Showing posts with label systems. Show all posts
Showing posts with label systems. Show all posts

Thursday, 20 November 2014

Auto Sound Systems are Becoming Entertainment Systems

If youve been shopping lately for an auto sound system then I am fairly certain that youve come across several full entertainment systems among those in the running for your audio and entertainment dollars. Vehicles today offer everything from DVD players, individual speakers, headphones (also individually adjustable), and even dual players that will allow one different audio to be played in one section of the vehicle than another. In addition to all of these wonderful and nifty devices are many more devices that are meant to tempt, sway, and convince you to spend even more money on the auto sound system of your dreams. Some of these even offer MP3 players that connect directly to the audio system of your car, truck, or SUV.

The jury is still out for many people about the safety and sense of having a DVD player in your automobile. While this is the case, people will continue purchasing DVD players are part and parcel of their sound and entertainment systems and manufacturers will continue putting together attractive packages that offer these devices to consumers while offering incredible bargains on installation. I know that many feel that this is an unnecessary distraction to drivers. Im one of the rare people that feels that in a day of laptops, cell phones, talk radio, fast food, Starbucks coffee, and multitasking, a DVD in the back might be one of the best features that can be added to the car in an effort to minimize distractions coming from the direction of disgruntled passengers in the rear.

I will confess that many people wonder what this has to do with an auto sound system and I can understand that question so please bare with me. One of the features that sound system manufacturers are offering is a feature that allows individual headphones for passengers in the back along with LCD monitors that rest in the back of the head rests so that passengers in the back can both see and hear the DVDs being played without causing a distraction for the driver (either by noise or by means of flashing lights).

The truth of the matter is that having the noise from a DVD player in the back is no worse of a distraction than having disgruntled children competing for your attention from the backseat or listening to audio books as you drive along. I must admit that audio books are one of my current and readily admitted addictions. The problem with those is that on occasion some of the books simply arent meant for young ears. I try to keep my books limited to popular stories that are suitable for children whenever my children are riding along and save the sometimes steamy and often hilarious tales of Stephanie Plum for when Im riding alone. Another great reason to make sure you have an auto sound system that at the very least reads and understands MP3s.

The technology exists for this and I expect to see even more innovations technologically speaking in the way of auto sound systems and entertainment systems in the near and not so near future. We live in a world where technology is constantly evolving and we should see many new and wonderful features that will make our lives much more enjoyable for our daily commute.

Whether you are new to the technology of today, fighting it mightily, or happily embracing it-it isnt showing any signs of stopping or slowing down. This means that you will eventually have to face the fact that the old ways of buying an auto sound system will soon be obsolete. I often joke that we are rapidly becoming a society that is catching up with the "Jetsons" vision for the future. I also loudly lament my lack of a Rosie. At any rate, I am glad to see that the new technologies in auto sound systems are offering less of a one size fits all image and offering much more individual systems, even for passengers within a vehicle.

Tuesday, 28 October 2014

Stereo to surround sound systems


Circuit quad amplifier or stereo to surround sound systems using the ic tda7375 to power of 7 watts per channel amplifier version quad or dual 15-watt version (stereo). reaching up to 35 watts in mono version.

stereo

The TDA7375 is an integrated circuit quad amplifier class AB audio amplifier capable of working in double bridge or quad amplifiers simple integrated circuit protection system for short, requires minimal external components, available in packages multiwatt 15H (TDA7375H) and multiwatt 15V (TDA7375V). While the first design was for automotive applications, you can use it in a variety of low power applications. This integrated circuit is in an ideal situation where one wishes a reasonable power and a relatively low supply voltage for its operation. This circuit drawn below uses the basic configuration of amplifier quad configuration but using a bridge (Bridge), can be about 4 times the maximum power. In this configuration quad amplifier can be used as an amplifier end of surround sound systems when seven watts per channel has a good power using a minimum of components.

stereo

Operation of the circuit of the audio amplifier with tda7375
The capacitor C8 decouples the internal voltage divider. Capacitors C5 and C6 are the filter to the power supply. The capacitors 2200?F / 16V are output capacitors. Vs is the power supply can be a car battery or a source of 14 volts.

As suggested pleo friend Ronaldo, now this circuit is dynamic, with at least three variations of assembly, and Quad mount, bridge or stereo system 2.1 Stereo + Subwoofer bridge. Suffice it to set a jumper on the card and switch between P (bridge) and N (normal).

An ideal application is in conjunction of 2.1 systems subwoofer filter posted by Buddy A. Junior, which is used as channel 1 and 2 channel stereo and 2 and 3 in bridge mode to Subwwofer. In bridge mode the output capacitors should be omitted.
Anyway you will find the best application for the circuit
Circuit diagram of amplifier with tda7375 – now dynamic

It can be 12V/30VA with a transformer, a bridge rectifier and an electrolytic capacitor or 4700?F (highest). The maximum current consumption with loads of 4ohms is 2.1 A. You can use loads of 2 ohms, but remember also to increase the size of the heatsink, because the integrated circuit package multiwatt will heat a little more. The fuse circuit to be 2A to loads 4 ohms. The maximum voltage is to tda 18 volts, then the working voltage of the electrolytic capacitors is 35 volts. Recommend a source of 15 volts / 2 amps.
Suggested printed circuit board side of the copper

When assembling the circuit remember that this quad amplifier channels features two four inverted, then you should connect the speakers with the polarity reversed on these outputs, the polarity of electrolytic capacitors which must be of good quality. Block diagram of TDA7375 for more information see datasheet pdf of the integrated circuit TDA7375.