometer built around a Raspberry Pi.
  • SatNOGS, a global network of satellite ground stations.

The ultimate results of the judging will be revealed at The Hackaday Prize party we’re holding in Munich during Electronica 2014. We’re also holding an Embedded Hardware Workshop with Moog synths, robots, hacked routers, computer vision, and a name that’s official-sounding enough to convince your boss to give you the day off work. We hope to see you there!