On Fri, Nov 09, 2001 at 09:53:40AM +1300, Andrew Hooper wrote:
> Byron,
>
> Yea, I see what you mean.. Atleast 3 would allow me to roll the 2
> controllers into
> one and incluce the tank steer :)

Well that wasn't my intent. The only three points that I was trying to make is
that a 16C54 would be difficult to build simply and cheaply, that the
current crop of chips are pin compatible, and that they should run the code
with minor modifications.

>
> I just dont think my programming skills are quite that good, Any volenteers
> :)

I don't think you'll have to change much. Just follow the specified guidelines
for modifying the code.

>
> Guess it would be nice also to have an incircut programmable unit that would
> enable the user to reprogramme without to much hastle.

Absolutely.

BAJ
>
> Andrew
> ----- Original Message -----
> From: Byron A Jeff <byron@CC.GATECH.EDU>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Friday, November 09, 2001 9:37 AM
> Subject: Re: Cheap or In Circut 16C54C Programmer.
>
>
> > On Fri, Nov 09, 2001 at 08:54:02AM +1300, Andrew Hooper wrote:
> > > Byron,
> > >
> > > Im building a DC Speed Controller based on this one.
> > > http://www.mcmanis.com/chuck/robotics/projects/servo.html
> >
> > Just took a look. Typical server controller. The 16C54 doesn't seem to be
> > critical.
> >
> > >
> > > I also have 4X16C54C's allready, and since code has allready
> > > been written i dont have to reinvent the wheel :)
> >
> > The source is on the page and should run with any midrange PIC with
> minimal
> > modifications. But you run into the standard "one in hand, two in bush"
> > problem.
> >
> > I took a 5 second stroll and found David Tait's original 16C5X programmer.
> > I'm attaching the schematic. Quite complicated.
> >
> > In comparison take a look at my Trivial Low Voltage Programmer also
> attached.
> > A lot simpler. One chip. One resistor.  BTW it'll program 16F62X and
> 16F87X
> > chips in low voltage mode.
> >
> > >
> > > Actually the situation is this, Im the president of Robot Gladiators Inc
> > > a NP Club and we are looking for an inexpensice tank steer ESC that
> > > we can build on and modifiy.
> >
> > Understood.
> > >
> > > What i was going to use is 2 of these ESC's and a reworked v-tail mixer
> > > as the normal v-tails steer better one way than the other.
> >
> > Any 18 pin PIC will work in its place. The 16C54C isn't critical.
> >
> > So here's your likely choices:
> >
> > 1) Buy a complete PIC programmer that does both parallel and serial parts.
> > 2) Spend time/effort putting together a complicated single use programmer
> >    to program the 16C54C parts you have.
> > 3) Scrap the 16F54C parts, move up to a newer chip what has a simpler
> >    programmer.
> >
> > Personally I'd choose 3 because I'm cheap ;-) and I don't want to spend a
> lot
> > of time/effort developing tools. Even if the chips cost more, it's worth
> it
> > if you can reduce your tool development time.
> >
> > BAJ
> >

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