Injector driver question...

[Walter Sherwin]

> I finally managed to obtain decent values for the injector current (high
>and low impedance injectors). The problem was a faulty resistor (it was a
>0.1 ohms resistor, supposedly), which gave a false reading of the current.
>Now everything is normal, the current for the high impedance injector is
>about 0.75A, and so my circuit (the same in fact as in the National
>Semiconductors datasheet) based on the LM1949 can drive high and low
>impedance injectors without modifications.
>
> Hugo.



Glad to hear!   Still wondering about your earlier questions/remarks.
Disable  the timer function (3.9 ms on NS's L1949 data sheet example) and
hookup a high impedance injector.  Does the current ever rise above the
steady state value of .75-.80 A ?  Be curious to know.

Walt.