From my experiance....the caps across the parts are not really for surge suppression, but more to keep the voltage from sagging when the parts are switching. The caps store the energy and when needed....gives it. >From: David Covick >Reply-To: pic microcontroller discussion list >To: PICLIST@MITVMA.MIT.EDU >Subject: Re: [PIC]: .1uf between Vcc and gnd ??? >Date: Fri, 5 Jul 2002 21:24:10 -0700 > >Gabriel, > >I have a product on the market with NO caps across Vcc and Gnd. >It is a PIC12C672 run with a 3.6V lithium battery. >Thousands sold and around the world and not seen any issues from leaving >caps off. >I decided to do this to save parts count/cost. Normally I use a 0.1uF, but >in this case I left it off due to the battery being very close to the PIC >(short track). >I'm sure someone on this list will tell me that what I did was wrong, but >since it works fine I'd be happy to hear from someone at to why it is a bad >idea. > >David > > >----- Original Message ----- >From: "Gabriel Caffese" >To: >Sent: Friday, July 05, 2002 9:04 PM >Subject: [PIC]: .1uf between Vcc and gnd ??? > > > > Hello everyone, > > > > Does it make any sense to have a 0.1uf cap between Vcc and Gnd > > if my circuit is gonna be powered by a battery ? > > > > Thanks in advance.- > > > > -- > > http://www.piclist.com hint: To leave the PICList > > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > > > > > > >-- >http://www.piclist.com hint: PICList Posts must start with ONE topic: >[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.