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Ceramic resonator vs. Quartz crystal for arduino?


Hey- I'm going to build some Arduino clones (as posted from http://fritzing.org/projects/barebones-arduino/ ) and was wondering if it would be better to use a crystal or a ceramic resonator. i will be ordering from Tayda Electronics (Ive ordered before, 10 days shipping for rock bottom prices, I'm ok with that) and the resonators and crystals are +-5c. difference, so I was wondering if I could use resonators, since they are a bit cheaper and I'm ordering a few (around 8). Which ones would be better? Also, does anyone know for the circuit from the above link would work with a 4.5v supply if I just left out the 5v regulator?

Many thanks- Astroboy907

Use crystals, unless you are stuck for space and/or you can accept the higher drift characteristics and you are making 20,000,000 of them,

Typically, the capacitors used with a crystal are 22..33pF, but the crystal data and processor data should be checked.

Steve
Re-design3 years ago
In my experience, yours may be different,

Quartz crystals have two leads ceramic resonators have 3 or if they have two you must add 2 capacitors to make the work, making them three lead parts.

Ceramic resonators don't have nearly as close a tolerance as crystals have and in any use where frequency control is important they are less useful.
astroboy907 (author)  Re-design3 years ago
so i should use quartz? do i have to use the caps with the circuit i have? almost done, i made most of my order, hoping to get this ordered within a few days too
Again

Quartz = needs capacitors to 'start' the cycles= costs a few more cents, but are MUCH more accurate

Ceramic = will make it run, but don't expect any time-critical operations to be stellar (high speed communications, time measurement)


BOTH will be affected by temperature, but I forget which is more susceptible.
Ceramic. Crystals are the gold standard.
astroboy907 (author)  steveastrouk3 years ago
how would i determine the correct cap values? i dont have any fancy measuring system to help determine...
It usually tells you in the data sheet. Typically, they are between 22 and 33pF.

Steve
astroboy907 (author)  steveastrouk3 years ago
It took me a while but i tracked down the part on digikey (or at least one very close to it). heres a link to the included datasheet (http://www.citizencrystal.com/images/pdf/m-hc49us.pdf)
Says 18pf :)
im just using atmega 328s from sparkfun (both bootloaded and non, but i will be burning bootloaders onto the chips)