Vats bypassed!!

[Mike Rolica]

What???  I really appreciate you help  but you have got me lost.  Is this a
transistor you are talking about( 2N3904)? If so is it a npn or a pnp? what
do you mean the "input is a pull high" and what is "drive with a open
collector" what does this do??? Sorry for my ignorance.  
Btw  this timer sometimes works but takes allot of cranking,  is I
disconnect and connect the +v to the timer repeatedly while cranking it
starts better or I should say sooner.  Why would this be?

> -----Original Message-----
> From:	thergen at svn.net [SMTP:thergen at svn.net]
> Sent:	Thursday, September 09, 1999 8:35 PM
> To:	gmecm at efi332.eng.ohio-state.edu
> Subject:	Re: Vats bypassed!!
> 
> Pin 7 of the 8 pin 555 is open collector, I think.
> 
> Tom
> 
> On Thu, 9 Sep 1999, Peter Fenske wrote:
> 
> > 
> > 
> > Hi Mike
> > 
> > What you need is as near a 50% duty cycle as you can get..
> > 
> > The drive to the vats input is also a pull high..
> > 
> > This means you must drive with a open collector..
> > 
> > Translation.. use a 2N3904, drive the base with a 1K to your 555 output.
> > ground the emitter and tie the collector to the vats input.
> > 
> > This should make your girlfriend much happier
> > 
> > :peter
> > 
> >