Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror
Businesses

Amazon Reveals "Prime Air", Their Plans For 30-minute Deliveries By Drone 397

Z80xxc! writes "Amazon CEO Jeff Bezos revealed during a CBS 60 Minutes interview that the company is working on a service called 'Prime Air' to deliver packages by autonomous octocopter drones within 30 minutes of hitting the 'buy' button. The plan still requires more testing and FAA approval, but Bezos predicts it'll be available to the public in the next 4-5 years. With a lot of backlash against drones, and some towns even offering bounties to shoot them down, will this technology ever take off, or is this just another one of Amazon's eccentric CEO's fantastical flight ideas?"

Comment Y Capacitor (Score 1) 383

I have worked for three years for a cellphone charger manufacturer and designed a few battery chargers. Almost all of the chargers are Class II devices. Several the cellphone manufacturers specifically stated in their specifications that the use of the so called Y capacitors was not allowed because some phone models had metal housings. A Y capacitor is a safety capacitor put across the SMPS transformer, between primary and secondary. It is used for EMI reduction. The problem is that it creates a path between the primary side (AC mains) and the secondary side (load, in this case the cellphone), and the resulting leakage current is high enough for the cellphone user to feel an uncomfortable tingle while holding a phone connected to the charger. All notebook power supplies that I have disassembled are Class I devices, and all have Y capacitors. Moreover, they have an electrical connection between the protective earth prong on the AC inlet and the DC ground (-) on the output. In that case, if the AC socket is properly grounded, the leakage current through the Y capacitor is diverted to earth and the user feels no tingle. On the other hand, if the protective earth of the SMPS is disabled or not properly connected, it behaves just like a Class II device equipped with a Y capacitor, and the notebook user will feel the tingle.

Slashdot Top Deals

You have a tendency to feel you are superior to most computers.

Working...