my bad prom

[Mike Rolica]

Thank you so much!!!!! :)  ;)       8)

> -----Original Message-----
> From:	Ken Kelly [SMTP:kenkelly at lucent.com]
> Sent:	Friday, September 03, 1999 11:10 AM
> To:	gmecm at efi332.eng.ohio-state.edu
> Subject:	Re: my bad prom
> 
> Mike,
> 
> 	This is from an email last year when I was doing the same thing.
> 
> > Easy.  Just get a 555 and connect it up as follows:
> > 
> > Pin 1 is Ground. Pin 8 is +12V. Connect a 0.1 uF ceramic cap between
> these
> > pins, with short leads, for bypassing. Otherwise it may misbehave.
> > 
> > Tie pin 4 to pin 8.
> > 
> > Tie pin 6 to pin 2.
> > 
> > Add a 3.9K resistor from pin 7 to pin 8. (A 3.3K will be close enough)
> > 
> > Add a 22K resistor from pin 6 to pin 7. (You could adjust this one for
> > precision setting, but it's not needed for this application)
> > 
> > Add a 1 uf capacitor (electrolytic OK) + side to pin 6, - side to pin 1.
> > 
> > Add a 0.1uf cap from pin 5 to pin 1.
> > 
> > Output is on pin 3. It will be approx.
> > -----------------------------------------------------------------
> > Have fun...
> 
>