Showing posts with label sound. Show all posts
Showing posts with label sound. Show all posts
Thursday, September 5, 2013
Sound Operated Switch Circuit
Circuit Diagram
Notes:
Notes:
- This sensitive sound operated switch can be used with a dynamic microphone insert as above, or be used with an electret (ECM) microphone. If an ECM is used then R1 (shown dotted) will need to be included. A suitable value would be between 2.2k and 10kohms.
- The two BC109C transitors form an audio preamp, the gain of which is controlled by the 10k preset. The output is further amplified by a BC182B transistor. To prevent instability the preamp is decoupled with a 100u capacitor and 1k resistor. The audio voltage at the collector of the BC182B is rectified by the two 1N4148 diodes and 4.7u capacitor. This dc voltage will
- directly drive the BC212B transistor and operate the relay and LED.
- It should be noted that this circuit does not "latch". The relay and LED operate momentarily in response to audio peaks.
Monday, April 8, 2013
Pieces Parts Components and Sound
If you are in the market for a surround sound system Im sure you are trying to learn as much as possible about options before you reach the buying stage. One thing to keep in mind is that there are many options and most of them will come down to a matter of taste when all is said and done. There is no right or wrong component or process when it comes to buying a surround sound system only what does and doesnt work for you and the space you have available.
You will find throughout the process that there are many parts, pieces, and components that you may purchase for your surround sound system and even more prices for those individual items. Ultimately the decision comes down to how much of a sound snob you are. Seriously. I must admit that my personal preference is for the most possible sound saturation and the most realistic possible sound as possible. For this reason I am more interested in buying the components as individuals rather than a simple AV receiver. This does not mean that an AV receiver wouldnt be perfectly adequate (especially in relation to the size of my rather small media room) but that I prefer the added control over the sound that individual components provides.
Unfortunately, I cannot tell you which will work best for your situation as your tastes and requirements will also play heavily on which decision is best for you as will your budget. Some people do not place nearly as much emphasis on sound as I do and most people have budget constraints that make individual components seem like a bit of overkill. However, if you spend, as much time as I do submersing yourself in experiences that require sound, then you will find that the investment in these components may be well worth every penny. You will pay a few though and should understand that now.
If you want to build a fabulous surround sound system you will need to start with the preamp or processor. This will be the heart of your sound system and works as a surround processor, AM/FM radio, amplifier, and preamp in one. This piece of equipment receives the signals and then sends them on their merry way. Amazingly enough the information always seems to find its way where it should go-assuming of course that everything is plugged into its proper channel.
The tuner allows you to receive and process AM/FM radio signals, XM or Satellite Radio, and some High Definition signals as well. The amplifier adds power to the sound or as its name implies, amplifies it. This allows the sound to reach across the room so that everyone in the room is touched by it.
These components each achieve functions individually that a good quality AV receiver can accomplish. The difference is always in degrees and depth. The AV receiver allows some of the functionality of each but doesnt quite match the control and nuances that can be achieved with any one of the pieces individually. The average consumer doesnt need that sizeable of an investment in equipment, money, time, or space in order to achieve excellent theater quality sound in their home theater system and that is the important thing to remember.
If you are hoping to imitate a theater experience in an average size room, chances are you will never need anything more than a decent AV receiver and an excellent set of speakers. The more speakers you have in your surround sound system, the better the quality of the sound will be. However, better quality speakers will trump marginal quality equipment any day while marginal quality speakers can still ruin the sound of even the best quality AV equipment. The best advice I can give you when purchasing equipment for your surround sound system is to make sure you put your money in your speakers and sort the rest out afterwards.
PPPPP
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Professional Installation of Auto Sound Systems Imperative
One of the biggest decisions that people need to make when deciding on an auto sound system is the decision of whether or not have the system professionally installed. On the one hand, it will add a pretty hefty fee to the bottom line but you just might find that the fee is well worth the expense youd have to pay to fix any mistakes you might make along the way. The truth of the matter is that installing an auto sound system is not an easy task and requires no small degree of skill and concentration. Im not sure about you but Im in short supply of both when it comes to technical matters such as this and would much rather not risk my car, which will cost a lot more to repair if I make a mistake than the couple of hundred dollars that professional installation might require.
When it comes down to it there are many benefits to having your sound system installed by professionals. Below you will find a few of these benefits.
1) Sound systems are huge investments. Most automobiles come equipped with a marginal sound system at best. Many people will spend hundreds if not thousands of dollars on upgraded materials for sound systems but then skimp on installation. The result is a sound system that is very unlikely to provide the actual quality you paid for. Professionals train for months, even years, in order to learn how to properly place and install each component in order to achieve the best possible sound inside your automobile. If you do not have the training you cannot possibly expect the same results. Protect your investment by making the extra investment of a professional installation.
2) Saving money in costly repairs. This is especially important when installing in dash auto sound systems. You will be pulling out pieces and parts and may even need to make adjustments to the available space in order to get a new sound system to fit in the space allotted for a sound system in your automobile. Professionals not only have the skills to handle these types of adjustments without damaging your dash or automobile but also the tools that might make the difference between making a tiny adjustment and a huge mess. Dont risk the need to pay for factory repairs from your carmaker to fix the mess youve made of your automobile.
3) Sound systems arent cheap. For this reason alone you need to make sure you arent putting your brand new sound system at risk by foolishly attempting the installation for yourself. Even if you purchase the extended warranty on your system you may find that the warranty is void if you did not have a professional installation performed. If you have a professional installation the warranty is generally in tact if problems are found with your equipment during the installation process. In other words, having a professional installation is another layer of security for your investment.
4) Someone else is responsible for goof ups. This is probably the best reason on earth to spend the extra money on a professional installation. If something goes wrong during the process, it is someone elses fault and you do not have yourself to blame. Even better than that, someone else is responsible for fixing the mistake and covering the cost of any damage that may have occurred. This reason is enough for me to add another hundred or so dollars to my investment and take the time to have a professional installation. If something goes wrong on a thousand dollar piece of equipment or a thirty plus thousand dollar automobile, I want someone other than myself to yell at. But hey, thats just me.
Sound systems greatly affect how much we enjoy our time in our cars, trucks, and SUVs it only makes sense to get the best sound system we can afford to improve the quality of the time we spend in our automobiles. Dont ruin the investment by skimping on the installation, it could cost more in the long run than you realize at the time of the purchase.
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