Check Your Mailbox Using The AirTag Infrastructure

A small round NRF51822 board glued to the underside of a mailbox lid, with a small vibration sensor attached

When a company creates an infrastructure of devices, we sometimes subvert this infrastructure and use it to solve tricky problems. For example, here’s a question that many a hacker has …read more Continue reading Check Your Mailbox Using The AirTag Infrastructure

Keebin’ with Kristina: the One With the Tri-lingual Typewriter

Illustrated Kristina with an IBM Model M keyboard floating between her hands.

Isn’t it just fantastic when a project finally does what you wanted it to do in the first place? [Simon Merrett] isn’t willing to compromise when it comes to the …read more Continue reading Keebin’ with Kristina: the One With the Tri-lingual Typewriter

Teardown: Orthofix SpinalStim

If you’ve ever had a particularly nasty fracture, your doctor may have prescribed the use of an electronic bone growth stimulator. These wearable devices produce a pulsed electromagnetic field around the bone, which has been shown to speed up the natural healing process in a statistically significant number of patients. …read more

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When A Bike Sharing Startup Goes Away, What Do You Do With The Bikes?

Part of the detritus of many cities over the last few years has been the ubiquitous bicycles and scooters of the various companies that offer them for hourly hire via a smartphone app. They’re annoying when left randomly on pavements by their users, and they sometimes appear to outnumber riders …read more

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Fitness Tracker Hacked Into Optical Density Meter

What do fitness trackers have to do with bacterial cultures in the lab? Absolutely nothing, unless and until someone turns a fitness band into a general-purpose optical densitometer for the lab.

This is one of those stories that shows that you never know from where inspiration is going to come. …read more

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A Cloned Bluetooth Tracker Meets its Maker

The holidays bring us many things. Family and friends are a given, as is the grand meal in which we invariably overindulge. It’s a chance for decades old songs and movies to somehow manage to bubble back up to the surface, and occasionally a little goodwill even slips in here or there. But perhaps above all, the holidays are a time for every retailer to stock themselves to the rafters with stuff. Do you need it? No. Do they want it? No. But it’s there on display anyway, and you’re almost certainly going to buy it.

Which is precisely how …read more

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Germans React to UK’s micro:bit

Getting kids interested in programming is all the rage right now, and the UK is certainly taking pole position with its BBC micro:bit, just recently distributed to every seventh-grader in the land. Germany, proud of its education system and technological prowess, is caught playing catch-up. Until now.

The Calliope Mini (translated here) is essentially a micro:bit clone, but one that has learned from the experience of its spiritual forefather — the connection points are spread around the outside of the board where the crocodile clips won’t accidentally touch each other.

Not content to simply copy, the Calliope also adds additional …read more

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Custom Firmware Unlocks Fitness Tracker

[Mikhail] sent us a teaser video for a hack he’d done (embedded below). He takes a Bluetooth LE fitness tracker dongle and reflashes it spit out the raw accelerometer data and trigger events. He then wrote a phone app that receives the data and uses the device as an alarm, an on/off switch, a data-logging device, and more.

We thought it was cool enough that we asked [Mikhail] for more detail, and he delivered in spades! Inside the device is a Nordic NRF51822, their ARM Cortex + Bluetooth chip, an accelerometer, and a bunch of LEDs. [Mikhail] mapped out the …read more

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