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nuckolls.bob(at)aeroelect
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 Posted: Mon Apr 09, 2012 1:12 pm Post subject: Open source product development for OBAM aircraft |
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At 02:41 PM 4/9/2012, you wrote:
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That's true, but it's fairly simple to 'roll your own' Arduino with
just an ATMega and a particular serial and reset schematic. I
haven't done the design exercise, but an ATMega168 would probably do
the job, and they're as little as $2.31 on Mouser.
The FTDI serial chips are only $2 nowadays too, apparently, if
you're inclined to make it USB programmable.
There are definitely other solutions, but I've had a surprisingly
good experience with these things.
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Sure . . . but the ATM168 is a big chip with lots
of I/O we can't put into the enclosure I have.
A large proportion of energy/time to bring a product
to an airplane is packaging. If you can capitalize
on off-the-shelf packaging, that problem goes
away. If the ECB layout I have could be slightly
modified to the new task, that time-to-market
item is shortened.
To be sure, there are MANY options capable of
a host of tasks. I'll suggest we establish some
design goals that get us to the finish line with
a minimum of new investment. If we were talking
about a product where projected sales were in
the thousands or even hundreds, perhaps a 'next
size up' enclosure with silicon capable of more
expansion would be attractive. But I'd be surprised
if construction/sales of the simplest and fastest
project would exceed 100 pieces in the next 5 years.
Return on investment of development time is
much more significant for low volume projects.
The PIC 12F675 is a reduced instruction set
device usually programmed in assembler. This
is an excellent learning environment for
teaching micro-controllers and Bollean
logic. It gets the student better connection
with the inner workings of the chip.
Bob . . .
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raymondj(at)frontiernet.n
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| Posted: Sun Apr 15, 2012 4:06 pm Post subject: Open source product development for OBAM aircraft |
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Thanks to everyone for their input about chips and the next steps. I'll
plan on getting out my C books and studying when the time comes.
The free software aspect of AVR that Jeff mentioned appeals to me. Since
this is all just for yucks, I like to keep the costs as low as possible.
Thanks again to everyone.
do not archive
Raymond Julian
Kettle River, MN
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 04/12/2012 06:22 PM, rayj wrote:
| Quote: |
Greetings,
Now that all the software folks are listening, I'll ask a question that
I'm sure others are wondering. After a person finishes learning a
particular kit, Parallax in my case, what's the next step up in
capability and versatility. Is there something that is generic or does
each chip manufacturer have a separate track for using their product.
Not trying to start a conflict, just wondering what the world looks like
out there.
do not archive
Raymond Julian
Kettle River, MN
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 04/12/2012 05:43 PM, Robert L. Nuckolls, III wrote:
>
> <nuckolls.bob(at)aeroelectric.com>
>
> At 10:07 AM 4/11/2012, you wrote:
>
> <gregmchugh(at)aol.com>
>
> Bob and all,
> I am planning to code the wig-wag function using the standard Microchip
> development tools using C. I ordered the PICkit 1 Flash Starter Kit
> directly from Microchip on Monday for $36 plus shipping and it is
> scheduled to arrive today. See Part Number: DV164101 at
> http://www.microchip.com/.
> Okay. I I'll get the FAT fets laid onto the artwork, modify
> the do-lots schematic to agree, and get some boards
> ordered.
> I checked on the SWORDFISH Basic compiler and it appears to only
> support the 18F family, 12F does not seem to be supported.
> Hmmm . . . fooey. Keep us up to date on future recommendations/
> discoveries. I used to write a lot of 6800/6502 assembler for
> embedded applications. I use Turbo Basic for test systems. I'd
> like to get salty with the RSC controllers but after one had
> the 150+ constellation of instructions in the legacy chips,
> it takes a whole new outlook on programming to get 'er done
> with less than 40!
>
> Any single software development solution would not target a wide
> enough user base to make these types of modules viable for anything
> but limited use.
> agreed
>
> I am very pleased to see that there are more responses coming in
> from software folks, I was afraid I was stuck in a sea of hardware folks.
> I won't start with the war stories on embedded software development.
> Here is a Dilbert that shows how the war story saga ends...
>
> Anyway, welcome software folks and let's here lot's of ideas on
> what you would like to see happen with this project...
>
> Had to put new tires on the car today so didn't get to
> 'play' . . . I'll have some time in the morning.
> Bob . . .
>
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