When you want to spead IoT devices around, there is challenge of powering them. You need to provide power to them or be prepared to change batteries in then very now and then. Great things are expected of the Internet of things but only if engineers can solve one potential show-stopper of a question: how →
This is somewhat worrying development as Wired writes that Researchers develop palm-sized device, built for less than $300, that can steal laptop crypto keys using radio waves leaked by its processor. This Radio Bug Can Steal Laptop Crypto Keys, Fits Inside a Pita article tells that the list of paranoia-inducing threats to your computer’s security →
http://mobile.geek.com/latest/257135-this-pita-sandwich-stealthily-steals-wifi-keys-from-laptops?origref= Posted from WordPress for Android →
Crowdfunding campaigns or wide product announcements that do not make sense pops up every now and then. It seems that energy related “inventions” seems to be getting easily into the spotlight without proven merits: Hackaday article Crowdfunding Follies: Proof That Ohm’s Law Is Arcane Knowledge tells about a special cell phone case Kickstarter (Nikola Phone →
http://mobile.geek.com/latest/256951-researchers-develop-camera-powered-via-wifi?origref= Posted from WordPress for Android →
http://spectrum.ieee.org/tech-talk/consumer-electronics/portable-devices/a-tunable-liquid-metal-antenna-increases-the-frequency-range-of-communication-devices- Posted from WordPress for Android →
http://spectrum.ieee.org/tech-talk/transportation/self-driving/cheap-centimeterprecision-gps-for-cars-and-drones Intersting if this can be realized as cheap commercial solution. Posted from WordPress for Android →
http://m.phys.org/news/2015-04-electromagnetism-enable-antennas-chip.html Posted from WordPress for Android →
A network analyzer is an instrument that measures the network parameters of electrical networks. Today, network analyzers commonly measure s–parameters. Full featured network analyzers are expensive instruments, and sometimes a simpler. Scalar Network Analyzer (SNA) is a simpler form of RF network analyzer that only measures the amplitude properties of the device under test. SNA is →
Here is a simple diode detector for RF signals. I can feed RF signal from left and get DC output from right. The DC output can be fed to Arduino analog in. The diode in the circuit is germanium diode for low voltage drop. The circuit works well for fractions of volts to several volts →