<<snip>
-----------------------------------------------------
>
> Here is a company that embeds the BASIC
interpreter into
> the PIC. These are so cheap and so easy to use
everybody on
> here should buy one of these things and play with
it.
> Your knowledge on EFI computer systems will
immediately jump to a
> higher plateau. Tons of Internet support.
>
> http://www.rev-ed.co.uk/picaxe/
> http://www.picaxe.org/
> http://www.phanderson.com/picaxe/picaxe.html
> http://www.hippy.freeserve.co.uk/picaxeqa.htm
> http://dave.fraildream.net/picaxe/index.shtml
>
> Attached is the 73 page clearly written manual. It
includes a
> tutorial on the version of BASIC used to program
the chips.
>
> Interestingly you can use a graphical method of
programming
> which is very easy to learn. It basically is a
visual
> representation of your program in flow chart form.
You arrange
> the building blocks on the computer screen and and
it writes the
> program for you. A lot like what you did in
kindergarten :)
>
>
--------------------------------------------------------
>
> Here a program that controls a DC motor. It is the
heart
> and soul of the simple constant dribble EFI
system. This is
> it! There is little more.
> http://www.phanderson.com/picaxe/pwm.html
>
> BTW no returning hot fuel to the fuel tanks.
>
>
-----------------------------------------------------
>
> I went on the PICAXE web site and downloaded the
27 meg free
> programming editor.
http://www.rev-ed.co.uk/picaxe/
>
> This is the greatest thing since sliced bread
> when it comes to programming. I wrote my first
program in 30 seconds
> using the Kindergarten blocks.
>
> Not only that but they have included a free
simulator.
> My 3 line program program blinks a green light.
The simulator
> is animated and it steps through your program over
and over
> again while the green light on the screen blinks
on and off.
> Here is a screen capture from my Windoze computer.
> It also gives you BASIC and assembler source
listings.
>
> All I can say is WOW! This is way beyond clay and
everybody
> can become Leonardo da Vinci of programming.
>
> I wish I had something like this when I wrote my
first year long
> 6502 assembler program for the first $5000 Lamar
Instruments Real
> Time Road Test System that then Managing Editor
John Dinkel on
> here bought for Road & Track magazine way back in
1975.
> That got me a super head start in computers.
Thanks again John
> for your trust and belief in me. Which eventually
allowed me to
> do the last picture :) (Not Robin :)) I forgot her
name :)
>
> BTW NO expensive solenoid fuel injectors to plug
up or fail.
> No fuel injector bungs welded to intake tubes. No
fuel rails.
> No pressure regulators. No fuel return lines to
the fuel tanks.
>
> The EFI constant dribble fuel hardware system
under the cowl
> consist of only two -4 AN fuel hoses. One for each
rotor.
> That's it!!!!! It feeds fuel to the engine only in
the amount
> it needs for the prop load at the moment.
>
> We are looking at nothing short of a revolution in
low
> cost EFI systems for aircraft engines here IMHO.
>
> Paul Lamar ...No rotor no motor.
I agree with you.
Is there a US distributor? I would like to buy a
PICAXE system without the
delay of transatlantic delivery.
The BASIC language is a great one for teaching. The
PICAXE system should be
an ideal learning environment. In my case I wish to
learn the hardware side
of the equation.
A word of caution however. BASIC tends to be slow.
The PICAXE system has
only a polled interrupt; this has lots of
performance implications. A polled
interrupt (purists would argue that it is not a
hardware interrupt at all)
places a high overhead on the system. The result is
that one PICAXE might
not be able to handle the real time requirements.
Then again it might. AND a
complete system could incorporate more than one to
share the load. Caveat
emptor!
Will work up a draft system diagram for your
consideration. Hardware must
come before software.
Doc Custer
Retired Software Engineer and sometime Audiologist
That was true in the old days but these things
average 10,000
BASIC instructions per second as I recall.
That's at 4 megahertz. One ass. instruction per
microsecond
or one million ass. instructions per second.
Some of the 28 pin and 40 pin PICAXE chips will
clock
at 16 megahertz or 40,000 BASIC instructions per
second.
This is a compiler and not a interpreter. I was
wrong
about it being an interpreter.
You might have to do a bit of assemble languages to
use the
hardware interrupt. Try the polling interrupt first.
The simple version don't have a lot to do so it can
spend
most of the time polling.
Try www.world-education-services.com
email masc1@usa.net
www.panderson.com
Paul Lamar ...No rotor no motor.
Paul,
I highly recommend buying PicAxe products from Peter
Anderson. His prices and support are great, and
shipping costs are low. FYI, the link above is
missing the 'h'. Proper link below:
http://www.phanderson.com/
I've used the PicAxe on a few projects myself. It's
an amazing micro for those who want to get up and
running quickly. It's an unbeatable value, certainly
taking a bite out of Parallax's BasicStamp market.
I'm watching with interest your cheap efi ideas.
There are some similarities to the Ellison TBI.
Proper fuel filtration will be very important. Those
tiny fuel distribution holes could easily get plugged
by contaminants.
Roger Enns.
Yep. One advantage of the low pressure system. Bigger holes.
Paul Lamar ...No rotor no motor.
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