>     I am currently using a PIC to generate tones on
> the speaker. It runs on 5Volts. The speaker produce a
> tone which is too soft to hear after 5 meters away. Is
> it possible to increase the volume of the speaker
> using a 5Volts setup?

use a bridge: http://www.voti.nl/shop/p/IC-TDA7052-DIP.html

note that the speaker itself can make a big difference.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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