gEDA-user: furnace controller I/O port again

[Dave McGuire]

On Nov 2, 2006, at 8:15 PM, Bob Paddock wrote:
>> I'll look into it.  The thing about op amps is that they're cheap and
>> tiny.
>
> Which frequently gets people into trouble when they try to use
> Op-Amps as Comparators:
...
> TI:
> Op Amps and Comparators - Don't Confuse Them
>
> Operational amplifiers (op amps) and comparators look similar; they  
> even have very similar schematic symbols.
> This leads a lot of designers to think they are interchangeable.  
> There is a strong temptation to use a spare section
> of a multiple op amp package as a comparator to save money. This  
> application note will explain why designers should not do this.
>
> http://encon.fke.utm.my/nikd/latest/sloa067.pdf
> Download .pdf (sloa067.pdf, 150 Kbytes)"

   Not to butt in, but...wow, that is a VERY informative  
article...Thanks for sending that URL!

               -Dave

-- 
Dave McGuire
Cape Coral, FL