The Bluetooth Solution

The Bluetooth Solution

The technology of Bluetooth will take small area networking to the next level by removing the need for user intervention and help keep transmission power very low to preserve battery power. Each transmission signal to and from your cellular phone will use just 1 mw of power, giving you plenty of space on your battery to talk.

Bluetooth is a networking standard that will work on two levels:

1. It will provide agreement at the physical level, as Bluetooth is a radio frequency standard.

 

2. It will provide agreement at the level of protocol, where products will have to agree on when bits are sent, how many are sent, and how the parties in conversation can be sure the message received is the same one that was sent.

The major draws to Bluetooth is the fact that it’s wireless, inexpensive and automatic. There are other ways to get around wires, including infrared. Infrared uses light waves of a lower frequency than the human eye can, and is normally used in television remote controls.

The technology of Bluetooth is intended to get around the problems that normally come with infrared systems. The 1.0 older standard of Bluetooth has a max transfer speed of 1 MB a second, while the 2.0 Bluetooth standard can manage up to 3.0 MB a second. To make things better, 2.0 is compatible with 1.0 devices.

As a solution to wireless, Bluetooth will eliminate the need for messy cords, keeping everything nice and neat. It’s perfect for those who like to talk on cell phones, as you no longer need to hold the phone next to your ear – which is great for those who travel a lot.

BlueTooth fun

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Build a wireless Finger Phone

Visit us at: http://householdhacker.com

Here is what you need:
1. A bluetooth headset
2. Some standard wires
3. At least one Glove
4. A knife for cutting
5. Time

That’s it. How simple and how awesome?!

Music by: Synaptic_Decay
Link: http://ccmixter.org/files/Synaptic_Decay/17576

Disclaimer:
As with this experiment and all other HouseHold Hacker videos. We cannot be held responsible for damage or mistakes made if attempting the experiments. These projects are for demonstration purposes only and should not be attempted at home.

Bluetooth Operation

Bluetooth Operation

The networking standards of Bluetooth will transmit data via low power radio frequency. Bluetooth communicates on a 2.45 GHz frequency. This very band of frequency has been set aside by international agreement for the use of industrial and medical devices.

Many devices that you already known and use take advantage of this frequency band. Garage door openers, baby monitors, and the next generation of mobile phones all use this frequency within the ISM band. Ensuring that Bluetooth and the other devices don’t interfere with each other is a crucial part of the design process.

One of the ways Bluetooth will avoid interfering with other electronic devices is by sending out weak signals of around 1 mw. In comparison, even the most powerful of cell phones can transmit a signal of 3 watts.

The low power signals will limit the range of a Bluetooth device to around 32 feet, which cut the chances of interference between your computer and other electronic devices. Even though it has low power, Bluetooth doesn’t require a line of sight between the communicating devices. The walls in your home won’t stop the signal, making it great for rooms throughout the house.

Bluetooth can connect 8 devices at the same time. With each of those devices on the same radius, you may think they would interfere with each other, although it’s very unlikely. Bluetooth utilizes a technique known as low frequency hopping, which makes it harder for more than one device to transmit on the same frequency at the same time.

With this technique, a device will use 79 individual, randomly chosen frequencies within a designated range, which change from one another on a regular basis.

In the case of Bluetooth, the transmitters will change frequency 1,600 times or more every second, meaning that more devices can make full use of the radio spectrum. Since every transmitter of Bluetooth will use spread spectrum automatically, it’s very unlikely that two transmitters will be on the same frequency at the exact same time.

When the Bluetooth devices come within close range of each other, an electronic conversation will occur to determine whether or not they have data to share or whether one needs to take total control. The user doesn’t have any buttons to press or commands to give – as the conversation will occur automatically.

Once the conversation has occurred, the devices will form a network. Bluetooth devices will create a PAN (Personal Area Network) or piconet that may fill a room. Once the piconet has been established, the devices will randomly hop in frequencies.

Factors to Consider When Choosing a Bluetooth Headset

Factors to Consider When Choosing a Bluetooth Headset

Creating a good wireless headset for Bluetooth is actually difficult to do. The regular wired headsets are easy to design – with ranging styles.

Bluetooth headsets can never be as small or as light as wired headsets, simply because it needs to include the battery and extra functions. This extra size will impact how the headset mounts on or around your ears.

Comfort
There seems to be two main styles of headsets for Bluetooth. Some are held into place with a loop around the ear. These styles are normally more comfortable, although they may be less secure. The others are held in place by being jammed into your ear – and usually prove to be less comfortable.

Factors to consider

Cost
The cost is an obvious issue, something that you really need to think about.

Ergonomics

1. Check to see if the device is easy to quickly and conveniently put on your ear then take it off again.
2. Are the control buttons on the headset easy to use?
3. The headset should be comfortable to wear for long phone calls.
4. Can you use it with a pair of glasses?
5. Check to see if you can wear it with either ear.
6. When you aren’t wearing it, you’ll need to see how you would carry it with you.
7. The weight is important as well, as you don’t want something that has the risk of falling off.

Ease of use.

1. The commands and controls should be easy to remember.
2. The volume level should be easy to adjust.
3. The unit should turn on quickly.
4. The manual should be very well written and easy for you to understand.
5. There should be a support number for you to call if you should experience any types of problems.

Features

1. You’ll need to know about the battery, the talk time, type and how to tell when it is going dead or fully charged.
2. How many devices can the unit be paired with?
3. Compatibility is also important, as well as the warranty period.
4. Check the sound quality for both sending and receiving audio.
5. What type of range does the headset offer you?

Other important capabilities include voice tags, last number redial, transfer calls, 3 way calling, link to other phones, call reject, and mute. You’ll also want to note if it looks attractive and if it’s too big or too small.