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Last Build Date: Tue, 20 Feb 2018 13:57:51 +0000

 



The Strange Physics of Curlingcurling-feat2adamfabio

Tue, 20 Feb 2018 12:00:00 +0000

It turns out that curling involves some complex physics. [Destin] of Smarter Every Day has jumped in to find out why scientists on opposite sides of the Atlantic disagree about why curling stones curl.

If you’ve been watching the Olympics, you’ve probably seen some curling, the Scottish sport of competitively pushing stones on ice. As the name implies, curling stones don’t go straight. The thrower pushes them with a bit of rotation, and the stones curve in the direction they are rotating. This is exactly the opposite of what one would expect — try it yourself with an inverted drinking …read more


Media Files:
http://hackadaycom.files.wordpress.com/2018/02/curl-cup.png?w=400




Debunking Moon Landing Denial with an Arduino and Sciencelidardpsm64

Tue, 20 Feb 2018 09:00:00 +0000

It’s sad that nearly half a century after the achievements of the Apollo program we’re still arguing with a certain subset of people who insist it never happened. Poring through the historical record looking for evidence that proves the missions couldn’t possibly have occurred has become a sad little cottage industry, and debunking the deniers is a distasteful but necessary ongoing effort.

One particularly desperate denier theory holds that fully spacesuited astronauts could never have exited the tiny hatch of the Lunar Excursion Module (LEM). [AstronomyLive] fought back at this tendentious claim in a clever way — with a DIY …read more


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Invasion of the Tiny Magnetic PCB Visesminivise_feattomnardi

Tue, 20 Feb 2018 06:00:45 +0000

[Proto G] recently wrote in to share a very slick way of keeping tabs on all the tiny PCBs and devices that litter the modern electronics workbench. Rather than a big bulky PCB vise for each little board, he shows how to make tiny grippers with magnetic bases for only a couple bucks each. Combined with a sheet metal plate under an ESD mat, it allows him to securely position multiple PCBs all over his workspace.

The key to this hack is the little standoffs that are usually used to mount signs to walls. These already have a clamping action …read more


Media Files:
http://hackadaycom.files.wordpress.com/2018/02/minivise_detail.jpg




A Jukebox For The 21st-Century Kit Blends Raspberry Pi, Sonos, QR CodesQRcodile QR Code Media Controllerthehacksmith

Tue, 20 Feb 2018 03:01:33 +0000

When [Chris Campbell]’s children wanted to play an album in the background over dinner, switching the outputs on his family’s Sonos sound system was perhaps too involved for their budding mastery of technology. This got him thinking about using kid-friendly inputs so they could explore his music collection. Blending QR codes, some LEGO, and a bit of arts and crafts, a kid-friendly QR code reader media controller comes out!

Working with a Raspberry Pi 3 Model B and a cheap camera, [Campbell] whipped up some code to handle producing and reading the QR codes — though he’s running the media …read more


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Scan Your Film The 3D Printed Way3dp-film-scan-featuredjennylist

Tue, 20 Feb 2018 00:01:58 +0000

Everyone has a box or two at home somewhere full of family photographs and slides from decades past. That holiday with Uncle Joe in Florida perhaps, or an unwelcome reminder of 1987’s Christmas jumper. It’s fair to say that some memories deserve to be left to gather dust, but what about the others in a world of digital images?

You could of course buy a film scanner to digitize Uncle Joe on the beach, but aside from the dubious quality of so many of them where’s the fun in that? Instead, how about 3D printing one? That’s what [Alexander Gee] …read more


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Tiny Guitar Amp Rebuilt with Tiny Tubeshoneytone_feattomnardi

Mon, 19 Feb 2018 21:00:25 +0000

[Blackcorvo] wrote in to tell us how he took a cheap “retro” guitar amplifier and rebuilt it with sub-miniature vacuum tubes. The end result is a tiny portable amplifier that not only looks the part, but sounds it to. He’s helpfully provided wiring schematics, build images, and even a video of the amplifier doing it’s thing.

The original Honeytone amplifier goes for about $26, and while it certainly looks old-school, the internals are anything but. [Blackcorvo] is too much of a gentleman to provide “before” pictures of the internals, but we looked it up and let’s just say it doesn’t …read more


Media Files:
http://hackadaycom.files.wordpress.com/2018/02/honeytone_detail.png?w=400




Handheld GPS Tracks All The Thingshandheld-gps-tracker-featuredthehacksmith

Mon, 19 Feb 2018 19:31:56 +0000

With a GPS on every smartphone, one would be forgiven for forgetting that handheld GPS units still exist. Seeking to keep accurate data on a few upcoming trips, [_Traveler] took on a custom-build that resulted in this GPS data logger.

Keeping tabs on [_Traveler] is a Ublox M8N GPS which is on full-time, logging data every 30 seconds, for up  to 2.5 days. All data is saved to an SD card, with an ESP32 to act as a brain and make downloading the info more accessible via WiFi . While tracking the obvious — like position, speed, and time — …read more


Media Files:
http://hackadaycom.files.wordpress.com/2018/02/handheld-gps-tracker.jpg?w=400