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Interface 32 ohm, 0.25W speaker with AT89C52

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shigha

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I want to play music with AT89C52. I got the codes and simulated on proteus well. But i know that to get it in hardware, i must amplify it.
How can I do it?
Can I use LM386?
 

I used it but iam not getting any output. What should I do?
 

I used this ones circuit
 

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  • music-with-8051-microcontroller-AT89S52.jpg
    music-with-8051-microcontroller-AT89S52.jpg
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Use these circuits. You need a filter between MCU o/p pin and op-amp input pin. You can't give digital o/p directly to op-amp input. You will get cracking noise.
 

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  • lm386-audio-amplifier-schematic.gif
    lm386-audio-amplifier-schematic.gif
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  • images.jpg
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  • LM386ampschematicfinal.jpg
    LM386ampschematicfinal.jpg
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But Iam not getting any sounds at all. Please note that Iam talking about 32 ohm speaker
 

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