----- Original Message ----- 
  From: Dumitru Stama 
  To: Microcontroller discussion list - Public. 
  Sent: Wednesday, November 04, 2009 5:59 PM
  Subject: [EE] Amplifying a PWM signal


  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.

  Thank you very much in advance
  Dumitru Stama



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What PWM frequency?
Where is your integrator?


  *
  |  __O    Thomas C. Sefranek  tcs@cmcorp.com
  |_-\<,_   Amateur Radio Operator: WA1RHP
  (*)/ (*)  Bicycle mobile on 145.41, 448.625 MHz

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