DIYEFI.org Forum

Has a decoder for the stock 24/2 CAS been developed? If not I would like to request one.

Second- does the FreeEms system look for the rising or falling edge of the CAS sensor signal? I have a circuit that takes the +5/-5v signal and cleans it to a falling peak of -5v, or I can reverse the diodes and make it a rising signal. I prefer to leave it this way as I can fire the coils directly from this signal if need be. I can make it a square wave too if that is required.

Kevin Alderman

Yes, that decoder is easily configurable and in use on several vehicles/engines. It's more generic than that, too, handling any even + 1 combo on crank, cam or per cylinder (rare toyota engines).

With all due respect, if you use such a circuit with a VR signal and FreeEMS on an air plane, I will personally hunt you down and kick you in the nuts for endangering the lives of others and my reputation.

Get a proper conditioner, preferably best in class, IE, MAX992X eg: http://brickems.com/brickrpm/comparison/

Some reading for you:

http://en.wikipedia.org/wiki/Variable_reluctance_sensor

http://www.linkecu.com/support/document ... h-note.pdf

Fred.

Thanks Fred-

First, you cant hurt my feelings. After owning a 100 employee business for over half my life I dont have any. At any rate, if I were to cry because you thought I did something wrong, it would still be better than crashing after 3 years of building. The circuit that I have is based on one from the only purpose designed aviation EFI that I am aware of.

Feel free to give me any advice you feel I need.

I will look up the chipsets that you sent info on, and keep making progress toward flying this thing.

KA

I wasn't trying to hurt your feelings, only pointing out that I might try to hurt your nuts :-) You're welcome, all the same, though.

MAX992X == best possible current solution, roll with it ;-)

Fred.

Fred, I bought 2 of Jean Belangers' VR boards, and earlier I bought his low impedance injector driver board. As soon as I get some of these other peoples planes out of the way- (it seems that work always gets in the way of the important things , I will get back to work on the EFI and my own plane.

With the VR board and the injector board, I think I have the hardware to finish putting it together. I will let you know how it progresses.

If you think of any other important hardware, let me know. It takes a long time to get some of these little parts.
KA

Cool, no, just a slew of IO filtering and a decent power supply setup. Take a look at what MrOnion is doing here for likely scope of required components: viewtopic.php?p=33767#p33767