generating a PWM from PC

As per the article on PWM - "it is also easy to use a PC or micro-controller to create the signal" - could you tell me how to do that using a PC signal? also, can the duty cycle be made to vary with the input voltage?

Posted by Lekha (lekha_varsha@yahoo.co.in) on 14/02/2007, at 15:11 GMT