ive been wondering on how well the parport would work for a pwm based DAC,
i'm interested in getting enough from it to test out and play with my servo
amps and motors and encoders... and i'll need to hook up the VFD as well
once i get the axis and limit switches and all that fun stuff going, but i
plan on that being with a mesa card.
On Dec 17, 2007 9:25 PM, Kirk Wallace <[EMAIL PROTECTED]> wrote:
> I would like to build a parallel port DAC board capable of running a
> VFD. My VFD's use 0 to +10 Volts for setting speed, then a Forward and a
> Reverse pin which sink to a Common. My plan so far, includes a pair of
> 74244 buffers, maybe a 7224 8-bit DAC, +10 Volt regulator, +5 Volt
> regulator and a pair of opto-isolators. I looked through the HAL
> components that I could find, but couldn't find one that would convert
> an unsigned 32 to binary, I guess a wsum in reverse. I may need to write
> a new component, but if there is a component I overlooked, please let me
> know.
>
> If there is interest, I would like to make it an open project, maybe
> with a wiki, so that everyone can submit input, then collect
> documentation and orders to have boards made. Wudyathink?
>
> --
> Kirk Wallace (California, USA
> http://www.wallacecompany.com/machine_shop/
> Hardinge HNC lathe,
> Bridgeport mill conversion, doing XY now,
> Zubal lathe conversion pending)
>
>
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