Re: [CAD_CAM_EDM_DRO] Re: Controlling VFDs from your PC?

or reprogram the timer channel to PC speaker to do the PWM for you
or stuff the right bit patterns into the serial port FIFO or hang a PIC off
the MIDI port or try one of the sound card function generator programs
or... oh wait ,how much hacking did you want to do for this? :-)

Brian

> Of course, you could generate an analog output from one of the output lines
> of the parallel port, by generating a PWM signal on the pin by software
> means & feeding the output into a suitable R/C network. The output of the
> network would then be a voltage varying between 0 and +X (where X is the
> voltage on the pin when outputting a "1"), dependent upon the mark/space
> ratio of the PWM output...
>
> Regards,
> Tony