Additional Injector Controller

[BamaInstrument]

The pulse is "stretched" and you will get an output pulse width that will
last the same duration from the second trigger as if it were the only pulse

dh

----- Original Message -----
From: "Jörgen Karlsson" <jorgen.m.karlsson at home.se>
To: <diy_efi at diy-efi.org>
Sent: Saturday, April 07, 2001 4:36 PM
Subject: RE: Additional Injector Controller


> I wonder one thing about the 555, is it really possible to retrigg the
555.
> What happens when the trigg pulse come before the previous output pulse
has
> ended, does the 555 reset the capacitor or is the trigg pulse ignored.
>
> If the trigg pulse is ignored (I belive it is) we have a big problem, the
> result will be that when the required injector pulse width is longer then
> the time between the trigger pulses the injectors will only be opened
every
> other trigger event.
>
> I once built a pulse train generator that used a 74xx123 for a similar
> circuit. It was mentioned in the design discussion, that a 555 cannot
> retrigg. Is this correct?
>
> Jörgen
>
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