Shop OBEX P1 Docs P2 Docs Learn Events
Ceramic Resonators.... — Parallax Forums

Ceramic Resonators....

ArchiverArchiver Posts: 46,084
edited 2004-01-04 16:02 in General Discussion
Hi,

I'm currently working on a soccer robot using the BS2p.....

In order to control the motors I'm using the Dual H-Bridge.. but I
wanted to be able to vary the speeds so I bought a Pulse-Width-
Modulation coprocessor from AWC... But I just found out I'll need a
50MHz ceramic resonator...

Are these things cheap? Are they commonly availiable (preferably in
Australia)? Does anyone know where I could get them?

Any help is much appreciated.

Thanks
James

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2004-01-03 09:49
    From: "James Dang" <ensignkim113@y...>
    >
    > I just found out I'll need a 50MHz ceramic resonator...
    >
    > Are these things cheap? Are they commonly availiable
    > (preferably in Australia)? Does anyone know where I
    > could get them?
    >
    Well, yes, but I don't have a specific source in Australia you understand.
    They are cheap. A 48 MHz ceramic resonator from Murata is U$ 0.77 in
    quantity one from our Digikey.

    Hypthetically, it should be even less where you live since you're so much
    closer to Murata, but... governments and tariffs and all that. Who knows.
    Don't expect much more than an Oz buck, I'd say. Here's the Murata catalog
    to get some part numbers:

    http://www.murata.com/catalog/p16e14.pdf

    What you need to locate is a retail parts house with no significant minimum
    order quantities. Sorry I can't help with that in your area, James.

    Gary
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-03 09:57
    At 09:38 AM 1/3/04 +0000, James Dang wrote:
    >Hi,
    >
    >I'm currently working on a soccer robot using the BS2p.....
    >
    >In order to control the motors I'm using the Dual H-Bridge.. but I
    >wanted to be able to vary the speeds so I bought a Pulse-Width-
    >Modulation coprocessor from AWC... But I just found out I'll need a
    >50MHz ceramic resonator...
    >
    >Are these things cheap? Are they commonly availiable (preferably in
    >Australia)? Does anyone know where I could get them?

    Hi James -

    It appears that MicroZed has them:
    http://www.microzed.com.au/

    Click on resonators and crystals. They appear to be $ 4.40 AUD in lots of one.

    >Any help is much appreciated.
    >
    >Thanks
    >James
    Regards,

    Bruce Bates



    >To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    >from the same email address that you subscribed. Text in the Subject and Body
    of the message will be ignored.
    >
    >
    >Yahoo! Groups Links
    >
    >To visit your group on the web, go to:
    > http://groups.yahoo.com/group/basicstamps/
    >
    >To unsubscribe from this group, send an email to:
    > basicstamps-unsubscribe@yahoogroups.com
    >
    >Your use of Yahoo! Groups is subject to:
    > http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-03 11:25
    thanks for the help guys [noparse]:D[/noparse] !
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-03 13:55
    For the record, the PAKs ship with their own resonators, so you don't need
    them unless you lose or destroy on. In any event, we sell them in singles
    and packs of 5. Parallax also has 50Mhz resonators so you might check with
    your local distributor.


    Al Williams
    AWC
    (Stamp Project of the Month is late this month, BTW, but it is forthcoming).


    >
    Original Message
    > From: James Dang [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=PnQju9p2CyF1sNMO63a8wx109YqsLKU4OPIn0mFP1-RA4bLVPmxqJprPXoOxuPRWHDyHMlV_BtC4OP6HPg]ensignkim113@y...[/url
    > Sent: Saturday, January 03, 2004 3:38 AM
    > To: basicstamps@yahoogroups.com
    > Subject: [noparse][[/noparse]basicstamps] Ceramic Resonators....
    >
    >
    > Hi,
    >
    > I'm currently working on a soccer robot using the BS2p.....
    >
    > In order to control the motors I'm using the Dual H-Bridge.. but I
    > wanted to be able to vary the speeds so I bought a
    > Pulse-Width- Modulation coprocessor from AWC... But I just
    > found out I'll need a
    > 50MHz ceramic resonator...
    >
    > Are these things cheap? Are they commonly availiable (preferably in
    > Australia)? Does anyone know where I could get them?
    >
    > Any help is much appreciated.
    >
    > Thanks
    > James
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the
    > Subject and Body of the message will be ignored.
    >
    >
    > Yahoo! Groups Links
    >
    > To visit your group on the web, go to:
    > http://groups.yahoo.com/group/basicstamps/
    >
    > To unsubscribe from this group, send an email to:
    > basicstamps-unsubscribe@yahoogroups.com
    >
    > Your use of Yahoo! Groups is subject to:
    > http://docs.yahoo.com/info/terms/
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-04 02:58
    Original Message
    From: "James Dang" <ensignkim113@y...>
    To: <basicstamps@yahoogroups.com>
    Sent: Saturday, January 03, 2004 9:38 AM
    Subject: [noparse][[/noparse]basicstamps] Ceramic Resonators....


    > Hi,
    >
    > I'm currently working on a soccer robot using the BS2p.....
    >
    > In order to control the motors I'm using the Dual H-Bridge.. but I
    > wanted to be able to vary the speeds so I bought a Pulse-Width-
    > Modulation coprocessor from AWC... But I just found out I'll need a
    > 50MHz ceramic resonator...
    >
    > Are these things cheap? Are they commonly availiable (preferably in
    > Australia)? Does anyone know where I could get them?
    >
    > Any help is much appreciated.


    They are cheap enough.

    Have a word with Don McKenzie at www.Dontronics.com. If he doesn't stock
    them he'll know who does.
  • ArchiverArchiver Posts: 46,084
    edited 2004-01-04 16:02
    --- In basicstamps@yahoogroups.com, "James Dang" <ensignkim113@y...>
    wrote:
    > Hi,
    >
    > I'm currently working on a soccer robot using the BS2p.....
    >
    > In order to control the motors I'm using the Dual H-Bridge.. but I
    > wanted to be able to vary the speeds so I bought a Pulse-Width-
    > Modulation coprocessor from AWC... But I just found out I'll need
    a
    > 50MHz ceramic resonator...
    >
    > Are these things cheap? Are they commonly availiable (preferably
    in
    > Australia)? Does anyone know where I could get them?
    >
    > Any help is much appreciated.
    >
    > Thanks
    > James


    If you got them from Al, check with him first. In my dealings with
    Al, he offers very complete information and parts. I would suspect
    you might have received them, but overlooked them in the box.

    It seems that the companies we buy from on the list don't get enough
    praise, and the simple fact that they do what they say and often a
    little more, we don't complain.

    (home-cone-is-it we complain 10 times more than compliment?)

    Anyway, with my dealings with Al Williams, I am very satisified.

    Dave
Sign In or Register to comment.