What is the difference between the DAC and PWM outputs..?

Please somebody clear the concept of DAC and PWM outputs for me.

A DAC is simple.
DAC stands for Digital to Analogue Converter.
You give it a number, say 128, and it outputs a voltage, say 2.1 volts.
For 256 it puts out 4.2 volts.

A PWM (Pulse Width Modulation) puts out a stream of high and low levels either 0 volts or 5 volts.
How this stream is used depends on the circuit it drives.
You could control the power to a motor.
If the Off time is much more than the On time the motor will have little power and run slowly.
If the On time is much more than the Off time the motor will have more power and run faster

That is the basic difference, have a look in our tutorial section for more details.

Thanks ExperimenterUk