Here's a series of 1950s-vintage videos illustrating the workings of mechanical Navy ballistics computers -- enormous arrays of switches and gears that are used to quickly and reliably do complex mathematics in response to changing wind, targets and other factors. It's a really good, easy-to-follow guide to the underlying logic in a computer, and it's excitingly mechanical.
Justine Haupt made this handsome and completely functional rotary cellphone. Her design is open-source and you can even buy a case kit from her company, Sky’s Edge Robotics. You have to find and carefully modify your own rotary dial, though — they’re apparently no longer made — as well as a few other components. Why […]
Samsung claims to have developed an “Ultra Thin Glass” for its new Galaxy Z Flip foldable smartphone, signalling scratch resistance and durability beyond that of similar products. But tests conducted by Zack Nelson using a Mohs Hardness Testkit [Amazon] — a set of styluses made of different materials — show that it is no more […]
There is very little evidence that Ring reduces crime. Hundreds of police departments have signed agreements with Amazon-owned Ring to obtain access to the home surveillance camera footage. Interviews with many of them, in 8 different states, show little to no evidence that Ring actually deters criminal activity.
Assembling a truly autonomous smart home is getting closer and closer to reality every day. But for every new smart bulb, thermostat, home security system and appliance we set loose within our walls, there are still probably a half dozen “dumb” items we’d still love to replace. But whether they’re too costly or too big […]
With so many manufacturers out there these days, it’s tough to know who to trust in the ultra-competitive wireless earbuds market. If you’ve never heard of LinearFlux, you may soon. That’s because it’s a company with a stellar pedigree whose co-founders were two of the engineers behind the original success of two audio houses you […]
Two-thirds of American adults drink coffee every day. On average, they’re each drinking about three cups per day, which works out to nearly 400 million cups downed each and every day. We don’t have stats on what percentage of those cups are God awfully bad, but you have to assume with so many ways to […]