Rongge

The iPod story seems to be that of a charmed life. If you haven't taken a look around there are all kinds of devices and accessories that are created in order to use right along with the wildly popular and successful iPod product offered by Apple. In fact, I can't think of a better coup for Apple to have pulled off against the giant PC industry, even Microsoft's new product the Zune is having a great deal of difficulty even catching up to the sales that iPod seems to have no trouble garnering. The success is something that may define explanation but could have a great deal to do with the equally popular accessories and adornments that are made for each and every iPod product. You might be wondering exactly what this has to do with auto sound systems but those are just another of the many great iPod accessories that can be found in the market place of today. Seriously! Even some car manufacturers are having upgrades that include iPod adapters that allow drivers to play music...

This diy sound activated lights circuit turns a lamp ON for a short duration when the dog barks (or a relatively strong sound) giving an impression that the occupants have been alerted. The condenser microphone fitted in a place to monitor sound and generates AC signals, which pass through DC blocking capacitor C1 to the base of transistor BC549 (T1). Transistor T1 along with transistor T2 amplifies the sound signals and provides current pulses from the collector of T2. When sound is produced in front of the condenser mic, triac1 (BT136) fires, activates lights and the bulb (B1) glows for about two minutes.  Sound Activated Lights Circuit Diagram Assemble the sound activated lights circuit on a general purpose PCB (circuit board) and enclose in a plastic cabinet. Power to the sound activated switch circuit can be derived from a 12V, 500mA step-down transformer with rectifier and smoothing capacitor. Solder the triac ensuring sufficient spacing between the pins to avoid short circui...

PCB Transfer:

Here is a stereo tape head preamplifier circuit for your PC sound card that can playback your favourite audio cassette through the PC. Audio signals from this circuit can be di Here is a stereo tape head preamplifier circuit for your PC sound card that can playback your favourite audio cassette through the PC. Audio signals from this circuit can be directly connected to the stereo-input (lineinput) socket of the PC sound card for further processing. The circuit is built around a popular stereo head preamp IC LA3161. Circuit diagram: Stereo Tape Head Preamplifier For Pc Sound Card Circuit Diagram Weak electrical signals from the playback heads are fed to pins 1 and 8 of IC1 via DC decoupling capacitors C1 and C6, respectively. Components between pins 2 and 3 and pins 6 and 7 provide adequate equalisation to the signals for a normal tape playback.  The amplified and equalised signals available at output pins 3 and 6 of IC1 are coupled to the inputs of line amplifier circuit built aro...

When you look at auto sound systems it is important to pay close attention to the speakers on the system you are considering. You will find that there are all kinds of components, pieces, and parts that go along with a proper sound system in the world of today's music systems. You need to pay special attention to every single detail along the way of choosing the system that will meet your needs, your budget, and your lifestyle with the most bells and whistles to spare. Some things that are important to remember about selecting proper speakers is that bigger isn't always better. As a matter of fact, bigger speakers are often quite inferior no matter how that might have been different in the past. As technology improves, better things are coming in much smaller packages. You do not have to have a huge set of amplifiers in order to receive not only good quality but also really big sound. I hope I can honestly say that the days of having to remove the backseat of your car in order ...

The auto sound systems of today are much more involved and complicated than the simple car stereo and speakers of years long past. Today's sound systems have all kinds of bells and whistles that many us could have only imagined during our younger years. In fact, it is quite possible that many of us did imagine these and those imaginings are how they came to be. One thing you need to do before you even begin to put the auto sound system of your dreams together is learn what kinds of components exist, how they work together, and which ones you really think you need as part of your auto sound system and which components you honestly feel you can live without. Life is about compromise and most of us will readily admit that we are quite unlikely to ever use all the bells, whistles, and upgrades that are made available to us within our lifetimes. I don't know about you, but my cell phone has features I've never even gotten around to learning how to use. I know I can use them and...

This is a Relay activated by Sound Circuit Diagram . Generally a circuit has a basic function, but according to our needs can modify or add to a circuit making it more complex. This circuit is a relay activated by sound, which can be used in an alarm system, home automation, robot and even in an Arduino. Undoubtedly this control by sound can be very useful, an example is a light activated by the sound of a knock on the door or a round of applause. The light turns off automatically after a few seconds. An alternative is to use protection against theft - if someone wants to open the door or break something light illuminates, indicating that someone is home. The circuit can work with any voltage 5-12 Vdc, it depends on the voltage of the relay coil. Relay activated by Sound Circuit Diagram

If you are one of the many people around the world who loves the sound quality of watching movies in theaters but hates the hassles (crying babies, people talking, cell phones ringing, etc) of actually going then I hope you are seriously contemplating the value that a home theater or surround sound system could bring to your movie enjoyment.  In fact, a good surround sound system cannot only improve your overall enjoyment of blockbuster hits but also your favorite music and video games as well. Surround sound is far more than a tool for watching movies at home, it is an entirely new way to look at and listen to your television in general.  You do not have to begin your home theater or surround sound experience with a top of the line piece of equipment. It is quite possible to start small with a surround sound system and build a better system as you go. In fact, I seriously recommend that people invest heavily in speakers from the beginning and sacrifice the number of speakers ...

In this article I will discuss my own experiences about designing a USB sound card, which is the USBDAC. DAC is an acronym for Digital-to-Analog Converter because in a sound card, digital data representing the sound is converted into analog voltage that moves the speaker cone. My device is loosely based on the PCM2706 reference design. I will not go through the tecnical details but instead concentrate on my own experiences in the design of the device. This is to keep people not familiar with electronics, as well as newcomers to electronics design, interested. You will see that one working product is the result of many failed prototypes.