AVR-Chat

At 10:38 PM 7/8/2006 -0000, you wrote: 

I need to protect an analog input for an AVR.  Protect it from ESD,
users connecting it wrong (i.e. to 12V power), etc.  Any suggestions
on what to use?  Unity gain opamp?  "transorb" or similar transient
device???  Discussion welcome.  Thanks,

<---Some expouse using zeners and currentl limiting resistors but I've
always found the leakage current to be an issue. So now I use regular
diodes to ground and the Vcc rail. See the attached schematic. The diodes
are general purpose silicon like 1N914 or 1N4148.

Ken

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