[Diy_efi] Re: new EFI controller

Marcell Gal cell at x-dsl.hu
Wed Mar 12 12:44:00 GMT 2003


Hi Bill, 


> The megasquirt driver uses PWM to do peak and hold.

http://www.student.dtu.dk/%7Ec973396/megasquirt/files/sch.pdf
(the schematic from http://caffrey.dk/megasquirt/ ) 

With this emulated zener (look at T3 on last page) pwm would
be very inefficient (even worse than analog current limiting).
People seem to be using several kindof injector driver
configurations with megasquirt.
Anyway, I cannot find a reason to connect T3 collector
to GND instead of 12 V. 

 Marcell 

-- 
+36 70 2 654 789 

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