Paul,
  Which Arduino would be good to acquire to learn more?
  I am looking at the Mega 2560.
   Radio Shack is a distributor.

  Joe Berki

  ADK

  Mouser or Digikey. Two USB's

  Paul Lamar

There are several different models- if you plan to just learn the mini
version is around $20.00. The Mega is almost twice as much but has almost
three times the I/Os, and the ADK will interface with an android device.
For us, this is significant in that we can monitor our engines, outside
pressure and temp, a GPS chip, etc and display it all on a cheap android
tablet. You can even control the devices from the tablet touch screen. Look
on you tube for the Arduino Mega ADK, there are videos showing guys
controlling lights with their android phones.

The Android Mega will interface with a bluetooth board which will connect
to the Android tablet- meaning no usb cables to deal with.

The programming is not too difficult after you learn the basics- And when
it compiles to the board it does it in machine code so it is small and
works fast.

One quirk is the delay function- it is easy to make an led blink using the
led function- not so good to use in an efi system, when you tell the system
to delay it literally stops everything until the delay part is over. So, if
you read RPM and want to adjust ignition timing the delay function would
not be it- you would have to calculate the firing using math instead of the
delay command.

Next- when you get ready to compile the program if it works then yay!, but
if it throws an error it will highlight a line. Most of the time the
problem is the line or section of lines above.

Paul, when my wife gets done with the big computer I will send you the
original code for the efi program I did so far. I know that my RPM calcs
are not right, no matter what I get 640 rpm.

KA

Paul Lamar
Just picked up a Mega ADK.  I have a LCD display and will take some of
the sending units from the rotary and create a display for temp
and pressure just to get some experience. I will set them up
as voltage dividers and use the A to D converter.

Joe Berki


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