Paul,
I set up the aluminum disc and taped a nut to the circumference and
position the RX-8 sensor and connected it to a scope.
This was chucked up into an old drill press and I measured the
spindle speed with an optical tach from Harbor Freight.
The 500 rpm speed yielded a 2.5 volt pulse and a 4.25 volt pulse at
1350 rpm.
I was testing a 2^nd gen CAS using the same setup and got similar
results and when I connected it to the Zeal Daughter board it
cleaned it up and kept the pulses at the same voltage level.
Currently working on brackets to position the sensors out of the way
and 180 degrees apart.
Joe Berki
Good work Joe.
When you feed this into a LM1815 you get a nice positive going narrow
rectangular wave out at a constant 5 volts high.
Paul Lamar
Joe model of MegaSquirt are you running?
Steve Carlisle
The Zeal board just have the LM1815 on the board. If you using the
complete mega squirt I am waisting my time.
Paul Lamar
Paul, I just assumed he was using it with a MS. I suppose you could
interface it to any micro. Steve Carlisle
It is a wast of time doing that ancient computer technology. We did
not even have smart cell phones in those days
I know as I did one back in the early 70's. If fact it was the first
documented embedded processor. I wrote it in hexadecimal. Later
translated to assembly language by Los Alamos Scientific Labs.
http://www.rotaryeng.net/IEEE-road-test-sys.pdf
I am reading a book about a famous Marine 3 star general called
Brute Krulak. In the book the Vietnam war is discussed among many
other things. The people of all of Vietnam did not under stand the
difference between communism and capitalism. In the south they did
not know what communism or capitalism was. They were dirt framers.
Therefor they cared less. No reason to fight in the south and the
north was brain washed with mythical communism. Communism demands
that you convert the rest of the world to communism. If you are a
communist you cannot tolerate capitalism. That was what the cold war
was all about.
The failure of communism in Russia happened when most of the people
understood the difference.
I was struck with a parallel here. If you don't understand the
difference between assembly language and a high level computer
language you will never under stand the Maximite. You will have to
get one and use it to understand it.
Paul Lamar
Beware, there are various assembly languages. If one really knows the
architecture and what the instructions are effecting, then one has a
leg up on the high-level language programmers.
What you are programming with is a bus centric system, as opposed to
a RAM centric system. There are nuances there that one can take
advantage of and actually get more speed out of the system,
especially as an ALC programmer. It is only with advanced compilers
with good optimizers that you start to approach this.
And it is for this reason that I wonder if another "programmer" you
referred to as having done ALC programming was really a high-level
language programmer programming with ALC.
I now return you to making that rotary system sing and take the
10,000 & 20,000 time to climb records.
Regards, Steve Thompson
I have no intension of doing Assembly Language Coding. Way too time
consuming and tedious. We don't need the speed. A BASIC interpreter
works fine for what we are doing. Hardware is much cheaper than
software. Add hard ware and reduce the time to program.
We are not building and selling a million units.
I am in the process of designing two rotor CD ignition system. It
will be much lower cost than the M&W. It will require two hall
effect crank angle sensors.
Paul Lamar
I concur whole heartedly. Was just trying to give you some of the
issues with programming styles (or lack thereof) when it comes to
ALC.
Regards,
Steve Thompson
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