Hex Schmitt trigger

[aen]

Is this just like the touchiest wimpiest chip ever?

I rig up an ultra simple oscillator from pins one and two, everything is good, it goes Thump thump thump (I'm using a 10uf cap i think)  

Then i hook up a pot inplace of the resistor in the osciallator scheme, and it's great!   I can tune up and down!  Hoooray!  Finallly!  Then i take the battery out to try another pot or something,

And it dies.  Never ever makes any sounds again.  Under any circumstances i ahve imagined/tried.

The only thing i can think of is the remote possibility that the battery may have touched the opposite nubbies on the battery clip, essentially running the power backward for a micro second...


Anyone have similar (shitty) experience?

[caress]

cmos chips are really sensitive to static electricity.  you may have zapped it with a static charge without even knowing it...

in my experience with them i've never had any problems, though.

[iopop]

Check this on polarity protection, http://www.geofex.com/Article_Folders/m ... switch.htm

My own experience with cmos circuits are limited so I cant say I had the similar problem.

[aen]

I was thinking of pretty caveman-esque protection, just installing an SPST switch on the + wire to prevent any accidental connections...