Hackaday Podcast Episode 327: A Ploopy Knob, Rube-Goldberg Book Scanner, Hard Drives And Power Grids Oscillating Out Of Control

It’s Independence Day here in the USA, but if you’re not a fan of fireworks and hot dogs, Elliot and Dan’s rundown of the best hacks of the week is certainly something to celebrate. Rest easy, because nothing exploded, not even the pneumatic standing desk that [Matthias] tore into, nor the electroplated 3D prints that [H3NDRIK] took a blowtorch to. We both really loved the Ploopiest knob you’ve ever seen, which would be even Ploopier in anodized aluminum, as well as an automatic book scanner that takes its job very seriously. We looked into the mysteries of the Smith chart, another couple of fantastic student projects out of Cornell, the pros and cons of service loops, and what happened when the lights went out in Spain last Spring. And what does Janet Jackson have against laptops anyway?

 

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Hackaday Podcast Episode 326: A DIY Pockels Cell, Funny Materials To 3D Print With, And Pwning A Nissan Leaf

Time for another European flavoured Hackaday Podcast this week, as Elliot Williams is joined by Jenny List, two writers sweltering in the humidity of a Central European summer. Both of our fans and air conditioners made enough noise to be picked up on the microphone when they were turned on, so we’re suffering for your entertainment.

The big Hackaday news stories of the week are twofold, firstly a cat-themed set of winners for the 2025 Pet Hacks contest, and then the announcement of a fresh competition: the 2025 Hackaday One Hertz Challenge. Get your once-a-second projects ready!

This week gave us a nice pile of interesting hacks, including some next-level work growing and machining the crystal for a home-made Pockels cell light valve, an upcoming technique for glass 3D prints, and enough vulnerabilities to make any Nissan Leaf owner nervous. We note that mechanical 7-segment displays are an arena showing excellent hacks, and we’re here for it.

Meanwhile among the quick hacks a filament made of PLA with a PETG core caught Elliot’s eye, while Jenny was impressed with a beautifully-made paper tape punch. Finally in the can’t miss section, The latest in Dan Maloney’s Mining and Refining series looks at drilling and blasting. Such an explosive piece should come last, but wait! There’s more! Al Williams gives us a potted history of satellite phones, and explains why you don’t carry an Iridium in your pocket.

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Hackaday Podcast Episode 325: The Laugh Track Machine, DIY USB-C Power Cables, And Plastic Punches

This week, Hackaday’s Elliot Williams and Al Williams caught up after a week-long hiatus. There was a lot to talk about, including clocks, DIY USB cables, and more.

In Hackaday news, the 2025 Pet Hacks Contest is a wrap. Winners will be announced soon, so stay tuned. Meanwhile, how’d you like a free ticket to attend Supercon? Well, free if you submit a talk and get accepted. November is right around the corner, so get those talks ready.

Hackaday is a big fan of the NOAA Polar sats, and it looks like they are on their last figurative legs. The agency has left them up for now, but won’t be keeping them in shape, and if they misbehave, they may be neutralized for safety.

Since Elliot was off, Al supplied the sound, and in a bout of karma, Elliot had to do the guessing this week. How’d he do? Not bad, but there’s room to do better. If you do better, there could be a coveted Hackaday Podcast T-shirt in your future.

Moving on the hacks, the guys were interested in magnets, clocks, cables, 3D printed machine tools, and even old moonbase proposals. For the can’t miss articles, Al took the bifecta, since Elliot picked a piece on the machine that generated laugh tracks in the latter part of the 20th century and Al shamelessly picked his own article about the role of British ham radio operators during WWII.

Miss anything? Check out the links below and catch up. As always, drop a comment and tell us what you think about the week in Hackaday.

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