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This excellent content from the Hackaday writing crew highlights recurring topics and popular series like Linux-Fu, 3D-Printering, Hackaday Links, This Week in Security, Inputs of Interest, Profiles in Science, Retrotechtacular, Ask Hackaday, Teardowns, Reviews, and many more.

Hackaday Podcast 195: No NABU For You, Self-Assembling 3D Prints, Black Hats Look At EV Chargers

December 2, 2022 by 4 Comments

This week, Editor-in-Chief Elliot Williams and Managing Editor Tom Nardi find themselves in the middle of a slow news week, so they dispense with the usual timely chit-chat and dive right into the results of a particularly tricky “What’s that Sound” challenge.

From there they’ll cover the new breed of ATtiny microcontollers (and why you probably won’t be buying them), a recently unearthed Z-80 consumer gadget that’s begging to be reverse engineered, the fine art of electrifying watercraft, and a particularly impressive speech recognition engine. Stick around till the end to hear about the potential dangers of unsecured EV chargers, and take a walk down memory lane to a time when soldering irons and paper schematics ruled the world.

Check out the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

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Car Batteries: More Than Just Wet Lead

December 1, 2022 by 47 Comments

Working on car electrical systems used to be easy. The battery simply provided power for the car’s starter motor when starting or to run the small number of accessories when the engine wasn’t running. The rest of the time, the alternator charged the battery and provided power for the rest of the vehicle and the ignition system. While very early cars didn’t have batteries, and some old cars had 6 V positive ground systems, most of us have lived our entire lives where car batteries come in several sizes (controlled by Battery Council International) and cars have a 12 V, negative ground system.

Times have changed. Cars don’t have distributors anymore, they have computers. They also have lots of gadgets from GPS to backup cameras and cellphone chargers. Batteries have had to get beefier and the modern trend is to also require less maintenance So, today, you’ll find that there isn’t just one kind of car battery. But how do these other batteries work and what was wrong with the good old lead acid wet cell?

For the purposes of this post, I’m not talking about electric car batteries which is a whole different topic — and most of them have a regular car battery, too. Continue reading “Car Batteries: More Than Just Wet Lead” →

JCB Is Exploring Hydrogen Combustion Engines For Construction Machinery

November 30, 2022 by 60 Comments

When we think about greening up the planet, solar panels and electric cars are often at the forefront of our mind. However, there’s a whole bunch of other things out there that are spewing out carbon dioxide that also need to be cleaned up. That includes leaf blowers, lawn mowers, and yes – big equipment for construction and agricultural work!

JCB manufactures diesel engines for big machines, but is now looking to switch things up for a cleaner future. To that end, the company is working on hydrogen-burning engines for its big machines.

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Weird Energy Storage Solutions Could Help The Grid Go Renewable

November 29, 2022 by 122 Comments

We’re all familiar with batteries. Whether we’re talking about disposable AAs in the TV remote, or giant facilities full of rechargeable cells to store power for the grid, they’re a part of our daily lives and well understood.

However, new technologies for storing energy are on the horizon for grid storage purposes, and they’re very different from the regular batteries we’re used to. These technologies are key to making the most out of renewable energy sources like solar and wind power that aren’t available all the time. Let’s take a look at some of these ideas, and how they radically change what we think of as a “battery.”

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App Detects Parkinsons Disease And COVID-19 Via Audio

November 28, 2022 by 20 Comments

One of the challenges of diagnosing diseases is identifying them early. At this stage, signs may be vague or confusing, or difficult to identify. Early diagnosis is often tied to the best possible treatment outcomes, so there’s plenty of incentives to improve methods in this way.

A new voice-based method of diagnosing disease could prove fruitful in this regard. It relies on machine learning techniques to detect when patients may be suffering from certain conditions.

Continue reading “App Detects Parkinsons Disease And COVID-19 Via Audio” →

Amateur Rocketry Hack Chat

November 28, 2022 by 12 Comments

Join us on Wednesday, November 30 at noon Pacific for the Amateur Rocketry Hack Chat with Kip Daugirdas!

This might be going out on a limb, but it seems like most of us probably fooled around with model rockets when we were younger. Those fantastic Estes kits were great fun to put together, and launching them was always a big neighborhood event, and one of the few that could make even the coolest of the cool kids pay attention to the nerds, if only for a little while. Launch day had it all — a slight element of danger, the rotten egg stink of spent propellant, a rocket gently floating back to Earth from a dizzying height of 100 meters, and the inevitable tree-climbing party to retrieve a lost rocket.

join-hack-chatBut while model rocketry is fun, it doesn’t scale up very well. If you want to reach the edge of space, you’re going to need to make the leap across the border to amateur rocketry. That’s where the big kids play, with real engineering needed to produce and control the forces required to reach altitudes of 100 km or more. Kip Daugirdas has made that leap, building rockets capable of almost getting to the Kármán line. It’s not easy — there was plenty of design work, static engine testing, and loads of test flights leading up to it, and surely more to come. Kip will stop by the Hack Chat to help us understand what’s needed to press the edge of space, and hopefully share his plans for going all the way.

Our Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, November 30 at 12:00 PM Pacific time. If time zones have you tied up, we have a handy time zone converter.

Hackaday Podcast 194: FPV Contest, Seven Words, Lots Of Coffee, And Edible Drones

November 25, 2022 by 4 Comments

This week, Editor-in-Chief Elliot Williams and Assignments Editor Kristina Panos fumbled through setting up Mumble on Kristina’s new-ish computer box before hitting record and talking turkey. First off, we’ve got a fresh new contest going on, and this time it’s all about the FPVs. Then we see if Kristina can stump Elliot once again with a sound from her vast trove of ancient technologies.

Then there’s much ado about coffee roasters of all stripes, and you know we’re both coffee enthusiasts. We have many words to say about the subject, but none of them are any of the 7+ dirty ones that the FCC would probably rather we didn’t. Finally, we take a look at a bike frame that’s totally nuts, a clock that seemingly works via magic, and a drone made of rice cakes. So find something to nibble on, and check out this week’s episode!

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Check out the links below if you want to follow along, and as always, tell us what you think about this episode in the comments!

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