Post by thread:Recommended oscillator

Hello everyone, I am fairly new at this. I want to use a PIC16F84A using a 20MHz oscillator. The oscillator needs to be pretty accurate so I think I will need a crystal. Do you have any recommendations what kind/manufacturer/ect that I should use. Part numbers would help me out a lot. Thanks. -------------------------------------------- Joshua Melbourne White Vice Chair NCSU Student Chapter of IEEE Treasurer Eta Kappa Nu, Beta Eta Chapter North Carolina State University Electrical and Computer Engineering -------------------------------------------- -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Use a 20 mhz parallel cut xtal - Digikey part number X439-ND $0.58 each. You also need a couple of 18 or 20 pf capacitors. By the way, if you haven't gone and bought the 16F84A yet, I suggest you get the 16F628 instead - it is cheaper and has a lot more features, such as builtin USART for serial I/O, analog comparator, more RAM ... Larry At 02:08 PM 4/17/2003 -0400, you wrote: {Quote hidden}>Hello everyone, > >I am fairly new at this. I want to use a PIC16F84A using a 20MHz >oscillator. The oscillator needs to be pretty accurate so I think I will >need a crystal. Do you have any recommendations what kind/manufacturer/ect >that I should use. Part numbers would help me out a lot. Thanks. > >-------------------------------------------- >Joshua Melbourne White >Vice Chair >NCSU Student Chapter of IEEE >Treasurer >Eta Kappa Nu, Beta Eta Chapter >North Carolina State University >Electrical and Computer Engineering >-------------------------------------------- > >-- >http://www.piclist.com hint: PICList Posts must start with ONE topic: >[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads Larry Bradley Orleans (Ottawa), Ontario, CANADA -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Ahh, NCSU my old alma mater. I would recommend Digikey part number X909-ND. That's a 20MHz ceramic resonator with built in capacitance. They are quite rugged, with strong pins that fit easily into sockets. You'll have to put it in sideways of course because of the grounding pin. That's how we did our project for Sutton's class. I assume that's what this is for? ;) Incidentally, you are aware there is a part's shop on campus where you can get most of this stuff for free right? Assuming it is for a class. Reply to me via email if you would like details. (spam_OUTChuckPLTakeThisOuTcomcast.net) Hope this helps, -==- {Original Message removed}

Yeah, I am taking senior design and I am using a PIC for my project. The parts shop at State only had 8 to 10 MHz oscillators on hand, thats why I am looking from a 20MHz one. Thanks for the advice. -------------------------------------------- Joshua Melbourne White Vice Chair NCSU Student Chapter of IEEE Treasurer Eta Kappa Nu, Beta Eta Chapter North Carolina State University Electrical and Computer Engineering -------------------------------------------- {Original Message removed}