Hello
On the Arduino uno board there is 16 mhz crystal.
Does anyone know if this 16 mhz crystal is it SERIES type crystal or is it 16 mhz crystal a 18 PF or 20PF crystal?
Thank for the help mrel

 

mrel,

You need 2 ceramic 22pF load capacitors in parallel if you use an external crystal. This picture shows it nicely. If you use a ceramic resonator instead of a crystal, you don't need the load capacitors.
Ωhm

 

The thread i post about the crystal,what i trying to find out is what kind of crystal on the arduino uno broad I know it a 16mhz crystal But is it a(series type) or (18pf type) or (20pf type).
Because went to Digikeys website to buy crystal.
Digikeys lists three different type crystals there are series,18pf,20pf.
So question is what kind of crystal on the arduino uno broad (series ,18 pf,20pf ).
mrel

 

according to ArduinoUno schematic is it 16MHz with 22pF capacitors

http://arduino.cc/en/uploads/Main/arduino-uno-schematic.pdf

 

and here is nice tutorial

http://treehouseprojects.ca/fusebits/

and ultimately read the datasheet of the MCU:
http://www.atmel.com/Images/doc7799.pdf

page 30 or so...