Monday, June 2, 2008

FM transmitters

The Palm can be an excellent way to carry our music collection with you anywhere. With its large amount of storage space, either via an SD card or internal memory (such as the LifeDrive 4Gb), it is possible to carry hundreds of hours of music without having to carry another device that meets more this task. However, it is usually not able to connect our usual Palm to audio equipment of our car, limiting who share holders of other portable music players (iPod, Zen, etc).

Only the newer cars have a USB port where you connect our Palm loaded with music. What is normal to have a player / charger CDs, and if you have some time reader even cassette tapes. What do you do then?

Algunos coches traen un puerto USB para el sistema de audio
Some cars come with an USB port for the audio system

The solution to listen to the music of our Palm in the car, and forget to load tapes or CDs, are the FM transmitters. These devices broadcast in FM music that we played Palm, as if it were a radio station more. So we have only tune into the radio of our car and problem solved. The device is connected to the car's cigarette lighter to get the power, and the headphone jack on the Palm for the music.

Transmisor FM para el coche
FM transmitter for the car

Clearly, the more hands may prefer to build your own FM station, following the instructions on this page.

Esquema del transmisor de FM
Outline of the FM transmitter

The range of emission of these devices is a few meters, enough to reach our antenna but not to be taken as an illegal radio station (the radio spectrum is regulated, and FM radio operates at a frequency that is not free, unlike, for example, wifi). However, we will have to choose a frequency that is not already occupied by another string music, to avoid interference.

Something must be borne in mind is that the quality of the music is going to be the one that allows the transmission FM: sufficient but not comparable to a CD for example. FM modulation, as well as analog audio frequencies scraps extremely high or low, to accommodate the signal bandwidth allocated for the channel.

Although manufacturers often announce their producer as "compatible with iPod," or "compatible with the Treo," really culquier FM transmitter to use the headphone jack is compatible with our Palm. They connect to the device you want to use music through their taking of 3.5 mm, that of the speakers or headphones for a lifetime. Just have to take into account if we use a Treo, it comes with a 2.5 mm connector, so you have to buy an adapter plug from 2.5 mm to 3.5 mm, but it is not something that is difficult or expensive to get.

So I ended having to carry tapes or CDs all day.


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