Smartbolts have little discs in their heads that change color as the right amount of tension is applied to them. I recently installed a child safety gate with a similar mechanism: a red, spongy washer between the bolt and the frame; once the right amount of tension was on the bolt, the washer was squished down so much it disappeared and you could stop tightening.
Unfortunately, a torque-wrench does not measure bolt tension accurately, usually only about +/- 30%, because it does not take friction into account. The friction depends on bolt, nut, washer-material, plating, surface smoothness, machining accuracy, degree of lubrication and the number of times a bolt has been tightened. Fastener manufacturers often provide information for determining torque requirements for tightening various bolts, accounting for friction and other effects. However, in field applications, this information is often not available, practical or administered poorly.
Super Retro-Boy is a compact, minimal reimplementation of Nintendo’s classic Game Boy with the look as well as the tech. It plays real cartidges, including those from the full-color Game Boy Advance—presumably this is why there are four buttons. It gets 10 hours on a charge, and will come with a 10-in-1 game from Retro-Bit […]
A T-Mobile customer in Florida drove her SUV into the store, smashing through the front window and coming to a stop deep in the showroom. Then she emerged from her disabled vehicle, hefted a broken window frame, and smashed a display. “What is wrong with her?” calls out an unseen observer. According to witnesses who […]
Slovenia’s Maheno corporation manufactured a series of Barbie-branded and white label typewriters for kids, with a hidden feature that allowed their owners to use them to produce messages encrypted with a simple substitution cipher.
Traditional folding wallets are designed for paper bills—but these days, carrying cash is rarely a necessity. More often than not, I don’t carry cash at all. This Bogui Clik Wallet is the best answer I’ve found for avoiding the hassle of those tight-fitting credit card pockets.This attractive, minimalist wallet features a protective lip, so my cards don’t […]
Using my iPhone while it’s charging is always a hassle. With tucked-away outlets and the meager length of included lightning cables, comfortable scrolling while plugged in is annoying. These 10-Ft MFi-Certified Lightning Cables are super convenient and probably the best iPhone accessory purchase I’ve made.At over three times the length of normal cables, these reach anywhere you […]
With countless applications for modern life, artificial intelligence (AI) is one of the most in-demand fields of study in tech. Beyond modelling human decision making processes and learning abilities, AI can be used to analyze massive volumes of data and create complex interactive systems.This Machine Learning & AI for Business Bundle made mastering these concepts possible for […]