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

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