Matt circuit

This is the 4-Channel Selector Stereo Audio Circuit Diagram. This scheme is used for connecting stereo outputs to four different channels of inputs and only one selected for output at any time. 4-Channel Selector Stereo Audio Circuit Diagram When choosing the circuit breaker per channel (AR and AL). If there is no audio on channel A, waits scheme for some time, and then select the next channel (channel B) .The search continues until until it detects a sound in one chenal.The delay between channels or wait can be adjusted using preset VR1. If time is no longer necessary, you can replace the capacitor C1 with a higher value. Jump manually from one channel to another channel active active, simply press the jump switch (S1) to the correct input channel is selected. The selected channel (A, B, C or D), denoted by the corresponding bright LEDs (LED 11, 12, 13 or 14). IC contains 4 analog switches CD4066, these switches are connected to four channels. These analog switches control...

Overview: The TB2903HQ is 4-ch BTL audio amplifier for car audio applications. This IC can generate higher power: POUT MAX = 47 W as it includes the pure complementary P-ch and N-ch DMOS output stage. It is designed to yield low distortion ratio for 4-ch BTL audio power amplifier, built-in standby function, muting function, and various kinds of protectors. Additionally, Off-set detector is built in.  Features  High power output  POUT MAX (1) = 47 W (typ.)  VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω)  Built-in standby switch function (pin 4)  Built-in muting function (pin 22)  Built-in Off-set detection function (pin 25)  Thermal shut down, overvoltage, out to GND, out to VCC, out to out short  Operating supply voltage: VCC (opr) = 9~18 V (RL = 4 Ω)  Circuit Diagam: 47 Watt 4-channel Audio Power Circuit Diagram Datasheet for   TB2903HQ:  Download

TDA7384 - 4 x 22W car power amplifier If connect to car battery where operating voltage is about 13.2V, then each channel can give 22W(4Ω) – what is more than enough for me. This amplifier I probably will use to test audio processor TDA7313 which is stil in development phase. I didn’t find much information about this chip on the internet so I decided to built it and try on my own. As datasheets of TDA7384 says it is low distortion, low output noise, low external component count. Also has Stand-By function and Mute function. It has several protections like from output short circuit to GND or to Vs, capable to handle very inductive loads, thermal limiter, load dump voltage. TDA7384 is an AB power amplifier cased in flexiwatt25 (eagle library is included in project archive) package wich is designed for high end car radio applications. It allows rail to rail output voltage swing with no need of boot-strap capacitors. Schematics TDA7384 I have followed the schematic in datasheed when...

Unipolar 4-Phase Stepper Motor Controller Board will help you control a Stepper Motor or 4 individual Solenoids. This circuit consisting of transistors that serve as current amplifier and also diode to prevent damaging back EMF, circuit uses Darlington transistors to provide high current capacity to unipolar stepper motor. Just provide sequence of pulse using Micro-Controller or descript circuit to roll out the unipolar motor. On board High Watt resistor to control the current, value of the resistor can be set as per your load current requirement. [ ]

Source : - angelfire.com/vt/audio/

  Android 4.4.1 landing soon and fixes Nexus 5 camera . The Nexus 5 from Google is quite an awesome device, however its camera isn’t the greatest. Even though the Nexus 5 ′s camera features a optical image stabilization, taking shots from it are painfully slow and generally out-of-focus. Google is aware of this and as per The Verge, a new update scheduled to be released in the next few days fixes a lot of issues with the Nexus 5 camera. They’ve managed to get a hands-on experience with Android 4.4.1 and here is what they have to say: Speed is a theme for the update, and the Nexus 5 ′s camera really does feel faster across the board. The app launches a full second quicker than it did before the update, meaning you’ll miss many fewer shots than before. There’s also a new progress indicator in HDR+ mode, which makes the process, longer by necessity, feel a lot more straightforward. It’s the first of what Burke says will be a series of interface changes, as Google tries to make Andro...

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. 4 X 15 Watt Mini Power Amplifier 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....

