Lpc2000

----- Original Message ----- 
From: "Tom Walsh" <tom@...>
To: <lpc2000@yahoogroups.com>
Sent: Friday, February 03, 2006 6:25 PM
Subject: Re: [lpc2000] Rise and fall time of capture inputs



>>>>
>>>Aside from the datasheet thing, wouldn't it be possible to use a schmidt
>>>gate to drive the capture intput?  Or some op-amp crossing-detector with
>>>hysteresis?
>>>    
>>>
>>
>>I've done that in the past with that sort of input. I then had a problem 
>>with multiple signals (like contact bounce) which I eliminated with 
>>software.
>>
>>  
>>
> Yes, that is a given when dealing with mechanical contacts.  They do 
> bounce.  As far as that goes, analog lines can "bounce", inductance.

It was an LED/transistor unit, not mechanical.

Leon