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In Car Solar mp3 charger

Discussion in 'Electronic Components' started by Slug, Nov 6, 2006.

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  1. Slug

    Slug Guest

    Hi, I have a cheap mp3 player in my car that runs off a 1.5v aaa
    battery.
    I have to change the battery once twice a week as I forget to turn the
    thing off as it is plugged into the tape slot.
    My plan is build a circuit that will trickle charge a Ni-MH battery via
    a solar cell and power the mp3 player during daylight, and the battery
    will power it in bad light/ darkness.

    This is a very cheap mp3 player and the only power connection it will
    take is off the battery terminals.

    I have a 2.5v solar cell on the way from e-bay, and I know I need a
    diode to stop the batterry discharging via the solar cell, and possible
    a voltage regulator so as not to overload the mp3 player.

    Any other suggestions to improve on this?
     
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