[ad_1] The longest total lunar eclipse of the 21st century – lasting one hour and 43 minutes – will be visible across wide swathes of the world, including Europe, Asia, Australia, Africa, South America and the Middle East. The total phase of the Earth’s natural satellite will turn a spectacular red or ruddy-brown color. FromRead more about Longest lunar eclipse this century coming up in late July – an annotated infographic[…]

[ad_1] When connected in series to the main power rail, it protects the load against over-current and over-voltage. Voltage is clamped to a user-defined maximum, preset with external resistors. Excessive current is restricted to the programmed safe limit by controlling the internal power mosfet, and folds-back to a lower limit if a heavy over-current orRead more about Electronic fuse covers 8-48V and up to 4A[…]

[ad_1] If you want to shoot ultra-close-up images, you need a macro lens. There are various ways to shoot extreme close-ups, including the use of hollow extension tubes, reversing rings or close-up ‘filters’ that screw into to the accessory attachment thread of regular lenses. However, the main advantage of any ‘system’ camera is that youRead more about Best macro lens[…]

[ad_1] This involves flying twice as high as a commercial airliner’s typical cruising altitude, according to the Swiss company, and they have just signed up SunPower as the exclusive solar cell provider for its aircraft. Apparently, the prototype is the first solar-powered airplane to have reached a height of 25,000 meters. And it’s 100% solar-powered, soRead more about SolarStratos plane aims for the stratosphere[…]

[ad_1] One criteria that Google requires phone and tablet manufacturers to comply with if they want access to the internet giant’s Play Store on their Android devices is that Google Chrome and Google Search need to be preinstalled on the device. And European antitrust regulators are none too happy with that. According to Margrethe Vestager,Read more about The EU may force Google to make significant changes to Android[…]

[ad_1] From Waseda, Osaka and Shizuoka Universities, the team has turned to a novel arrangement silicon nano-wires. “Due to advantages such as its relatively low thermal conductance but high electric conductance, silicon nano-wires have emerged as a promising thermo-electric material,” said Waseda University. Silicon-based thermoelectric generators conventionally, according to Waseda, employ long (10-100μm) silicon nanowiresRead more about Thermoelectric generator powers IoT sensors on only 5ºC from body heat[…]