Re: DRO on computer?

Hi Halle,
Yeah, that code and schematic is older. I finished the project and
moved on and never really updated things.

Questions:
What version of code did you try, '4 or '5? Also are you using the
serial or parallel interface. And at what baud(57600). Using what
program (Hyperterm?> What crystal freq. are you using. At one point I
had an "@" character as debug sent on reset to test if the watch dog
was being timed-out. I your programmer setting the configuration to
__CONFIG _CP_OFF & _WDT_ON & _PWRTE_ON & _HS_OSC

NOTE: Diode D1 at the LM339 inputs is backwards in the schematic. It
was my 1st rev schematic.

Email me directly by clicking on the partial email on the meassage,
and I will help you as much as I can.

Tell me also what programmer you have, are you using MPLAB, what prot
technique are you using. Sometimes breadboards goof up the crystal
drive due to added capacitance.

Thanks,
Lee


-Lee






--- In CAD_CAM_EDM_DRO@yahoogroups.com, "thomashallin" <halle@t...>
wrote:

> Just finished building the circuit using a PIC described in
>

http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/Caliper_info/Impor

> ted_Caliper_Info/Caliper_stuff.zip and programmed a 16F84 with
> the .hex file but it doesn´t work correctly. When i hook it up to a
> PC it just send a garbage sign about every second. I´m not used to
> working with PICs so I could need some help. Maybe Wilfred or Lee
> Studley? Or somebody else who have (succesfully) buildt the device?
>
> /Halle
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, <halle@t...> wrote:
> > I'm working on an project using low-cost linear-scales, some
> interface-electronics and a PC as a DRO. The scales are (chinese
> made?) no-name capacitive type and has a resolution of 0.01mm.

Maybe

> not as cheap as using a PC-mouse but a little bit better a think

(for

> me anyway). Are there anyone interested out there?
> >
> > /Halle
> >
> > ----- Original Message -----
> > From: "jerrybenham" <jbenham@m...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Tuesday, March 11, 2003 9:34 PM
> > Subject: [CAD_CAM_EDM_DRO] DRO on computer?
> >
> >
> > > Unless I am mistaken (and I could very well be) I read

something

> about
> > > using a PC, some scales mounted to the ways of a machine and a
> serial
> > > cable to connect them to the computer. The computer uses a
> software
> > > package that works directly with the scales to operate just

like a

> > > dedicated DRO.
> > >
> > > Am I dreaming here or does such a setup exist? Where does one
> find
> > > the hardware and/or the software?
> > >
> > > Any leads will be greatly appreciated.
> > >
> > >
> > >
> > > Addresses:
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