On Thu, 2009-11-05 at 00:59 +0200, Dumitru Stama wrote:
> Hi guys,
> i have a question. My PIC18F2520 is set up to output a PWM signal. I
> want to amplify the signal's current and feed it into a speaker.
> Right now using only a single PN2222A i can hear the sound but the
> volume is quite low.
> I tried a LM386 and the output is what i really want but only if i
> select the 200x gain schematics.
> I don't know what should i try now, i really want to use only simple
> components and not a dedicated amplifyer like LM386.

What is the impedance of your speaker? What's the frequency of your PWM?
What's the purpose of R1?

TTYL

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