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Showing posts from October, 2013

Nexus 5 - touchless control

Nexus 5 - Google's new smart phone with Touch less technology. One of the best features of Google’s Nexus line of smartphones has been the price, and it looks like the upcoming Nexus 5 could be a better deal than ever. According to an anonymous tipster at Phone Arena, a 16GB version of the phone could start at $299 without any carrier subsidies. This is the same price the Nexus 4 launched at, but consider this: That model only had half the storage, and the time of its launch, its specs weren’t quite top-of-the-line. If the leaks we’ve seen so far are to be believed, on the other hand, the Nexus 5 will be competing amongst the very best new Android phones out there, rather than in the middle of the pack. With a 4.95-inch 1080p display and a Qualcomm Snapdragon 800 processor expected, the Nexus 5 will have the specs to go toe to toe with the likes of the LG G2 and the Galaxy Note 3. Unlike those phones, however, the Nexus 5 could start at half the price. Sure, you can na

Why Capacitors used with D.C Motor?

Dc motor control is very can easily control any dc moto r using L293D chip.But if you look at exact circuit of that motor driver you seen that some capacitors are used.but some times beginners doesn't know the purpose of that capacitors are used with motor driver.Here i'm going to explain what i learnt about dc motor driver from internet. T his must be the case of a DC motor otherwise the capacitor would act as a partial short circuit, (never plug a capacitor into an electrical outlet!). The typical small DC motor consists of coils and brushes and permanent magnets. (Called a PM DC motor.) The current through the coils pushes therm from one magnet to the other and this turns the commutator which switches the current around to continue this process in a cycle. Since you are switching the coils on and off the current drain on the battery jumps up and down. When it is high it will waste energy heating the battery due to internal resistance. The capacitor acts