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Introduce Lenovo Debuts 5-Inch Vibe X Smartphone . Lenovo unveiled its new Vibe X, a fairly clear-cut smartphone, at IFA Berlin on Thursday. The 5-inch apparatus arrives with a 1,080p IPS display, a quad-core, 1.5GHz processor, a 13-megapixel camera (coupled with an oddly powerful 5-megapixel one on the front), 2GB of recollection and 16GB of storage. The specs are admirable, but they aren't the best out there. although, add in the premium polycarbonate body — which is just 6.9 millimeters thick and weighs about a quarter of a pound — and Vibe X becomes a solid lightweight competitor in the crowded 5-inch Android arena. On the programs edge, just like most of its new brethren, it sprints Android 4.2. The Vibe X will never reach European or the U.S. coastlines, we've been notified. Price and release designated day are not yet available.

LA4440 This is a very simple circuit power amplifier with IC LA4440. This circuit is a circuit the first time i learned to make a power amplifier. Power output 2 X 20 Watt with stereo speakers. Minimum Voltage 9 Volt and maximum voltage 24 V. The Circuit is also very easy to make. For novices , this circuit is suitable for use . The material is also readily available at electronics store.  See schematic below : The Speaker are matched with woofer speaker with impedance 4 Ohms. And voltage can be stabilized with IC 7812 but must be reinforced such us transistor.

A lot of electronic circuits in the domain of audio amplifiers are already been published here. This circuit is a little different because it is a four channel amplifier. Each channel of this amplifier can deliver an output of 15Watts into a 4 ohm speaker. The amplifier can be operated from a single 12V DC supply and this makes it possible to use this amplifier in car audio applications too. Circuit diagram : 4 X 15 Watt Mini Power Amplifier The circuit is based on the 15W BTL X 2 channel audio power amplifier IC TA8215 from Toshiba. Even though chip is specifically designed for car audio applications it can be also used for home audio applications. Two TA8215 ICs are used here in order to obtain a 4 channel amplifier system. The circuit is designed almost exactly as per the application diagram in the ICs datasheet. Pins 7 and 19 are the Vcc pins of the ICs internal integrated power amplifier stages and these pins are connected to the positive supply. Pin 9 is the Vcc pin for ICs ...

Minimum Voltage required for this circuit  8 volt and maximum voltage 28 volt . Its can use to amplifier on the electronic devices such us Radio , DVD , MP4 , MP5 , and etc. To amplify the signal sound to audio sound , Maximum output power 2 x 20 Watts with impedance 4 ohm. The circuit is stereo amplifier. You can use the circuit to car amplifier because support to subwoofer speaker. See schematic diagram below :

This is Low power amplifier , based on IC TDA2824 product of Philips. Maximum output is about 2 X 1,8 Watt , these include low  output amplifier type. Minimum required voltage 3 Volts and maximum voltage of 18 volts DC. Specification : Supply Voltage : 3 - 18 Volts Power Output   : 2 x 1,3 Watts RL impedance  : 4 Ohms Frequency responses : 30Hz -18kHz Quiescent current : 6 mA