555 EFI

[Clarence L.Snyder]

thergen at svn.net wrote:
> 
> Picture an op-amp with the non-iverting input connected to pin 6 and the
> inverting input connected to pin 5.  Pin 5 is also connected to a resistor
> divider network that pulls it to 2/3 Vcc.  There is probably a symbolic
> view on one of the semiconductor manufacturers sites.  I'm looking at the
> cover of two different books that show this configuration.
> 
> The 2/3 reference point can be yanked around to where you want by using
> pin 5.  It can also affect the 1/3 reference for pin 2.
> 

So this pin 5 could be labelled "offset?" In other words, it changes the
voltage that 2/3 of must be reached to trigger? Or put another way, does
it change the reference voltage of the comparator?
> >