The haute couture world knows no bounds. And sunglasses is one of those accessories that can give you a 'Star' appeal effortlessly. We have earlier told you about the most expensive sunglasses, including the D&G gold sunglasses,the Ultra Goliath $25,000 Diamond Edition sunglasses , Bentley Platinum sunglasses priced at a whopping $45,276, and the gladiator-fight inspired $200k emerald sunglasses designed by Sheils Jewelers, Australia, which smashed records by becoming the priciest in the category. The latest to join the ranks are the Jewel sunglasses by Swiss luxury House Chopard. While exact retail price for the collection continues to remain under wraps, reports claim it as the most expensive in the world, with the speculated price being estimated around $4,084,967 (1.5 million AED). Designed by De Rigo Vision, the glares glare with 51 fully cut River diamonds, their weight totaling at 4 carats. 60 grams of 24 carat gold have been used to create the awe generating piece. ...

Gone are the days when we can afford to luxuriate under a hot shower for hours on end. Well, maybe the showers weren’t quite that long but most people are used to taking showers in the tens of minutes. It’s easy to lose track of time in the shower. And it does feel nice. That’s a luxury that’s no longer economically nor ecologically sustainable. First of all, we’re short of water. In most areas of Australia the powers-that-be keep telling us if we don’t be good boys and girls and cut our water usage then we are going to run out. (Those same powers [read politicians] that keep blaming us wasteful consumers don’t mention that for the most part water shortages are their fault, because they haven’t invested the necessary dollars in water infrastructure while population has steadily increased for much of the last half century. But let’s not get into that argument. At least not right now . . .) Second, we’re short of electric power. The power that goes to heat the water is also in very shor...

There are many rumors about the capabilities and features of the Samsung Galaxy Note 4 , the next super cell phone company that would be presented on September 3 at an event to be held simultaneously in New York, Beijing and Berlin. Now, a new report confirmed that the Galaxy Note 4 would Qualcomm Snapdragon processor 805. Previously, we had seen a few benchmarks on the Samsung Galaxy Note 4 would a version with Exynos 5433 Snapdragon processor and another with 805, or at least be in evidence. Now sources close to him have told asusnto ZDNet Qualcomm would have agreed with Samsung to sell the Galaxy for 805 Snapdragon Note 4 offering a great discount. Although the report does not give more information, it has been rumored that the Samsung Galaxy Note 4 would a new UV sensor and possibly a QHD (2K) screen, but the company has not confirmed anything about it Sourced: Makemoneyfreewithus

As is known, released this year the iPhone and iPhone 6 6 Plus equipped with 4.7-inch and 5.5-inch touch screen, respectively. We now know that next year, Apple may return to the production of more compact devices with display only 4 inches. According to Chinese sources, this model will be released in the second half of 2015 under the name of probable iPhone 6 Mini. The source also said that such a small by modern standards, screen, nevertheless has its advantages and may be popular among some categories of users. Thus, it is convenient to operate with one hand, moreover, such a device could easily approach women and enjoy them more devices with screens of 5 inches. The more so that next year the release of iPhone 5C will stop and be able to replace it iPhone 6 Mini.Pravda until these informal data and can be considered only as a rumor.

4 Channel Infrared (IR) Remote is a simple project using the popular HT12A and HT12D encoder / decoder chips from Holtek. Specifications Supply – Transmitter: 2.4 ~ 5 VDC, 5 V @ 20 mA & Receiver: 5 ~ 6 VDC, 5 V @ 50 mA Output – 4 Latched/Momentary TTL compatible outputs Crystal based oscillator for reliability of operation DIP switch selectable 8 bit address code LED output to indicate reception ON/OFF slide switch in the transmitter Power-On LED indicator in the Receiver / Transmitter High noise immunity Berg connector for interfacing of the board Four mounting holes of 3.2 mm each PCB dimensions – Transmitter: 61 mm x 47 mm & Receiver: 46 mm x 46 mm [ ]