Parallel Port Interface

[Gavin]

Hi Chris,

If you look under the members projects on the diy_efi site, Al Lipper goes
into this.  Read that, I'm sure it will help.

            -Gavin

-----Original Message-----
From: Chris Wilkinson <cwtoyota at yahoo.com>
To: diy_efi at diy-efi.org <diy_efi at diy-efi.org>
Date: 17 February 2000 07:34
Subject: Parallel Port Interface


>Hi I am new to the list (joined this weekend).
>my name is Chris Wilkinson, and I am very interested
>in all types of fuel injection projects.
>
>My particular project is to build a PC based fuel
>injection system, to be developed around one of my
>race bike engines.  These engines are 250cc 2-stroke
>engnies which produce 45-50 H.P. @ 8500 RPM. This
>project is not meant for any particular purpose except
>that of my further education.
>
>my engine only needs one injector (1 cylinder)
>and I would like to run it from a parallel port.
>My limited knowledge of this subject gives me the
>inclination to develop a C or C++ coded piece of
>software which can send a Puls Width Modulation signal
>out the first data pin on a parallel port. I would
>amplify this (using a switching transistor) to 12v to
>directly control my injector. I also need to devise a
>way (probably using an Analog/Digital Conv.) to read
>my MAP sensor and Temp sensor. I can use my existing
>digital ignition pulse generator to read RPM.
>Using these sensors and my stock carb I hope to create
>a  4 Dimensional  table (MAP*Temp*RPM*TPS) for lookup
>table type injection. then replace the carb with a
>Throttle body and injection manifold.
>
>few... with all that said I am looking for any
>suggestions on how to amplify the injector signal from
>the parallel port, and how to convert the sensor
>analog data (MAP TEMP TPS) to usable digital data.
>
>Also I am not much of a programmer so Is there anyone
>who can tell me how to code (C or assembler in a DOS
>environment) to modulate my injector signal. I also
>thought of using a sound card or USB to modulate the
>signal.
>
>If any of you can help me or steer me straight I would
>be very greatfull.
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