[simpits-tech] Controlling synchros

[Ido Dekkers]

why reinvent the wheel ?

Manuel has already done it for you and it's free ( and writen for linux).
try : 
http://cockpit.varxec.net/electronics/PHCC.html

Ido

On 6/3/05, Matt Bailey <mattb at rtccom.net> wrote:
> On Thursday 02 June 2005 23:25, Simon Bennett set 1,000 monkies in front of
> keyboards and came up with the following:
> >
> > Since these computers run DOS,  the graphics software will be written by
> > me. It should be just fine.  I'll just write my own DOS graphics library
> > for C. Considering the simplicity of the MFD and HUD symbology, I don't
> > have to do anything special.
> 
>         Hmm, can you get realtime anti-aliasing with this?
> 
> > >     Ehh, couldn't you store the last known state of the switch (assuming you
> > >get
> > >unique signals for "on" vs "off" events)?
> >
> > You don't. I suppose I could with another set of 74HC148s and some inverter
> > ICs, but that would greatly increase complexity, chip count, and cost.
> > Using latches and a counter would be much easier.
> 
>         Oh.......so you only know that the switch has changed from on/off or off/on
> (but don't know which one)? That would still work. Keep all switches in off
> position on startup, and make the software startup with all virtual switches
> in the off state, sending a state change whenver a state change is detected
> on one of the switches.
> 
> > >     Heh, you're definitely taking the homegrown route. :) I originally was
> > >really
> > >concerned about the expense of a pit, but I've long since resigned myself
> > >to
> > >this being a fairly pricey project.
> >
> > See, it's easier to spend the money in small chunks than large ones. I need
> > to keep costs down. Besides, skipping an EPIC card gives me a few hundred
> > dollars I can spend on real parts. Also, I firmly believe that if you want
> > something done right, you do it yourself. I just can't justify spending so
> > much on an EPIC and expansions when I can get the same functionality by
> > soldering together a few dollars of components.
> 
>         Yeah, I'm picking up stuff a little at a time. I've also ruled out
> EPIC..Phidgets will do most of what I need, for a lot less (and it's a lot
> simpler), plus it allows me to use Linux exclusively. I'm still keeping
> pretty conservative....the real collecting will come when I've got a better
> income and can stock up on Phidgets and airplane parts on a regular basis. :)
> 
>         -Matt Bailey
> 
> _______________________________________________
> Simpits-tech mailing list
> Simpits-tech at simpits.org
> http://www.simpits.org/mailman/listinfo/simpits-tech
> To unsubscribe, please see the instructions at the bottom of the above page.  Thanks!
>