And the long wire replaces what exactly ? What's in the other end of the "long wire" ? How long is the "not-so-long-wire" ? Jan-Erik. -----Original Message----- From: Lim KK [mailto:mark_limkk@HOTMAIL.COM] Sent: den 13 maj 2003 12:59 To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE]: Noise problem with schmidt trigger yup, I tried to pull it up, but the problem persist. The output of the encoder is pulses (0V to 5V). I think the encoder circuit producing the pulses are fine. When I replace the input of the schmitt trigger with a long wire(1m), the problem appears. mark >From: Jan-erik Svderholm (QAC) > >Reply-To: pic microcontroller discussion list >To: PICLIST@MITVMA.MIT.EDU >Subject: Re: [EE]: Noise problem with schmidt trigger >Date: Mon, 12 May 2003 09:10:35 +0200 > >Pull up or pull down resistors on the input to >the schmitt trigger ? What is the output from the >encoder ? Just a open or closed switch ? > >Jan-Erik. > > >Lim KK wrote: > >The input to my schmitt trigger is actually pulses > >coming from an optical encoder. > >-- >http://www.piclist.com hint: PICList Posts must start with ONE topic: >[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads _________________________________________________________________ STOP MORE SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics