Absolutely! I just finished wiring up the real (non-prototype) interface card yesterday. As soon as I make sure everything is working, I'll post the wiring diagram and the HAL module. It appears that even the high-latency (1ms) shift register lines are fast enough to directly read the tachometer signal from my cooling fans (120 Hz)!
On Wed, Jan 2, 2013 at 2:11 PM, Marius Liebenberg <mar...@mastercut.co.za>wrote: > Kip, > Would you be willing to share your module. I am in need of a similar > solution. > Marius > > On 2012/12/28 02:54 PM, Kip Shaffer wrote: > > Gene, > > Not sure if you would be interested in the approach I'm using, but it > > may help you or others who are in a similar predicament. > > > > You can use shift registers to add as many additional lines as you want. > > For example, you can take 3 output lines on your parallel port, and > turn > > them into 8, 16, 24 or more output lines. Shift registers come in two > > varieties: Serial-In Parallel-Out, which you would use to create more > > output lines, and Parallel-In Serial-Out which you can use to create more > > input lines. > > > > I wrote a HAL module to implement my setup, which uses 4 pins on the > > parallel port to create 16 output and 16 input lines. I use these lines > > for higher-latency signals, since it takes about 1 ms to shift all the > bits > > in and out. > > > > There is a good article explaining it here: > > > > > http://robots.freehostia.com/Software/ShiftRegister/ShiftRegisterBody.html > > > > -Kip > > > > > > On Fri, Dec 28, 2012 at 5:15 AM, MC Cason <farmerboy1...@yahoo.com> > wrote: > > > >> On 12/28/2012 03:10 AM, Steve Blackmore wrote: > >>> On Fri, 28 Dec 2012 02:34:37 -0500, you wrote: > >>> > >>> > >>>> Mainly the 3 weeks to a month it takes from mainland china for > delivery. > >>>> But since I've decided to sacrifice the one pin I was saving for a > home > >>>> pin, that is the path I'll take. > >>> That seems a long time? I've had several packages from China most have > >>> taken 4 or 5 days, none longer than 10 days from Shanghai to my > doorstep > >>> in UK. They are usually in the country within 48 hours, the delays are > >>> always here! > >>> > >>> Steve Blackmore > >>> -- > >> Here in the Southern part of the US, It regularly takes between 10 > >> days, and 2 weeks for items to arrive from Shenzhen, or Hong Kong, > >> Longer, from Shanghai, or Guandong. The latest set of boards I had > >> made, were air flighted out of Hong Kong, on the 19th. According to the > >> tracking number, they haven't landed yet... > >> > >> -- > >> MC Cason - Assocaite Developer - Eagle3D > >> Created by: Matthias Weißer > >> > >> > >> > >> > >> > ------------------------------------------------------------------------------ > >> Master HTML5, CSS3, ASP.NET, MVC, AJAX, Knockout.js, Web API and > >> much more. Get web development skills now with LearnDevNow - > >> 350+ hours of step-by-step video tutorials by Microsoft MVPs and > experts. > >> SALE $99.99 this month only -- learn more at: > >> http://p.sf.net/sfu/learnmore_122812 > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > > -- > Regards / Groete > > Marius D. Liebenberg > MasterCut cc > Cel: +27 82 698 3251 > Tel: +27 12 743 6064 > Fax: +27 86 551 8029 > Skype: marius_d.liebenberg > Skype Me^(TM)! <skype:marius_d.liebenberg?call> > Get Skype <http://www.skype.com/go/download> and call me for free. > > > > > --- > avast! Antivirus: Outbound message clean. > Virus Database (VPS): 130102-0, 2013/01/02 > Tested on: 2013/01/02 09:11:40 PM > avast! - copyright (c) 1988-2013 AVAST Software. > http://www.avast.com > > > > ------------------------------------------------------------------------------ > Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery > and much more. Keep your Java skills current with LearnJavaNow - > 200+ hours of step-by-step video tutorials by Java experts. > SALE $49.99 this month only -- learn more at: > http://p.sf.net/sfu/learnmore_122612 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery and much more. Keep your Java skills current with LearnJavaNow - 200+ hours of step-by-step video tutorials by Java experts. SALE $49.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122612 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
