is a 8051 controller pin output is enough to drive a 8ohm 2 W speaker, do u need additional resistor to pull up or transistor to drive it.
i dont think a microcontroller can drive a speaker directly. make a small amplifier and connect it to the 8051 to drive the speaker.is a 8051 controller pin output is enough to drive a 8ohm 2 W speaker, do u need additional resistor to pull up or transistor to drive it.
i dont know the microcontroller but maybe it has an analogue output so it will be possible to connect the amplifier directlyIn addition to the above, the 8051's output pin is only capable of two states, a logic high and a logic low. You may need some additional intervening device like a digital to analog converter to reproduce sound.
http://www.iguanalabs.com/sound/i dont think a microcontroller can drive a speaker directly. make a small amplifier and connect it to the 8051 to drive the speaker.
In addition to the above, the 8051's output pin is only capable of two states, a logic high and a logic low. You may need some additional intervening device like a digital to analog converter to reproduce sound.
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