[JrZook]

Well its been on and off for quite a while but finally I've had some success. Just graduated uni so why not give myself a challenge, lets make an adjustable ignition system for the zuk!

Overall Specs:

CPU = Atmel Atmega32 running a 16MHz clock

Max RPM = 6800
Min Triggering RPM = 150
Min Accuracy ~0.25degs at 6800rpm

Min timing 10deg BTDC
Max timing 50deg BTDC

Pickup:
Standard zuk dizzy with reluctor gutted and locked. (Thanks to Damo)

Load Sensor:
GM MAP sensor 1 BAR

Adjustability:

16x16 Timing MAP adjustable to 0.5deg per site
Dwell 1.6-8 milliseconds (RPM dependant).

User Interface:

20x4 character LCD with real time data of RPM, MAP sensor voltage, timing degrees, and current timing map site.
PC client to adjust map values on the fly.

Its a bit messy atm but its a prototype and it runs, now got to get it on to a PCB and box it. Then it can be installed permanently. Here are some pics;



CPU, voltage regulator(power supply) and GM MAP sensor



Installed on the gunnie pig, think i may have to rename it FRANKENZOOK!



The LCD with real time data.



Ignition coil igniter, large MOSFET.

Hope you enjoy, feel free to ask any questions.
Cheers Dan

[Damo]

Make the pics a little bigger Dan, no one will be able to see what's going on!

[Scrawny]

This looks really interesting!! My eye sight ain't that good though

[JrZook]

Sorry guys, should of taken off my glasses before i uploaded. Better now?
Looks big on my PC.
Dan

[royce]

have you scratch built this or is part of some kind of kit?

[JrZook]

royce wrote:

have you scratch built this or is part of some kind of kit?

Nah no kits here mate all scratch built, the code, software, hardware triggering circuit etc. At least this way i know exactly what going on with it.

Cheers Dan

[paulv]

How does the nuts and bolts of your ignition setup compare with what is available here?


http://www.siliconchip.com.au/cms/A_108521/article.html
and
http://www.siliconchip.com.au/cms/A_108762/article.html

Very imp[ressive to be able to design this kind of stuff from scratch!

[JrZook]

Not sure on the exact nitty gritty things from that system, but if i recall it ran a 16x16 timing map and 0.5degree adjustments. Mine also includes a fully adjustable spark cut rev-limiter (0-100% spark cut), start-up algorithms, laptop interface for tuning as well as data logging and a real time engine data interface.

The overall goal of my system was to create a reliable and very adjustable unit, display real time data and log data. This was done as a lead up to gain some real data and info to start creating an FI computer. With the system i designed the adjustability is virtually endless (provided you do a bit of brain scratching and maths).

Overall I found out that an ignition controller requires much much more accuracy just to even get the engine to run. I think an FI controller will be a tad more easier to design than this. Plus side is, with a bit of modification I can use a majority of this CPU code, software, triggering hardware and user interface on an FI controller project

Cheers Dan

[paulv]

Creating a FI computer from scratch eh.
Wow. lots of inputs and variables.

Have you had a look here:
http://www.diyefi.org/index.htm
and here:
http://sourceforge.net/project/showfile ... _id=214452

[royce]

when you do the injection bit, make the injector timing adjustable on all cylinders, mini people will love you, but not want to pay for it

[paulv]

If you can put something together as a kit that can be made by your average joe electronics enthusiast, that does programmable sequential injection, you might get silicon chip magazine or jaycar or omething pay you to publish it....