[Diy_efi] 555 timer for injector driver

[mark krawczuk]

HI , this is as far as i know....

you have  power ( positive 12 volts) going in one side of injector, then u 
switch the earth side to make the injector open/close.
u dont need  a relay to drive the injector,  use  the 555 timer  to 
switch/pulse a  power transistor to switch the injector, cause the relay , 
if used to switch a injector open for  fuel use will take tooo long.

i am not sure if the 555 time can switch enough current by itself ????

 even though, using a relay to operate injector should work,.

mark k


----- Original Message ----- 
From: "jeff matthews" <maple69vt at hotmail.com>
To: <diy_efi at diy-efi.org>
Sent: Thursday, July 07, 2005 11:09 AM
Subject: [Diy_efi] 555 timer for injector driver


> Hi-
> To keep my ??? simple,  I built a 555 timer to work on a little 
> experiment,  I have it energizing the solenoid on a  12v relay, why won't 
> it open and close my injector? (it's just a basic saturated 550cc).  Is 
> there some secret to on making an injector operate?
>
> Like I stated,  this is for an experiment, just thought I could handle 
> making an injector fire on the bench...
>
> Best regards,
> JEFF
>
>
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