TREE

I have built this amplifier and it does sound good. It requires a preamp as it hasn't got much gain. It requires big heat sinks and a large transformer and a great power supply and careful wiring, but in the end it is xtremely simple and it sounds very good. The zener diode rejects any ripple coming from the power supply, But you still only want a ripple of 10mV max. The ripple reaching the input is amplified, so the zener diode gets rid of that, but whatever ripple there is will still reach the power stage.

This design is based on the 18 Watt Audio Amplifier , and was developed mainly to satisfy the requests of correspondents unable to locate the TLE2141C chip. It uses the widespread NE5532 Dual IC but, obviously, its power output will be comprised in the 9.5 - 11.5W range, as the supply rails cannot exceed ±18V. 10 W Audio Amplifier Circuit Diagram As amplifiers of this kind are frequently used to drive small loudspeaker cabinets, the bass frequency range is rather sacrificed. Therefore a bass-boost control was inserted in the feedback loop of the amplifier, in order to overcome this problem without quality losses. The bass lift curve can reach a maximum of +16.4dB @ 50Hz. In any case, even when the bass control is rotated fully counterclockwise, the amplifier frequency response shows a gentle raising curve: +0.8dB @ 400Hz, +4.7dB @ 100Hz and +6dB @ 50Hz (referred to 1KHz). Notes: Can be directly connected to CD players, tuners and tape recorders. Schematic shows left channel only, but C...

Apple will unveil the next edition of the iPhone at a major press event on Sept. 10, according to All Things D.Other than the purported date for the unveiling of the so-called iPhone 6, the site's Ina Fried did not offer any details about what else we might expect from Apple with the arrival of the company's first new smartphone since the debut of the iPhone 5 last September. If Apple does lift the curtain on its next-generation iPhone on Sept. 10, it would be two days short of a full year since the iPhone 5 was revealed. While Apple CEO Tim Cook is rumored to be under pressure from Apple's board to step up the pace of innovation and product release schedules, that lag between new iPhone releases wouldn't be particularly unusual for the company—Apple went 16 months between introducing the iPhone 4 and iPhone 4S , for example. But as Fried noted, even as Apple has continued to enjoy robust sales of the iPhone this year, the company has seen its overall share of the gl...

10,000x With One Transistor circuit Diagram For a collector follower with emitter resistor, you’ll often find that the gain per stage is no more than 10 to 50 times. The gain increases when the emitter resistor is omitted. Unfortunately, the distortion also increases. With a ubiquitous transistor such as the BC547B, the gain of the transistor is roughly equal to 40 times the collector current (Ic), provided the collector current is less than a few milliamps. This value is in theory equal to the expression q/KT, where q is the charge of the electron, K is Boltzmann’s constant and T is the temperature in Kelvin. For simplicity, and assuming room temperature, we round this value to 40. For a single stage amplifier circuit with grounded emitter it holds that the gain Uout /Uin (for AC voltage) is in theory equal to SRc. As we observed before, the slope S is about 40Ic. From this follows that the gain is approximately equal to 40I cRc. What does this mean? In the first instance this leads ...

This is Stereo Amplifier On this schematic amplifier circuit  use the ic AN7145L , but can use the following IC : AN7145M AN7145H AN7146M AN7146H You can use of all ic above. anthis circuit need suply voltage with dual voltage . Minimum voltage 6 Volt and maximum voltage 20 volt . Voltage just (-) and (+), but (-) can also ground. Maximum power output 2 X 20 watt with minimum impedance 4 ohm. Click image to view enlarge. You can operate this circuit with  plugging input to , PC or other media can give signal audio.

Analog to Digital Converter (ADC): In this tutorial i will show how to convert analog values into digital, by using 887 (little bit differ with 877) , then display these digital value on LCD. The Analog-to-Digital Converter (ADC) allows conversion of an analog input signal to a 10-bit binary representation of that signal. This device uses analog inputs, which are multiplexed into a single sample and hold circuit. The output of the sample and hold is connected to the input of the converter. The converter generates a 10-bit binary result via successive approximation and stores the conversion result into the ADC result registers (ADRESL and ADRESH). The ADC voltage reference is software selectable to be either internally generated or externally supplied. ADC Configuration: When configuring and using the ADC the following functions must be considered: • Port configuration • Channel selection • ADC voltage reference selection • ADC conversion clock source • Interrupt control • Results forma...

At the ongoing IFA exhibition in Berlin, Acer introduced a smartphone for gamers Predator 6, reports The Verge. According to company representatives, the smartphone is equipped with ultraproizvoditelnoy filling and corresponds to the aggressive line gaming design Predator. The smartphone is equipped with 10-core processor manufacturing MediaTek and 4 GB of RAM. Surprisingly, the resolution of the display with a diagonal of 6 inches is only 1280 × 720 pixels, which is not in the flagship. Camera Module - 21 Mn. The main body of the device was a place just for the four speakers. The smartphone supports vibration feedback, both gamepad consoles. Acer promises that the smartphone will pull any games that the user installs it. About the price of the device and the date of his entering the market has not reported.

This design is based on the 18 Watt Audio Amplifier , and was developed mainly to satisfy the requests of correspondents unable to locate the TLE2141C chip. It uses the widespread NE5532 Dual IC but, obviously, its power output will be comprised in the 9.5 - 11.5W range, as the supply rails cannot exceed ±18V. 10 W Audio Amplifier Circuit Diagram As amplifiers of this kind are frequently used to drive small loudspeaker cabinets, the bass frequency range is rather sacrificed. Therefore a bass-boost control was inserted in the feedback loop of the amplifier, in order to overcome this problem without quality losses. The bass lift curve can reach a maximum of +16.4dB @ 50Hz. In any case, even when the bass control is rotated fully counterclockwise, the amplifier frequency response shows a gentle raising curve: +0.8dB @ 400Hz, +4.7dB @ 100Hz and +6dB @ 50Hz (referred to 1KHz). Notes: Can be directly connected to CD players, tuners and tape recorders. Schematic shows left channel only, but C...

  Asus will produce the nex Nexus 10 2 (2013 edition) according to new rumours The new Nexus 10 (2013 edition) will be made by Asus, a new screenshot has revealed. The pictures, revealed on Geek.com and presumably from a retailer's stock listing shows the Nexus 10 16GB with the brand listed as Asus, rather than Samsung that manufactured the original Nexus 10. Asus was responsible for making the first and second-generation Nexus 7 tablets and it seems Google was so impressed, it chose the Taiwanese company to make the bigger tablet too.  However, GSMArena says the source is pretty questionable because placeholder numbers are listed in the product's dimensions. Very few specs of the Nexus 10 have leaked thus far, although it's thought the next-generation Nexus 10 will feature a higher-resolution display and will launch on Android 4.3, just like the Nexus 7 2 (2013). There will also probably be a better, higher-powered processor - possibly the same...

This amplifier circuit or with it based on ic KA2210 main amplifier, audio amplifier circuit should disupplay minimum of 10 Volt and up to 16 volts. Power output is 2 x 5.5 W stereo amplifier att. By using this amplifier you can listen to the strains of songs from mp3 player, iPod, etc. This is schematic diagram Part List R1 = 4.7R R2 = 4.7R C1 = 1uF C2 = 100uF C3 = 47uF C4 = 100uF C5 = 0.1uF C6 = 1000uF C7 = 1uF C8 = 100uF C9 = 47uF C10 = 100uF C11 = 0.1uF C12 = 1000uF IC = KA2210