Ray's Radio ShackBest finds in sound

digital coaxial audio cable to stereo jack?

possible?
how can i make a homemade converter?

Possible, yes. You can get commercially manufactured DAC units. If you need them to decode Dolby Digital, you need to pay more.

Something you can build, likely not.

The chip you need is likely not to easy to get, plus will be surface mount, so will be a somewhat advanced project. Forget about Dolby. Chips for those are only available to those that have paid for Dolby licensing.

Is the Quality of your Coax Cable Important?

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how to make a low or high pass filter?

i need a low or high pass filter for my sound set up, no money for parts, any house hold items i can destroy for parts?, i have wire and a solder iron.

Actually that is quite easy -

As you probably know, you can fundamentally create a low-pass or high-pass filter from any combination of an active and passive element (that is inductor (L) – resistor (R), or capacitor (C) – resistor)

Just about any electronic device will have R’s and C’s L are a bit more rare (but not that much). Also ironically the older the electronic device the better since older devices tend to have more discrete components (ie: individual R’s c’s and L’s) than the newer highly integrated electronics. Besides, older discretes are bigger and are not always surface mounted which will make de-soldering easier.

So just find Aunt Irma’s broken radio or tape deck player (wow what’s that!) and go nuts. (any useless/discarded electronic device will do!)

As to determining the values of the R,L and C’s
R’s are colour coded so it’s easier to get the value (or with a cheap multimeter). C’s are more difficult (since naming conventions are often OEM specific…) but many middle range multimeters have C’s mesurement capability. L’s are a near impossible to determine short of knowing the exact part number, or having a fancy expensive multimeter or an oscilloscope to determine inductance (you can estimate based on the R of the coil, but’s it’s not particularly accurate… at least not to make it useful to design a filter)

Finally be careful with older components, they tend to have higher levels of lead and other toxic chemicals, so make sure to wash hands well after manipulating the parts and doing the de-soldering…

Have fun!

Simulink / Matlab Tutorial and Example – Low Pass Filter (Part 1)

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Do HDTV’s with QAM all have an F type (coaxial) connector?

I’ve read that if an HDTV includes a QAM tuner that it can receive unscrambled HD channels without the need to rent a box from my cable company. So I’m assuming they must include a connection for a F type coaxial cable.

Yes. It is mandatory in the US for every TV (larger than 32″ I believe) with a tuner to include a digital QAM-free tuner so you can receive off-the air HD or free cable. If your TV has a tuner then it will have an RF F-type connector.

F connector Platinum on Triset 113 coaxial cable – Crimping

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Data Cabling – One Way for a Company’s Success

To become a successful company, it is essential that people should look on every possible detail in order to serve the company better. Regardless whether a company is small in terms of productivity and workforce, people should examine all the alternatives in what can make a company successful in its dealings.

Network among a company’s different areas can really be one of the foundations that can help this company to flourish and enhance their productivity. For a company, having a good data network can keep the company relevant and permits them to deal with their business in harmony and helps them to interact better with their clients and customers.

Therefore, different companies should have good data cabling on order to support their business. Cables are what make a certain company function as a whole. With these good data cables, there can be an effective relays of messages from one department to another and it can speed up the productivity of the company, as it can save more time for the company.

Companies must look for the best service when it comes in providing the best solution for data cables. Moreover, they should look for the quality service that can provide the most innovative cabling solutions when it comes in cabling. A company needs both simple and complex way to connect with its different departments, so it is important to employ the service of a company that has the experience in data cabling.

Surely, employing the best team that can provide the ultimate solution in providing a good network that can make a company function as a whole can really offer success for every company. Furthermore, it can give these companies the edge compared to other companies because it has better network capabilities than others. Data cabling can serve companies the things that they need to become more productive.

About the Author

Looking for the leading company in Data Cabling industry? Visit this link for more info – Voice Cabling.

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Fancy powerstrip question?

I am getting a nice powerstrip, but have some questions about it. It’s linked below if you want to look at it, so you have some idea of what I’m talking about. Anyway – Theirs one area marked as Control Outlet, three marked as constantly hot and the rest as auto-switching outlets. What do these mean? The main reason I am getting this powerstrip is because of the EMI/RFI filtering and to save a tiny bit of energy.

The “auto-switching” outlets are automatically controlled by whatever is plugged into the “control outlet.”

A typical use would be: You plug your computer’s main box into the “control outlet” and then your monitor, printer, and speakers into the auto-switching. Then when you turn your computer off the other three things turn off automatically too. Then you’d plug desk lamps or whatever into the other outlets, as you likely wouldn’t want those to be switched automatically.

Some power strips like this do have an override switch so you can make all the outlets constantly hot. But if you don’t have a use for the “auto switch” behavior it’ll likely be much cheaper to buy a power strip without it. More reliable, too.

Cardas RFI/EMI Caps

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