I use 4 MHz resonators with buildt in caps. They have a rated accuracy of 4.0000 so they have a very good accuracy for most simple uses. KreAture ----- Original Message ----- From: "Nate Duehr" To: Sent: Thursday, November 28, 2002 11:50 PM Subject: Re: [PIC]: HS (Crystal) oscillator without caps? > How accurate does your gadget need the oscillator to be? > > Could you use a ceramic resonator with the caps already inside in the > same holes as the crystal is in now? > > They are available through a number of vendors and are inexpensive even > in low quantities, as long as your application can handle the (slightly) > lower accuracy. > > On Thu, 2002-11-28 at 15:33, Edson Brusque (PICList) wrote: > > Hello, > > > > I'm building a little gadget using a PCB I've made some time ago. > > This PCB was made for a PIC16F628 using it's internal 4MHz oscillator, > > and the two XTAL pins are connected to two side-by-side LEDs on the PCB. > > > > Now, this gadget needs to run at 20MHz, so I'm soldering the XTAL > > pins at those PCB holes made for the two LEDs. The thing is working very > > well, but I don't have where to place the two (15-33pF) XTAL capacitors > > on this PCB. > > > > My question is: Can I just leave out those caps? I know the caps are > > needed for giving the oscillator better stability, but if this little > > gadget are working ok without the caps, will it do any harm? Like > > someday this gadget wouldn't startup, or will it suddenly stop... > > > > Best regards, > > > > Brusque > > > > -- > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > > -- > Nate Duehr, WY0X (AIM: BigNateCO) > nate@natetech.com > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads